Designing highly efficient photocatalyst for the valorization of CO_(2) is an ideal strategy to reduce greenhouse gas emissions and utilize solar energy.In this study,a S-scheme heterojunction photocatalyst is fabrica...Designing highly efficient photocatalyst for the valorization of CO_(2) is an ideal strategy to reduce greenhouse gas emissions and utilize solar energy.In this study,a S-scheme heterojunction photocatalyst is fabricated by solvothermal impregnation of ZnO on W_(18)O_(49) for photocatalytic CO_(2) N-formylation of aniline.The localized surface plasmon resonance effect of W_(18)O_(49) improves the absorption capacity for long-wave light significantly,and the hot electrons generated in W_(18)O_(49) with a high energy can migrate to the conduction band of ZnO and thus enhance the photocatalytic reduction ability.Meanwhile,the S-scheme heterojunction facilitates the separation of photoinduced charge carriers and preserves the redox ability of W_(18)O_(49)/ZnO composite photocatalyst.The conversion of aniline reaches 99.1%after 5 h reaction under visible light irradiation at room temperature with an N-formylaniline selectivity of 100%.A possible photocatalytic reaction mechanism is proposed.This study paves a promising way for the design of highly efficient photocatalyst and the sustainable utilization of CO_(2).展开更多
文摘Designing highly efficient photocatalyst for the valorization of CO_(2) is an ideal strategy to reduce greenhouse gas emissions and utilize solar energy.In this study,a S-scheme heterojunction photocatalyst is fabricated by solvothermal impregnation of ZnO on W_(18)O_(49) for photocatalytic CO_(2) N-formylation of aniline.The localized surface plasmon resonance effect of W_(18)O_(49) improves the absorption capacity for long-wave light significantly,and the hot electrons generated in W_(18)O_(49) with a high energy can migrate to the conduction band of ZnO and thus enhance the photocatalytic reduction ability.Meanwhile,the S-scheme heterojunction facilitates the separation of photoinduced charge carriers and preserves the redox ability of W_(18)O_(49)/ZnO composite photocatalyst.The conversion of aniline reaches 99.1%after 5 h reaction under visible light irradiation at room temperature with an N-formylaniline selectivity of 100%.A possible photocatalytic reaction mechanism is proposed.This study paves a promising way for the design of highly efficient photocatalyst and the sustainable utilization of CO_(2).
