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[Display omitted] • Stable functional photocatalyst of BTO@Bi 2 S 3 /PU was successfully fabricated. • BTO@Bi 2 S 3 /PU possess excellent activity for oxytetracycline photodegradation. • Metal ions redox boosted the charge transfer of Z-scheme from BTO to Bi 2 S 3. • ·O 2 − and h+ primarily dominate the photodegradation mechanism of oxytetracycline. • Eco-toxicity tests prove the environmental-friendly of photocatalytic process. Inspired by the high sustainability, energy saving, cleanliness of photocatalysis (PC) with respect to antibiotics decomposition, we developed a stable, highly efficient Bi 2 Ti 2 O 7 @Bi 2 S 3 /polyurethane (BTO@Bi 2 S 3 /PU) photocatalytic system. It exhibited the best degradation performance with the removal of 82.08 % oxytetracycline (OTC) within 180 min under the optimal reaction parameters. Systematic characterization of BTO@Bi 2 S 3 /PU revealed its wider light-harvest capacity, higher electron–hole (e−–h+) separation efficiency, lower interface resistance, and better redox potential in heterojunction. Based on electrochemical characterization and density functional theory calculation, the construction of Z-scheme BTO@Bi 2 S 3 photocatalyst substantially optimized the band structure. Moreover, the redox cycles of Bi3+/Bi5+ and Ti4+/Ti3+ further enhanced the charge transfer rate during the photoactivation process. For the OTC photodegradation pathways, ·OH, h+, ·O 2 −, and 1O 2 dominated the pollutant decomposition and the toxicity of intermediates were decreased. Overall, the BTO@Bi 2 S 3 /PU photocatalytic system may provide a universal and stable technique for advanced photoheterojunction applications and wastewater purification. [ABSTRACT FROM AUTHOR]

[Display omitted] • The preparation methods influenced properties of biochar used in CWs. • Biochar addition improved transformation of pollutants in CWs via various pathways. • Biochar addition significantly enhanced common and emerging pollutants removal in CWs. • A novel Fe-C micro-electrolysis substrates boosted treatment performance of CWs. Traditional constructed wetlands (CWs) still face tremendous challenges, including low nitrogen removal, unstable operation, undesired refractory substances degradation and poor reoxygenation capacity, in their practical applications. Recently, biochar has been regarded as a promising alternative substrate in CWs to enhance pollutants removal via inner environment adjustment, plants growth facilitating and biotoxins adsorption. Based on VOSviewer analysis, this study comprehensively summarizes the mechanisms, application, and performances of biochar addition in CWs. First, physicochemical properties of biochar, including pore sizes/pore volumes, surface aeras, functional groups and chemical compositions, with different preparation methods were comparatively analyzed. Then, the mechanisms and applications of (modified) biochar in CWs and its improving effects on typical pollutants (such as nitrogen, phosphorus, complex organics and heavy metals) removal were summarized. Moreover, the mechanisms and strengthened effect of novel Fe-C micro-electrolysis substrates on pollutants reduction in CWs was also elucidated. Finally, the prospectives and challenges were proposed to offer a deep insight in biochar for its engineering application in CWs. [ABSTRACT FROM AUTHOR]

[Display omitted] • The epitaxial growth of BaZr 0.15 Ti 0.85 O 3 thin films on Si was realized by La 0.67 Sr 0.33 MnO 3 /CeO 2 /YSZ buffer layer. • Energy storage performance of the Si-integrated film Capacitors can be significantly improved by the buffer layer. • High temperature performance can be further optimized by an extra layer of graphene. With the rapid development of advanced electronic devices towards miniaturization and integration, silicon integrated lead-free ferroelectric film capacitors have attracted extensive attention due to their excellent energy storage performance and fast charge/discharge speed. In this study, the BaZr 0.15 Ti 0.85 O 3 (BZT15) film capacitors have been epitaxially integrated on Si (0 0 1) substrate with the buffer layers of Graphene/La 0.67 Sr 0.33 MnO 3 /CeO 2 /Y 2 O 3 -stabilized ZrO 2 (G/L-C-Y). The highly epitaxial crystalline quality improves significantly the energy storage performance. The layer of G has been found to further improve the high temperature energy storage performance due to its heat dissipation effect. The energy storage density (W re) of the BZT15 film capacitor with the buffer layers reaches 112.35 J/cm3 with energy storage efficiency (η) of 76.7 % at room temperature, which is about 55.29 % and 9.18 % higher than that of the BZT15 film capacitor without buffer layers, respectively. Moreover, the BZT15 film capacitor with the buffer layer shows an ultra-high W re of 70.36 J/cm3 and an ultra-high η of 81.22 % at 200 °C, which are 74.55 % and 17.13 % higher than that of BZT15 film capacitor without buffer layer. More importantly, the fluctuation of W re and η of optimized BZT15 film capacitor is only 8.85 % and 1.30 % in the wide temperature range from −100 to 200 °C, respectively. Our studies provide an effective multi-strategy approach combining interface designing and thermal management for the epitaxially integration of dielectric film capacitors on Si substrates to obtain ultra-high energy storage performance in ultra-wide working temperature. [ABSTRACT FROM AUTHOR]