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Azo dyes are difficult to degrade, dark in color and toxic in the aqueous environment, which will harm the ecological environment and human health if left untreated. Photocatalytic technology has a wide range of applications in the treatment of printing and dyeing wastewater; in the present study, nano Zr–BiOI/GO photocatalytic composites were prepared by a hydrolysis method using Bi(NO 3) 3 –5H 2 O and ZrOCl–8H 2 O as precursors and GO as carriers. The structure and properties of the samples were characterized by combining test methods such as XRD, FESEM, TEM, XPS, and UV–vis. Congo red (CR) was used as the target pollutant to assess the photocatalytic performance of the prepared materials. The results showed that the specific surface area of 10 % Zr–BiOI/GO increased from 21.98 m2/g to 152.79 m2/g, and the average particle size decreased from 21.61 nm to 17.75 nm compared with that of BiOI. Compared with BiOI, the light-absorption threshold of 10 % Zr–BiOI/GO was increased from 640.6 to 726.4 nm, and the forbidden bandwidth was decreased from 1.94 eV to 1.71 eV. In addition, the nanocomposites exhibited excellent stability and removal of organic dyes and could be used as a potential photocatalyst for water remediation under visible light. The removal of CR by 10 % Zr–BiOI/GO composite was 95.42 % at 120 min. The photocatalytic degradation process of Zr–BiOI/GO conformed to the first-order kinetic model, and the correlation coefficient of the kinetic curve of 10 % Zr–BiOI/GO was 0.9465 and the reaction rate constant was the greatest at 0.0221 min−1. Superoxide radicals [·O 2 −] play a major role in photocatalytic activity. The results indicate that nanocomposites are a promising candidate for photocatalytic degradation of water pollutants. In this paper, Zr–BiOI/GO photocatalytic composites were prepared by a simple hydrolysis method, which possessed higher specific surface area and narrower forbidden bandwidth than pure BiOI, and could remove up to 95.42 % of Congo red (CR) solution under visible light, in addition to the high stability and recycling rate of Zr–BiOI/GO. [Display omitted] • The pore structures of Zr–BiOI/GO photocatalytic materials prepared by hydrolysis method were well developed. • The maximum removal of Congo red by mesoporous Zr–BiOI/GO photocatalytic material was 96.84 %. • Paradigm of Zr–BiOI/GO resource recovery and wastewater treatment was provided. • Long-term experiments were conducted with excellent stability. [ABSTRACT FROM AUTHOR]

The perturbation in the environment by the discharge of toxic dyes in wastewater is a matter of concern and there is an urgent need to impart the balance. These organic dyes can be removed via catalytic degradation, adsorption or membrane filtration. In this study, we have developed a Zn(II)-based coordination polymer (CP) [Zn(bpyp)(HL-NO 2) 2 ] n (1) by solvothermal method using 2,5-bis(pyrid-4-yl)pyridine (bpyp) and 4-nitrobenzoic acid (HL-NO 2) as organic linkers. The single crystal X-ray diffraction depicts that the Zn(II) adopts a tetragonal coordination environment and 1D linear chains are linked together to form a 2D framework via hydrogen bonding and π-π interactions. Methyl orange (MO), methyl violet (MV), methyl blue (MB) and rhodamine B (RhB) were investigated for photocatalytic degradation in the presence of visible light. Synthesized 1 shows 82% degradation of RhB dye. The Hirshfeld surfaces study demonstrated that these synthesized coordination polymers contain various forms of intermolecular contacts (C⋯C, H⋯C, H⋯H, and O⋯H). The degradation efficiency of organic dye by 1 was discussed. The active species involved in the degradation of Rh B has been assessed using trapping experiments. [Display omitted] • [Zn(bpyp)(HL-NO 2) 2 ] n (1) were synthesized. • The degradation efficiency of RhB by 1 was very high compared to other dye. • The active species involved in the degradation of Rh B has been assessed using trapping experiments. • Hirsfeld d norm surface of carboxylate are mainly covered by H⋯O/O⋯H, C⋯H/H⋯C and H⋯H interactions. [ABSTRACT FROM AUTHOR]

In order to improve the visible light catalytic activity of TiO 2 , the TiO 2 @g-C 3 N 4 (TCN) composite catalysts with three-dimensional porous structure and rich active sites were prepared by hydrothermal method and calcination method orderly. The synthesized TCN composites microstructures were thoroughly characterized and their performance for the photocatalytic degradation of organic dyes was investigated. The results show that the prepared composites formed the heterojunctions with a core-shell structure, which can effectively broaden the absorption spectrum of TiO 2 to visible light region. In the degradation experiments, the TCN composites exhibited excellent photocatalytic degradation effect on organic dyes, which can reach 99.65% under visible light irradiation for 2 h. The strong acid condition was benefit to the catalytic process. After five cycles of testing, the degradation efficiency of organic dyes can still maintain at 95.62% level, which indicate that the TCN composites had excellent visible light catalytic activity and reusability. [Display omitted] • The TiO 2 with three-dimensional porous structure and rich active sites were prepared by hydrothermal method. • The melamine can penetrate into the interior of TiO 2 microsphere to form TCN heterojunctions with core-shell structure. • The TCN composites with core-shell structure heterojunctions can degrade organic dyes efficiently. • The TCN composites have good stability and repeatability. [ABSTRACT FROM AUTHOR]

A two-dimensional Cu(II) MOF {[Cu 2 (OH)(mtrb)(suc) 1.5 (H 2 O) 2 ]·H 2 O·0.5DMA} n (Cu(mtrb)) (mtrb = 1,3-bis((1,2,4-triazol-4-ylmethyl)benzene, H 2 suc = succinic acid, DMA = N, N-dimethylacetamide) was obtained using solvothermal synthesis. Cu(mtrb) has a two-dimensional (6,3) network with the point symbol of 63. A series of Cu(mtrb)/wt%g-C 3 N 4 composites were obtained by coupling Cu(mtrb) and semiconductor g-C 3 N 4 to give heterojunctions by the grinding method. The composite samples were investigated with XRD, FT-IR, SEM, EDS, XPS, TGA, UV–Vis, PL and EIS to analyze the purity, functional groups, surface morphology, elemental distribution, valence electron, thermal stability, visible-light absorption and electron-hole pair separation status. Photocatalytic degrade methylene blue (MB), methyl orange (MO) and rhodamine B (RhB) were investigated. Cu(mtrb) can degrade 93.6% MB in 30 min, 87.0% MO in 135 min and 92.0% RhB in 90 min. Cu(mtrb)/10%g-C 3 N 4 could degrade 96.2% MB in 15 min, 87.0% MO in 45 min and 92.3% RhB in 60 min, respectively. The coupling of Cu(mtrb) with g-C 3 N 4 resulted in the formation of heterojunctions in Cu(mtrb)/wt%g-C 3 N 4 composites and inhibited the rapid recombination of electron-hole pairs. The main reactive species for MB degradation were •OH and h+. Cu(mtrb) and Cu(mtrb)/10%g-C 3 N 4 composites are the good photocatalysts. A 2D Cu-MOF Cu(mtrb) and a series of Cu(mtrb)/wt%g-C 3 N 4 composites were synthesized and characterized. Cu(mtrb) can degrade 93.6% MB in 30 min, 87.0% MO in 135 min and 92.0% RhB in 90 min. Cu(mtrb)/10%g-C 3 N 4 could degrade 96.2% MB in 15 min, 87.0% MO in 45 min and 92.3% RhB in 60 min, respectively. The main reactive species for MB degradation were •OH and h+. Cu(mtrb) and Cu(mtrb)/10%g-C 3 N 4 are the good photocatalysts. [Display omitted] • A Cu-MOF Cu(mtrb) and its g-C 3 N 4 composite were synthesized and characterized. • Cu(mtrb) can degrade 93.6% MB in 30 min, and Cu(mtrb)/10%g-C 3 N 4 could degrade 96.2% MB in 15 min. • Cu(mtrb)/10%g-C 3 N 4 could degrade 87.0% MO in 45 min and 92.3% RhB in 60 min. • The main reactive species for MB degradation were.•OH and h+. • A Cu-MOF Cu(mtrb) and Cu(mtrb)/10%g-C 3 N 4 composite are the good photocatalysts. [ABSTRACT FROM AUTHOR]

Four novel Co(II)-MOFs based on the 3,3′-azodibenzoic acid (H 2 L), namely [CoL (bimb) 0.5 ] n (1), {[CoL (bimmb)]·DMF} n (2), [CoL (bimmb) 0.5 ] n (3), and [CoL (bbibp)] n (4) (bimb = 1,4-bisimidazole, bimmb = 4-bis(imidazole-1-ylmethyl)benzene, bbibp = 4,4′-bis(benzoimidazo-1-yl)biphenyl and DMF = N, N′-dimethylformamide) have been synthesized under solvothermal conditions and characterized by elemental analysis, IR spectra, powder X-ray diffraction (PXRD), thermogravimetric (TG) analysis and single crystal X-ray diffraction. Single crystal X-ray diffraction analysis shows that complex 1 and complex 3 possesses the same structure as uninodal 6-connected 3D (three-dimensional) pcu topology framework with the point symbol (412.63), whereas complex 2 possesses an uninodal 3-connected hcb topology framework with the point symbol (63) and complex 4 displays a 4-connected sql topology framework with the point symbol of (44.62). In addition, the photocatalytic degradation properties of the four complexes have been investigated. Significantly, complex 4 is the best photocatalyst for the degradation of three organic dyes (MV/MB/RhB). Complex 2 is the good photocatalyst for the degradation of two organic dyes (RhB/MB). Complex 3 is the good photocatalyst for the degradation of two organic dyes (MV/MB) and complex 1 is the good photocatalyst for the degradation of only one organic dyes (MV). Image 1 [ABSTRACT FROM AUTHOR]

Crystalline organic hybrid metal chalcogenides have exhibited effective photocatalytic degradation ability for organic pollutants. However, few strategies have been applied to enhance its inherent photocatalytic degradation activity. Here, we used an organic hybrid indium sulfide [In 8 S 13 (S) 1/2 (SH)][In 4 S 6 (S 3) 1/2 (SH)](TMDPH 2) 5 (HCF-1) (TMDP = 4,4′-trimethylenedipiperidine) as pristine material, by immersing HCF-1 into AgNO 3 solution, the surface of HCF-1 crystal was decorated by Ag+ ions via electrostatic interaction. Compared with the pristine HCF-1, the as-modified Ag@HCF-1 exhibited enhanced photocatalytic degradation performance for organic dyes (RhB and MO) and antibiotics (TC and ENR). The decoration of Ag+ ions on the surface of HCF-1 can broaden the range of light absorption, and promote the separation of photo-generated carriers, and thus boost the photocatalytic activity. In addition, photocatalytic mechanism was studied by free radical capture experiments, which proved the dominant roles of h+ and •O 2 − in the degradation process. [Display omitted] • The surface of an organic hybrid indium sulfide was modified by Ag + ion decoration. • Ag@HCF-1 displayed enhanced photocatalytic degradation ability for organic dyes and antibiotics. • Mechanism study proved the dominant roles of h+ and.•O 2 − in the degradation process. [ABSTRACT FROM AUTHOR]

Metal organic framework (MOFs) have been attracted a great attention as a new type photocatalysts due to their unique properties. In this work, the new hybrid photocatalyst based on fabrication hybrid structures between MIL-100(Fe) and Bi 2 S 3 (MIL-100(Fe)@Bi 2 S 3 ) were synthesized via simple hydrothermal method. The photocatalytic degradation of Rhodamine B (RhB) over the as-prepared samples showed that the hybrid photocatalyst samples had higher photocatalytic performance compared to the individual components (MIL-100(Fe) and Bi 2 S 3 ). The higher photocatalytic performance of the hybrid photocatalysts was proved by electrochemical and photoelectrochemical analysis such as electrochemical impedance spectroscopy (EIS) and also photocurrent measurement. In addition, the possible photocatalytic mechanism based on the optical, photoelectrochemical and quenching tests was proposed. [ABSTRACT FROM AUTHOR]

The rational design and preparation of low-cost and visible-light-active catalysts for photodegradation of methylene blue (MB) have been regarded as an efficient way for the utilization of solar energy to address the environmental issues. Herein, in this work, a novel MoS 2 /CdS/Bi 2 MoO 6 ternary Z-scheme heterojunction to be applied in pollutant photodegradation is fabricated via hydrothermal method. Under visible light illumination, the as-prepared 2.4% MoS 2 /CdS/Bi 2 MoO 6 -2.0 composites display desirable photocatalytic activity with removal efficiency of 96.0% towards MB and the total organic carbon removal rate of 73.5% within 120 ​min. The apparent reaction rate constant of 2.4% MoS 2 /CdS/Bi 2 MoO 6 -2.0 (0.0256 min−1) is approximately 16 and 5.2 times higher than those of pure Bi 2 MoO 6 (0.0016 min−1) and CdS (0.0049 min−1), respectively. Meanwhile, the as-prepared ternary photocatalyst possess favorable universality. Combined with a series of characterization results, the enhanced photocatalytic activity of 2.4% MoS 2 /CdS/Bi 2 MoO 6 -2.0 is mainly attributed to the successful formation of the ternary Z-scheme photocatalysts, which could boost the separating/transferring efficiency and reduction/oxidation ability of charge carriers. In addition, the cycling experiments demonstrate that 2.4% MoS 2 /CdS/Bi 2 MoO 6 -2.0 possesses favorable stability and recoverability. Overall, this work put forward a simple strategy for synthesizing visible-light-active ternary Z-scheme photocatalytic materials. MoS 2 /CdS/Bi 2 MoO 6 ternary Z-scheme heterojunction has been successfully prepared via hydrothermal method, which exhibit the greatest photocatalytic activity with 96.0% of MB removal efficiency under visible light illumination. [Display omitted] • Preparation of MoS 2 /CdS/Bi 2 MoO 6 Z-scheme heterojunctions via a hydrothermalmethod • MoS 2 /CdS/Bi 2 MoO 6 heterojunctions inhibit the recombination of photogenerated carries. • MoS 2 /CdS/Bi 2 MoO 6 exhibits high photocataltic degradation efficiency. [ABSTRACT FROM AUTHOR]

A cube-like porous ZnO architecture was synthesized by direct two-step thermolysis of a zinc-based metal-organic framework [(CH 3 ) 2 NH 2 ][Zn(HCOO) 3 ]. The obtained ZnO microcube was characterized by powder X-ray diffraction, scanning electron microscopy, transmission electron microscopy and nitrogen adsorption and desorption isotherms. The mesoporous ZnO microcube was comprised by many nanoparticles, and inherited the cube shape from [(CH 3 ) 2 NH 2 ][Zn(HCOO) 3 ] precursor. With large surface area and mesoporous structure, the ZnO microcube exhibits excellent photocatalytic activities against methyl orange (MO) and rhodamine B (RhB) under UV irradiation, and the degradation rates reached 99.7% and 98.1% within 120 min, respectively. [ABSTRACT FROM AUTHOR]

A Cu(II) coordination polymer {[Cu(tmpe) 0.5 (1,2-bdc)]·2CH 3 CN} n (Cu(tmpe)) (tmpe ​= ​1,1,2,2-tetra[4-(2-methyl-1H-imidazole-1-yl)phenyl]ethylene, 1,2-bdc ​= ​1,2-benzenedicarboxylate) was prepared. Cu(tmpe) has the (4,4)-connected 2D structure exhibiting the kgm topology (32·62·72) 2. The series of attached g-C 3 N 4 composites Cu(tmpe)/g-C 3 N 4 were prepared with grinding method and the morphology, functional groups, chemical composition, thermal stability, band gap, optical properties and electrochemical performances of prepared materials were comprehensively characterized with XRD, SEM, HRTEM, EDX, FTIR, XPS, TGA, UV–Vis, PL and electrochemical tests. Cu(tmpe)/10%g-C 3 N 4 had the highest catalytic efficiency for degradation of methylene blue (MB) in a series of Cu(tmpe)/wt%g-C 3 N 4 (w ​= ​5, 10, 15, 20). The photocatalytic study of Cu(tmpe) and its composite Cu(tmpe)/10%g-C 3 N 4 showed high efficiencies of decomposition methylene blue (MB), methyl orange (MO), methyl violet (MV), and rhodamine B (RhB) with the rates were in the order of MB ​> ​MO ​> ​MV ​> ​RhB. Cu(tmpe) and Cu(tmpe)/10%g-C 3 N 4 could degrade 95.4% and 93.6% of MB after 60 ​min and 30 ​min, respectively. The photocatalytic possible mechanism of the degradation process was studied with trapping experiments as well as Mott-Schottky tests. Cu(tmpe) and Cu(tmpe)/10%g-C 3 N 4 composite are good photocatalytic materials for removing organic dye pollutants from wastewater. A 2D Cu(II) coordination polymer Cu(tmpe) and its heterostructural Cu(tmpe)/g-C 3 N 4 composites were prepared and characterized. Cu(tmpe) and Cu(tmpe)/10%g-C 3 N 4 are the good photocatalytic materials. [Display omitted] • A 3D Cu(II) MOF Cu(tmpe) and its heterostructual composite Cu(tmpe)/g-C 3 N 4 were synthesized and characterized. • The degradation rate of MB for Cu(tmpe)/10%g-C 3 N 4 could reach 93.6% within 30 ​min. • The rates for Cu(tmpe)/10%g-C 3 N 4 are 91.9%, 94.2% and 92.8% of MO, MV and RhB within 45, 60 and 75 ​min, respectively. • Cu(tmpe) and Cu(tmpe)/10%g-C 3 N 4 are the good photocatalytic materials. • The.•OH for MB and •O 2 − for MO were the primary active matters. [ABSTRACT FROM AUTHOR]

One 3D Cu(II)-based metal-organic framework {[Cu 3 (tmpa) 2 (1,2,3-btc) 2 (H 2 O) 2 ].14H 2 O.2DMF} n (Cu(tmpa)) (tmpa ​= ​tris(4-(2-methyl-1H-imidazole-1-yl)phenyl)amine, 1,2,3-H 3 btc ​= ​1,2,3-benzenetricarboxylic acid) was prepared by hydrothermal method and characterized. Cu(tmpa) exhibits (3,3,4)-connected 3D topology showing point symbol of (6·8·9) 2 (6·8·10) 2 (62·82·102). The heterostructural Cu(tmpa)/CN composites with different mass proportions were prepared and characterized by XRD, FT-IR, SEM, EDS, UV-DRS, TGA, PL and EIS. The photocatalytic activities of Cu(tmpa) and Cu(tmpa)/20%CN composite to degrade methylene blue (MB), methyl violet (MV), malachite green (MG), and Congo red (CR) were investigated. The photocatalytic degradation of MB by Cu(tmpa)/CN with different mass proportions was studied, and the catalytic conditions catalyst dosage, H 2 O 2 concentration and initial pH value with were optimized. The degradation rate of MB for Cu(tmpa)/20%CN could reach 92.0% within 20 ​min. Cu(tmpa)/20%CN could also degrade 92.0%, 92.9% and 98.2% of MV, MG and CR in 60 ​min, 35 ​min and 3 ​min, respectively. The degradation mechanisms for MB and CR were studied. The enhanced photocatalytic activities of Cu(tmpa)/CN composite might be attributed not only to the vigorous visible-light absorption of Cu(tmpa) , but also to the heterojunction formed by doping g-C 3 N 4 , which accelerates the divorce and movement of photogenerated charges compared to Cu(tmpa). The holes were the primary active matters in the degradation for MB. The holes and superoxide radicals were the main reactive matters in degradation of CR. Cu(tmpa) and Cu(tmpa)/20%CN are good photocatalytic materials. [Display omitted] • A 3D Cu(II) MOF Cu(tmpa) and its heterostructual g-C 3 N 4 composite Cu(tmpa)/CN were synthesized and characterized. • The degradation rate of MB for Cu(tmpa)/20%CN could reach 92.0% within 20 ​min. • Cu(tmpa)/20%CN could degrade 92.0%, 92.9% and 98.2% of MV, MG and CR in 60 ​min, 35 ​min and 3 ​min, respectively. • Cu(tmpa) and Cu(tmpa)/20%CN are the good photocatalytic materials. • The holes were the primary active matters in degradation for MB. [ABSTRACT FROM AUTHOR]

Organic pollutants, particularly nitrogen-rich explosives and carbon-rich dyes are generally degraded by different photocatalysts under either visible or ultraviolet light, leading to substantial waste and cost. Three photocatalysts with Z-scheme structures, Ag@AgBr/Cu 2 O-1, Ag@AgBr/Cu 2 O-2, and Ag@AgBr/Cu 2 O-3, are designed and synthesized employing a simple solvothermal and photoreduction technique to develop advanced photocatalyst materials that can degrade nitro substances under ultraviolet (UV) irradiation and organic dyes under visible-light irradiation. The structural characterization of Ag@AgBr/Cu 2 O-2 as determined through various spectroscopic techniques (e.g. XPS, XRD and TEM) reveal that the Z-scheme photocatalysts are composed of Ag, Cu 2 O and AgBr nanospheres with particle size less than 100 ​nm, while nano-Ag and nano-AgBr coupled to the surface of the Cu 2 O microspheres. Further investigations demonstrate that these photocatalysts exhibit a good UV–visible absorption range (200–800 ​nm) and outstanding photocatalytic degradation activity for two typical organic pollutants. Among them, Ag@AgBr/Cu 2 O-2 achieve a 100% degradation of trinitrotoluene (a common explosive) in 30 ​min under UV radiation, and a 99.2% degradation of rhodamine B (a typical dye) in 60 ​min under visible-light irradiation in the absence of UV light, demonstrating remarkable dual-band adaptability. Moreover, Ag@AgBr/Cu 2 O-2 displays superior stability, with a degradation rate of up to 85% after four cycles. The putative photocatalytic reaction mechanism is proposed based on the radical trapping experiment. [Display omitted] • The newly reported Z-scheme photocatalysts Ag@AgBr/Cu 2 O show good light absorption over the UV–visible range (200–800 ​nm). • These Z-scheme photocatalyst can degrade different organic pollutants under ultraviolet and visible-light irradiation. • The new Z-scheme photocatalyst can degrade at least 99% of trinitrotoluene and rhodamine B within 1 ​h in the UV–visible-light irradiation. • The reaction rate constant of Ag@AgBr/Cu 2 O-2 is 1.38 times that of Ag@AgBr and 74 times that of Cu 2 O. [ABSTRACT FROM AUTHOR]

At present, a large number of pathogenic microorganisms and organic dyes pollute water resources and have an impact on human health. Photocatalysis is a promising method for sterilization and degradation. But research on the effective use of sunlight for photocatalytic inactivation of bacteria is limited. Sea urchin-like WO 3-x was synthesized by hydrothermal method. Ag nanoparticles (Ag NPs) supported on WO 3-x nanospheres were prepared by the photoreduction method to obtain Ag/WO 3-x composites, and the reduction time could control the loading amount. The relevant properties of the material were characterized in detail. The photodegradation of Rhodamine B (Rhb) by WO 3-x and Ag/WO 3-x was carried out under simulated sunlight. The results shown that the photocatalytic degradation rate of Ag/WO 3-x was about 69%, which was about twice that of WO 3-x. The bactericidal activity of WO 3-x and Ag/WO 3-x against Escherichia coli(E.coli) and Staphylococcus aureus(S. aureus) was investigated. The synthesized Ag/WO 3-x composites exhibited more than 97% bactericidal rate against both model bacteria under 2 ​h of light irradiation. The excellent photocatalytic degradation and bactericidal properties of Ag/WO 3-x composites were due to the enhanced photocatalytic performance of the composites after WO 3-x loaded with Ag NPs. Sea urchin-like WO 3-x and Ag/WO 3-x were synthesized by a hydrothermal method. The results showed that the photocatalytic performance of WO 3-x was improved after loading with Ag NPs. Ag/WO 3-x have the potential to be used as photocatalysts to treat wastewater containing organic dyes and pathogenic microorganisms. [Display omitted] • Sea urchin-like WO 3-x and Ag NPs-loaded WO 3-x were synthesized by hydrothermal method. • Photocatalytic degradation and sterilization of Ag/WO 3-x were investigated. • Ag/WO 3-x has excellent photocatalytic degradation and bactericidal properties. [ABSTRACT FROM AUTHOR]

The present study, highlights essentially a phenomenon rarely encountered in NiFe 2 O 4 nanoparticles self-assembled in the presence of organic azo dye (i.e. Methyl orange). To the best of our knowledge, NiFe 2 O 4 nanoparticles with fibrous morphology is unprecedent. Unexpected features of solid-state morphology changes from zero-dimensional to quasi one-dimensional and back again were evaluated by applying a wide range of complementary physico-chemical characterization techniques to unequivocally assess the nature of the self-assembly process. Scanning electron microscopy reveals the reversibility of the above-mentioned process, under various applied conditions. Zero-dimensional nickel ferrite nanoparticles (as-synthesized) are assembled into quasi one-dimensional fibers, uniformly distributed in all three directions by adsorption of Methyl orange (MO) dye, with texture preserved after the photocatalytic process, and finally it returns to the initial appearance (zero dimensional) by applying a thermal treatment. The presented results may contribute to photocatalyst development by in/ex-situ tuning the morphology of the material, which allows active sites to spread over a wide internal surfaces and pores which, in turn, enhance the photodegradation ability of the catalyst. Materials at nanoscale level with morphology-controlled features are of great interest and significance for the design and photocatalyst development. In the present study, based on the experimental data, a possible formation mechanism of unprecedent solid nanofibers of nickel ferrite is proposed. Zero-dimensional nickel ferrite nanoparticles are assembled into nanofibers uniformly distributed in all three directions. Image 1 [ABSTRACT FROM AUTHOR]