Efficient dual-functional photocatalysis: Synchronous coupling of H2O2 generation and selective benzyl alcohol oxidation over a ZIF-8/CdS S-scheme heterojunction

发表于 2026-7-15 17:05:13

DOI号:[size=1em]doi.org/10.1016/j.jece.2026.123402

文献链接:Efficient dual-functional photocatalysis: Synchronous coupling of H2O2 generation and selective benzyl alcohol oxidation over a ZIF-8/CdS S-scheme heterojunction - ScienceDirect

文献作者:Zhihao Ding, Yubin Wang, Changyan Guo, Kefu Wang, Jianmin Li, Jiang Li, Bing Chen, Yutong Sun, Gengyuan Zhang, Jide Wang
备注信息:AbstractThe sustainable synthesis and effective separation of hydrogen peroxide (H2O2) are crucial for advancing green chemistry. In this study, ZIF-8/CdS-3 heterojunction photocatalyst was successfully fabricated through an in situ growth strategy using ZIF-8 as both a sacrificial template and a precursor, together with optimized CdS loading. The constructed heterojunction shortened the carrier diffusion pathway, enhanced the mass transfer efficiency of reactants O2 and benzyl alcohol (BA), and improved visible-light absorption capability. Under visible-light irradiation, ZIF-8/CdS-3 exhibited remarkable photocatalytic performance, achieving benzaldehyde (BAD) and H2O2 production rates of 8108 and 5362 μmol g−1 h−1, respectively. Compared with pure CdS, ZIF-8/CdS-3 exhibited 7.7- and 6.7-fold higher production rates for BAD and H2O2, respectively. Spectroscopic and electrochemical analyses confirmed that the composite catalyst followed a direct S-scheme charge-transfer mechanism. This charge-transfer pathway effectively promoted the spatial separation of photogenerated electron–hole pairs while preserving strong redox capability, thereby facilitating the generation of superoxide radicals (·O2−). This work provides a promising strategy for the simultaneous and photocatalytic production of H2O2 and selective oxidation of BA under mild photocatalytic conditions through the synergistic integration of the hollow ZIF-8 structure and the S-scheme charge-transfer pathway.

[Elsevier/Sciencedirect] Efficient dual-functional photocatalysis: Synchronous coupling of H2O2 generation and selective benzyl alcohol oxidation over a ZIF-8/CdS S-scheme heterojunction

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[Elsevier/Sciencedirect] Efficient dual-functional photocatalysis: Synchronous coupling of H2O2 generation and selective benzyl alcohol oxidation over a ZIF-8/CdS S-scheme heterojunction