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Selective photodecomposition of highly toxic pollutants is a significant challenge because the free radicals produced by photocatalyst show an indistinguishable attack on all contaminants in wastewater. To realize selective photodegradation, an organic imprinted Ag-PANI/CdS/Fe3O4/Biochar photocatalyst (IM-Ag-PANI/CdS/Fe3O4/BC) was successfully prepared by photoinitiated polymerization method. The formation of heterojunction facilitates the separation of photoexcited carriers and effectively inhibits the photocorrosion of CdS, thereby improving the photocatalytic activity and stability of photocatalysts. Moreover, the imprinted cavities in Ag-PANI layer help to selectively adsorb and degrade 2-mercapto-1-methylimidazole (MMIZ), resulting in a high selectivity coefficient of 2.40 relative to 5-Mercapto-1-methyltetrazole, and the photodegradation efficiency of MMIZ is boosted up to 76% within 1 h. This work provides a new idea to construct stable photocatalysts with high selectivity for the decontamination of target pollutants. [ABSTRACT FROM AUTHOR]

In this study, the hydrothermal in situ growth technique was used to controllably produce the stable nanoflower-like Pt-MoS2/BiVO4 (Pt-MS/BVO) composite. MoS2 nanospheres were embellished with BiVO4 and Pt nanoparticles. Excellent photocatalytic efficiency for the TC degradation was demonstrated by the Pt-MS/BVO composite. In the light irradiation, degradation efficiency was 11 and 5 times higher than MoS2 and BiVO4, respectively. The reaction speed of Pt-MS/BVO was 1.9, 3.2, and 18.3 times that of MoS2/BiVO4 (MS/BVO), BiVO4, and MoS2, according to the photocatalytic kinetics fitting curve. MoS2 not only resulted in good dispersion of Pt and BiVO4, furthermore but also performed a significant part in the creation of direct Z-type charge-transfer composites with relatively short charge diffusion distances and abundant intimate contact interfaces, while the noble metal Pt acted as an electron collector to suppress the electron–hole complexation rate, thus improving the photocatalytic activity. This study sheds light on the ternary photocatalyst's rational design for multilayer electron transport and achieves efficient removal of tetracycline residues in the water environment. [ABSTRACT FROM AUTHOR]

• The sample is prepared by ultrasonic agitation and in-situ hydrothermal method. • Heterojunction formed between BiVO 4 and MoS 2 improves the photocatalytic activity. • h+ can be enriched on MoS 2 which had a larger contact area with tetracycline. • The activity of BM20 heterojunction is 5.64 and 4.23 times that of MoS 2 and BiVO 4. In this work, BiVO 4 /MoS 2 (BM) heterojunction was prepared by combining ultrasonic agitation exfoliation and in-situ growth method. Since flower-like MoS 2 comprised a larger contact area with pollutants, by decorating dewdrops-shaped BiVO 4 on the flower-like MoS 2 , h+ on BiVO 4 can be transferred to MoS 2. Therefore, h+ with strong oxidizing ability enriched on MoS 2 can effectively attack the pollutants and substantially improve the photocatalytic activity of the as-prepared heterojunction. The degradation rate of tetracycline with BiVO 4 /MoS 2 heterojunction (68.83 % in 120 min) was 5.64 and 4.23 times that with pure MoS 2 (12.19 %) and pure BiVO 4 (16.26 %), respectively. This work provided a new idea for the construction of highly active MoS 2 -based heterojunctions. [ABSTRACT FROM AUTHOR]

It is still a challenging work to realize the universality of photocatalytic materials for unselectively removing environmental pollutants in water. Here, a ternary magnetism CoFe2O4/g-C3N4/HNTs heterojunction photocatalyst is firstly prepared, and the morphology, crystalline property, surface area, and magnetic recycling capability of the photocatalyst were investigated. The CoFe2O4/g-C3N4/HNTs shows a superior degradation efficiency for degrading 2-mercaptobenzothiazole (MBT) than that of pure g-C3N4. The high degradation performance that derives from the hollow structure of halloysite nanotubes (HNTs) can inhibit stacking of g-C3N4, which results in a larger specific surface area and more abundant reaction sites. Meanwhile, the heterojunction structure between g-C3N4 and CoFe2O4 improved the separation efficiency of charge carriers. In addition, the intermediate products, degradation pathway, and reaction mechanism of representative MBT pollutant over the CoFe2O4/g-C3N4/HNTs photocatalyst are revealed in depth. This work makes an important development. [ABSTRACT FROM AUTHOR]

A novel biomass carbon quantum dots@Bi2WO6 (BC-QDs@Bi2WO6) photocatalyst with uniform dispersivity was prepared via a dialysis-assisted hydrothermal process. Multiple techniques including HR-TEM, XPS, UV-Vis, PL, photocurrent analysis, and electrochemical impedance spectroscopy were employed to investigate the morphology and structures as well as the optical and electronic properties of the as-prepared samples. The photocatalytic activity of BC-QDs@Bi2WO6 was assessed by the degradation of antibiotics (tetracycline, ciprofloxacin, and gatifloxacin). The improved photocatalytic activity was attributed to the quantum effect of BC-QDs, which acted as the light harvesting center, electron reservoir, and reaction center for degrading the pollutants. Furthermore, a plausible mechanism for photocatalysis was put forward according to the ESR and quenching experiments. The present work can have significant advantages in the construction of biomass carbon-based photocatalysts in pollutant degradation and improved light utilization. [ABSTRACT FROM AUTHOR]

A novel magnetic double-conductive photocatalyst of Fe3O4@Bi2O3/C was successfully prepared by microwave and deposition technology, and it showed satisfactory photocatalytic activity in the degradation of tetracycline compared with that of pure Bi2O3 under visible light. The improved degradation efficiency of the as-prepared Fe3O4@Bi2O3/C is attributed to the better conductivity of biomass carbon and Fe3O4 quantum dot, which significantly inhibited the recombination of electron–hole pairs and improved the optical absorption. In addition, the mechanism exploration of the radical trapping experiments and ESR measurement indicated that h+, ṖO2− and ṖOH participated in the tetracycline removal procedure. The possible photocatalytic reaction mechanisms including transfer behavior of charge carriers and the intermediate products of tetracycline degradation were also revealed in depth. This work provides a promising approach to construct a biomass carbon-based photocatalyst for the wastewater treatment. [ABSTRACT FROM AUTHOR]

By combining the photopolymerization method with surface imprinting techniques, a magnetic photocatalyst modified with a POPD–CdS heterojunction embedded imprinted layer (a POPD–CdS heterojunction embedded magnetic imprinted photocatalyst) was successfully prepared. And ciprofloxacin (CIP) can be recognized and degraded by the POPD–CdS heterojunction embedded magnetic imprinted photocatalyst. The coefficient of selectivity of the POPD–CdS heterojunction embedded magnetic imprinted photocatalyst relative to CdS, POPD–CdS and a non-imprinted photocatalyst were 1.88, 1.98 and 2.12, respectively. Moreover, the secondary pollution resulting from CdS photo-corrosion can also be effectively suppressed by the surface imprinted layer. More importantly, the POPD–CdS heterojunction, as a functional monomer, was embedded into the surface imprinted layer. This method not only ensured sufficient contact between POPD and CdS, but also effectively solved the problem that the photocatalytic activity decreased drastically because of coverage by the surface imprinted layer. Therefore, this work offers an innovative concept and technical approach for the application of the selective removal of specific target pollutants in complex water environments. [ABSTRACT FROM AUTHOR]

A novel functional inorganic imprinted ZnFe2O4@Ag3PO4/SiO2 photocatalyst was synthesized by a facile sol–gel method combined with the surface imprinting technique, which possessed excellent stability. By optimizing the amount of materials, we determine the preferable addition amounts of tetraethoxysilane (TEOS) and tetracycline to be 0.06 mL and 0.06 g, respectively. This as-prepared functional inorganic imprinted ZnFe2O4@Ag3PO4/SiO2 photocatalyst was proved to not only exhibit high photocatalytic activity (the photodegradation rate was 61.52% under the simulated sunlight irradiation of 60 min), but also possess a strong oriented ability to selectively recognize and photocatalyze tetracycline (the coefficient of selectivity ( k selectivity) was 5.14 for ciprofloxacin and 3.63 for gatifloxacin). Moreover, the functional inorganic imprinted ZnFe2O4@Ag3PO4/SiO2 photocatalyst prepared with SiO2 as the inorganic imprinted layer has good stability and can be recycled many times. This work not only puts forward a novel design idea of functional semiconductor materials but also is expected to be widely applied to the oriented catalysis for a target substance according to the practical requirement. The functional inorganic imprinted ZnFe2O4@Ag3PO4/SiO2 photocatalyst was synthesized by a facile sol–gel method combined with the surface imprinting technique, also possess a strong oriented ability to selectively recognize and photocatalyze tetracycline. [ABSTRACT FROM AUTHOR]

The Z-scheme imprinted ZnFe 2 O 4 /Ag/PEDOT was synthesized by the microwave polymerization method and surface imprinting technique, which possessed good partial hollow spherical structure, good light response ability, good magnetic separation performance, good photocatalytic stability and reproducibility. More importantly, due to the introduction of Ag/PEDOT into the surface imprinted layer, Z-scheme structure was formed to enhance the photocatalytic activity based on Ag acted as the mediator, meanwhile, owing to the existence of the imprinted cavity in the surface imprinted layer, the selectivity had been significantly improved, in a word, the as-prepared Z-scheme imprinted ZnFe 2 O 4 /Ag/PEDOT achieved the goal for simultaneously improving the photocatalytic activity and selectivity. Z-scheme imprinted ZnFe 2 O 4 /Ag/PEDOT possessed the highest photodegradation rate (71.77%) for degradation of tetracycline under the simulated sunlight irradiation of 120 min, which was approximately 4.74 times to that of ZnFe 2 O 4 , 1.42 times to that of Ag/PEDOT and 1.31 times to that of non-imprinted ZnFe 2 O 4 /Ag/PEDOT, respectively. And the coefficient of selectivity of Z-scheme imprinted ZnFe 2 O 4 /Ag/PEDOT relative to ZnFe 2 O 4 , Ag/PEDOT, non-imprinted ZnFe 2 O 4 /Ag/PEDOT was 1.84, 1.82, 1.79 in the single antibiotic solution and 1.78, 1.75, 1.67 in the binary antibiotic solution, respectively. This work provided a new synthesis strategy for the imprinted photocatalysts and also provided a new idea for the treatment of specific pollutants in the water environment. [ABSTRACT FROM AUTHOR]

The novel magnetic PW-doped PEDOT (PW@PEDOT) imprinted photocatalyst with good reproducibility was prepared by the surface imprinting technique and microwave heating method. Due to the existence of PW@PEDOT and imprinted cavity in the imprinted layer, the as-prepared magnetic PW@PEDOT imprinted photocatalyst not only had higher photocatalytic activity, but also had the excellent specific recognition ability for selective photodegradation of TC. This paper proposed a new idea to prepare the imprinted photocatalysts. The novel magnetic PW@PEDOT imprinted photocatalyst with good reproducibility was prepared by the surface imprinting technique and microwave heating method, which not only had higher photocatalytic activity, but also had the excellent specific recognition ability for selective photodegradation of tetracycline. [ABSTRACT FROM AUTHOR]

Developing high-efficiency and low-cost semiconductor photocatalysts with carbon layer modification has been proved to possess the potential advantage for dramatically improved photocatalytic performance in recent years. Here, a novel magnetic core-shell Fe 3 O 4 @C modified with Co 3 O 4 nanochains photocatalyst (Fe 3 O 4 @C/Co 3 O 4 ) is first constructed via a facile synthetic strategy using inexpensive and ordinary yeast as carbon source. The obtained composite structure is conducive to the transfer and separation of charge carriers due to the synergetic effect of carbon layer and Co 3 O 4 nanochains. In consequence, the photodegradation activity of various pollutants is significantly enhanced relative to that of pure Co 3 O 4 under visible light irradiation. Moreover, the introduction of magnetic materials makes this photocatalyst recycled easily by an external magnetic field and reused effectively without obvious activity loss. This work may provide a feasibility analysis and exemplificative strategy for using simple raw materials as carbon source to observably improve universal photocatalytic activity of composite semiconductor photocatalyst. [ABSTRACT FROM AUTHOR]

IM-PDI/ZFO S-scheme heterojunction assembled by mutual magnetic attraction possesses good selective photodegradation ability for TC. [Display omitted] • ZFO aggregates PDI by mutual magnetic attraction, increasing the contact area with pollutants. • The formed S-scheme heterojunction enhances the degradation ability of pollutants. • The ability of IM-PDI/ZFO to specifically degrade TC is enhanced by imprinting modification. • The selectivity coefficient of IM-PDI/ZFO to non-imprinted modified PDI/ZFO can reach 2.31. Recyclable and stable imprinting modified PDI/ZnFe 2 O 4 (IM-PDI/ZFO) was assembled by mutual magnetic attraction. Interestingly, the obtained IM-PDI/ZFO exhibited granular ZnFe 2 O 4 (ZFO) attached to the aggregated PDI. The mutual magnetic attraction of ZFO leaded to the aggregation of PDI, which effectively improved the ability of IM-PDI/ZFO to enrich pollutants and further enhanced the photodegradation activity. Meanwhile, due to the appropriate energy band position, PDI and ZFO formed an S-scheme heterojunction, eliminating useless photogenerated charge carriers and enhancing the photodegradation ability of IM-PDI/ZFO. Most importantly, because of the introduction of imprinting modification technology, tetracycline (TC) was added during the synthesis process. The IM-PDI/ZFO obtained imprinted cavities consistent with the three-dimensional structure of TC, which was not only conducive to improve the photocatalytic activity under visible light, but also endowed IM-PDI/ZFO with high selectivity, the selectivity coefficient reached 2.31. This work presents an innovative viewpoint for the synthesis of magnetic imprinted S-scheme heterojunction photocatalysts. [ABSTRACT FROM AUTHOR]

The traditional photocatalysts have no selective photocatalysis ability and are difficult to separate and recycle. Herein, the imprinted modified non-metal S-scheme heterojunction photocatalytic membrane (IM-NSH-PM) was prepared via imprinting modification technology and dopamine (DA) tight adhesion method, which possessed high throughput (2548.6 L m−2 h−1 bar−1), good self-cleaning performance, excellent stability and recovery performance. The cross-linking and polymerization of DA on PVDF membrane surface can form a strong interaction between basement membrane and imprinted modified non-metal S-scheme heterojunction (IM-NSH), which made IM-NSH-PM adhered closely together. Besides, the formed S-scheme heterojunction between PDI and g-C 3 N 4 , which weakened the recombination rate of electrons and holes and further improved the photodegradation ability. The photodegradation rate of TC by IM-NSH-PM reached 71.88%. More importantly, under the action of imprinting modification, IM-NSH was endowed with many imprinted cavities consistent with the three-dimensional structure of tetracycline (TC), thereby TC can be preferentially selective adsorbed and degraded, and the selectivity coefficient of IM-NSH-PM to non-imprinted modified non-metal S-scheme heterojunction photocatalytic membrane (NIM-NSH-PM) was 1.88. This work shows a meaningful idea for exploring self-cleaning membranes with good selective photodegradation ability for the target pollutant. [Display omitted] • IM-NSH-PM with good flux, self-cleaning, stability and recovery performance is obtained. • A strong interaction formed between PVDF and IM-NSH makes IM-NSH-PM closely together. • The formed S-scheme heterojunction enhances the degradation ability of pollutants. • The ability of IM-NSH-PM to specifically degrade TC is enhanced by imprinting modification. • The selectivity coefficient of IM-NSH-PM to NIM-NSH-PM can reach 1.88. [ABSTRACT FROM AUTHOR]

Imprinted modified POPD/CdS S-scheme heterojunction possesses good selective degradation ability and CdS photocorrosion resistance. [Display omitted] • IM-POPD/CdS S-scheme heterojunction is obtained by microwave polymerization technique. • Imprinted modified POPD layer inhibits CdS photo-corrosion. • S-scheme heterojunction formed by POPD and CdS improves the photocatalytic activity. • Imprinted modified POPD layer achieves the orientation degradation of DFM in different water environments. Imprinted modified poly-o-phenylenediamine (POPD)/CdS S-scheme heterojunction (IM-POPD/CdS) was synthesized by microwave polymerization method, which showed excellent CdS photocorrosion resistance and photocatalytic degradation performance towards danofloxacin mesylate (DFM). Interestingly, owing to the presence of imprinted cavities on IM-POPD/CdS, IM-POPD/CdS can selectively adsorb and degrade DFM. IM-POPD/CdS exhibited a good orientation degradation ability in different water environments. More importantly, due to the coating of the imprinted modified POPD layer and the consumption of h+ in the CdS valence band by e- on the POPD, the photocorrosion of CdS is greatly inhibited, and its secondary pollution is reduced. This study provides a new idea for photocorrosion resistant functional heterojunction materials and an exemplary way for the effective directional degradation of target pollutants. [ABSTRACT FROM AUTHOR]

Highlights: [•] MITP is obtained by surface imprinting technology and microwave heating method. [•] PMMA has been successfully formed and existed in the surface-imprinted layer. [•] PMMA improves the photocatalytic activity of traditional imprinted photocatalyst. [•] MITP can effectively select degradation of ENRH in binary antibiotic solution. [ABSTRACT FROM AUTHOR]

Highlights: [•] Magnetic and dual conductive imprinted photocatalysts (MCIPs) were prepared. [•] The MCIPs were used to treat 1-methylimidazole-2-thiol. [•] The MCIPs exhibited high photocatalytic activity and selectivity. [•] The photodegradation processes obeyed the pseudo-first-order kinetic reaction. [•] The mechanism of photodegradation were carefully discussed. [ABSTRACT FROM AUTHOR]

Highlights: [•] MIP was prepared by the surface imprinting technology and the photo-induced method. [•] MIP had the strong ability to degrade TC in the ternary antibiotics solution. [•] The photodegradation mechanism of TC was inferred from the MS. [ABSTRACT FROM AUTHOR]

Highlights: [•] The photocatalyst was prepared based on a magnetic composite by a mild sol–gel way. [•] Magnetic composite was achieved by coating Fe3O4 onto COOH-fly-ash cenospheres. [•] In order to treat waste by waste, fly-ash cenospheres were prepared from coal fly ash. [•] Effect of inorganic salts on the removal of enrofloxacin hydrochloride was studied. [Copyright &y& Elsevier]

2D Amphiphilic Amorphous photoreactors, with two components of rich-sulfur MoS 2+x and deficient-oxygen MoO 3-y to selectively chemisorb and activate N 2 and H 2 O molecules, produce ammonia by gas-phase nitrogen fixation at room temperature and normal pressure. [Display omitted] • 2D amorphous nature of photocatalysts provides ubiquitous active sites. • Selective chemisorption and activation of N 2 and H 2 O molecules on amphiphilic surface. • Gas-phase nitrogen fixation at room temperature and normal pressure. • Low-energy cost solution-based synthesis is facile and readily up-scalable. The gas-phase Haber–Bosch process has been the main industrial source of ammonia over the last century. However, its reliance on high temperature and high pressure for enormous energy input emits greenhouse gas to air and is associated with the depletion of fossil fuels. The need of the hour is to replace this method with environmentally sustainable processes, among which, photocatalytic nitrogen reduction has attracted much attention. In this work, we report a low cost, scalable manufacturing of gas-phase photoreactors for nitrogen reduction under ambient conditions based on 2D amorphous molybdenum oxysulfides, i.e. MoS 2+x -MoO 3-y composites. They show excellent nitrogen reduction efficiencies of ∼141 μmol/g/h with remarkably stable performance. The amphiphilic MoS 2+x and MoO 3-y composites selectively chemisorb and activate N 2 and H 2 O molecules, respectively, and enable multiple photodriven redox reactions towards NH 3 evolution. Such photoreactors for ambient ammonia synthesis provides a potentially feasible route towards next-generation gas-phase industrial ammonia production. [ABSTRACT FROM AUTHOR]

The 3D flower spheroidal Fe 3 O 4 @C@(BiO) 2 CO 3 maintained a good morphology and significantly improved the visible light-driven photocatalytic activity for degradation of tetracycline. • Fe 3 O 4 induces (BiO) 2 CO 3 to generate 3D flower spheroidal morphology. • C layer is synthesized by using waste corncob to facilitate charge separation. • 3D flower spheroidal morphology is good for absorption of visible light. • In-depth understanding of the path of electronic transfer is discussed. • Fe 3 O 4 @C@(BiO) 2 CO 3 has stronger adsorption capacity and photocatalytic activity. A novel 3-dimensional (3D) flower spheroidal morphology of Fe 3 O 4 @C@(BiO) 2 CO 3 composite photocatalyst was synthesized by facile hydrothermal treatment with waste corncob and directional induction with Fe 3 O 4 nanoparticles. The photocatalytic performance of Fe 3 O 4 @C@(BiO) 2 CO 3 composite on photodegradation of tetracycline under visible light in 90 min was highest at a relative mass fraction of 2.5 wt% by weight of Fe 3 O 4 @C, and 4.12 times higher than that of pure (BiO) 2 CO 3. Meanwhile, the formation of the morphology, the specific paths of charge transfer, the reasons for the improvement of photocatalytic performance and the mechanism of photocatalysis were investigated and explained in detail. This study can inspire some new idea for building the novel and efficient development of photocatalyst and resource reuse, while benefiting their practical application. [ABSTRACT FROM AUTHOR]

A novel efficient magnetic oxidation-reduction like-Z-scheme structure photocatalyst composed of g-C 3 N 4 , CdS and the oxidation-reduction mediators of Fe 3 O 4 is successfully synthesized by heat treatment methods. The like-Z-scheme CdS/Fe 3 O 4 /g-C 3 N 4 photocatalyst exhibits universal degradation property on removing kinds of antibiotics, and the photocatalytic activity is better than that of CdS/g-C 3 N 4 and pure g-C 3 N 4 . The excellent photocatalytic performance is originated from the unique like-Z-scheme structure and oxidation–reduction function of Fe 3 O 4 , which effectively separates the hole-electron and sufficiently utilizes the photogenerated carriers for generating more active radicals. The results showed that when the content of Fe 3 O 4 is 10%, the CdS/Fe 3 O 4 /g-C 3 N 4 exhibited superior activity. The best degradation rate constant K in the like-Z-scheme photocatalyst is approximately 26 times of pure g-C 3 N 4 . The important role of Fe 3 O 4 and the photocatalytic mechanism are also discussed in detail. This work not only puts forward a novel design idea of the like-Z-scheme material, but also is expected to be widely applied to the universal removal of kinds of antibiotics according to the practical requirement. [ABSTRACT FROM AUTHOR]

The Fe 3 O 4 @mTiO 2 /C composite photocatalyst is first constructed by a simple and eco-friendly strategy, which presents the excellent photocatalytic activity for removing bisphenol A in water under visible light due to its the dual sensitization effect and double conductive structure of Fe 3 O 4 and carbon. • The dual sensitization effect and conductive structure of Fe 3 O 4 @mTiO 2 /C photocatalyst was synthesized successfully. • The composites exhibits the outstanding photocatalytic activity for removing bisphenol A under visible light. • The photodegradation mechanism of Fe 3 O 4 @mTiO 2 /C photocatalyst was investigated in depth. In this paper, we prepared Fe 3 O 4 @mTiO 2 /C (the mesoporous TiO 2 denoted as mTiO 2) photocatalyst via a simple synthetic method, and it exhibits strong light response under visible light region because of the dual sensitization effect of Fe 3 O 4 and carbon. In addition, the composite photocatalyst also has double conductivity, which is beneficial to the transfer and separation of charge carriers due to the synergetic effect of Fe 3 O 4 , carbon and mTiO 2. As a consequence, the double conductive structure Fe 3 O 4 @mTiO 2 /C photocatalyst displays prominent photocatalytic activity in degradation of BPA under visible light. Furthermore, the photocatalyst not only was recycled easily to reduce the secondary pollution of the environment but also had a superior stability. This work may provide a new inspiration toward constructing dual sensitization and double conductive structure with other semiconductor photocatalyst to effectively improve the photocatalytic activity under visible light for practical application. [ABSTRACT FROM AUTHOR]

The ternary conductive Ppy@Ag/g-C 3 N 4 composite photocatalysts was successfully synthesized by polymerization process and surface polymerization technique. And the as-prepared Ppy@Ag/g-C 3 N 4 sample exhibited the higher photocatalytic activity for various pollutant (MO, DM, TC, CIP, GFLX and EH) remove than that of pure g-C 3 N 4 and Ag/g-C 3 N 4 under visible light irradiation. It mainly originated from the Ag nanoparticles anchored between g-C 3 N 4 and Ppy acted as electron transfer mediator that facilitated the charge carrier separation and then expending the lifetime of the carriers. Meanwhile, the obtained Ppy@Ag/g-C 3 N 4 sample also showed a relatively good recycling stability which was the crucial factor for photocatalyst practical application. This work provided a new facile strategy for improving photo-degradation activity of g-C 3 N 4 photocatalyst. [ABSTRACT FROM AUTHOR]

• BiVO 4 /MoS 2 @GO (MBG) is prepared by an in-situ hydrothermal method. • The optimal working conditions are determined by orthogonal analysis. • The heterojunction formed between BiVO 4 and MoS 2 promotes charge separation. • MBG photocatalytic degradation rate is 13 and 2.4 times higher than MoS 2 and BiVO 4. • Electron transmission channels promote the separation of photogenerated carriers. The low separation efficiency of photogenerated electron-hole pairs is the main factor that restricts the performance of photocatalysts. In this paper, BiVO 4 /MoS 2 @GO composites were synthesized by in-situ hydrothermal method, and the experimental conditions were optimized by orthogonal test to improve the separation rate of photogenerated electron-hole pairs. The as-prepared BiVO 4 /MoS 2 @GO composites exhibited a Z-scheme heterojunction, which effectively promoted photogenerated electron-hole pair separation. In addition, the separation rate of photogenerated electron-hole pairs was effectively improved by using graphene oxide nanosheets as electron transport channels. This enhanced the utilization rate of photogenerated carriers in the BiVO 4 /MoS 2 @GO composites, thus improving the photocatalytic activity. The photocatalytic tetracycline degradation rate of the as-prepared BiVO 4 /MoS 2 @GO in the best working conditions was 13 times and 2.4 times higher than that of MoS 2 and BiVO 4. This work provides new insight into the preparation of photocatalysts with an efficient electron transfer mechanism. [Display omitted] [ABSTRACT FROM AUTHOR]

Imprinted P25@IL nanoreactor prepared in aqueous-phase via stable interaction forces between IL and LEV exhibited excellent selectivity and photocatalytic ability. [Display omitted] • Imprinted P25@IL nanoreactor is obtained by aqueous-phase microwave polymerization strategy. • The strong interactions between IL and LEV overcome the interference of water molecules. • Type II heterojunction formed between IL and P25 improves the photocatalytic activity. • Imprinted cavity enhances the selective degradation ability. Common molecular imprinted photocatalysts are usually prepared in highly toxic organic solvent medium, which will be disturbed by water molecules and swelling differences when used for selective recognition in the aqueous phase. In this study, an ionic liquid (IL) was used as the functional monomer and functionalized P25@IL heterojunction molecular imprinted photocatalytic nanoreactor, referred to as imprinted P25@IL nanoreactor, were prepared via the aqueous-phase microwave polymerization strategy. Imidazole-based IL cations can provide π electron clouds, and side chains are easily functionalized and modified, resulting in strong interactions such as π-π and ion dipoles being formed between IL and levofloxacin hydrochloride (LEV), which can overcome the interference of water molecules and achieve better selective adsorption and degradation of LEV in aqueous medium. The selectivity coefficient of imprinted P25@IL nanoreactor relative to P25 and functionalized P25@IL heterojunction molecular non-imprinted photocatalyst (non-imprinted P25@IL photocatalyst) were 2.69 and 2.26, respectively. More importantly, with the formation of IL-P25 heterojunction and surface imprinted layer, the photocatalytic performance of imprinted P25@IL nanoreactor was 2.33 times higher than that of P25. Our findings offer a novel approach to the synthesis of water-soluble functional monomers and the aqueous-phase synthesis of molecular imprinted photocatalytic materials. [ABSTRACT FROM AUTHOR]

The magnetic controllable imprinted photocatalyst fabricated by photoinduced surface imprinted technique exhibits good controllable and selective degradation ability. • MCIP with good recyclability is obtained by photoinduced surface imprinted technique. • MCIP has good controllable degradation ability due to the existence of PNIPAM. • MCIP exhibits good selectivity to ciprofloxacin due to the existence of imprinted cavity. In this article, magnetic controllable imprinted photocatalyst (MCIP) was fabricated by photoinduced surface imprinted technique. The degradation rate of ciprofloxacin by MCIP at 20 °C (70.85 %) was higher than that at 40 °C (55.06 %), compared with other materials, MCIP exhibited good controllable degradation ability due to the state of expansion or contraction at different temperatures. Moreover, when the temperature was 20 °C (or 40 °C), the coefficient of selectivity of MCIP to magnetic controllable non-imprinted photocatalyst (MCNIP) was 2.40 (or 2.80) in the single solution, and the coefficient of competitiveness of MCIP to MCNIP was 1.40 (or 1.37) in the mixed solution, above results indicated that MCIP exhibited good selective degradation ability. This work made the functional application of photocatalyst have a better prospect. [ABSTRACT FROM AUTHOR]