![]() ![]() ![]() The ZnO–Cu–CdS catalyst manifests an H 2 evolution efficiency of 5579 μmol h −1 g −1, which is 169, 41, 3.9, and 3.5 times as high as those of ZnO, CdS, ZnO 0.5CdS 0.5, and Cu 0.1ZnO 0.9 catalysts. The MB degradation with this catalyst is 84, 21, 4.8, and 2 times as high as those of ZnO, CdS, ZnO 0.5CdS 0.5, and Cu 0.1ZnO 0.9 catalysts. Within 60 min of visible light exposure, about 97% of methylene blue (MB) is degraded with a degradation rate constant of 0.042 min −1 for the ZnO 0.45Cu 0.1CdS 0.45 catalyst. Herein, we have integrated ZnO and CdS nanoparticles through Cu as a solid-state electron mediator to design a ZnO–Cu–CdS Z-scheme heterosystem via a sol–gel route and further tested this as a photocatalyst for dye degradation, H 2 evolution, and CO 2 reduction. ![]() Solar photocatalysis has emerged as a pollution-free and inexhaustible technique that has been extensively researched in the domains of environmental remediation and energy production. ![]()
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