Polyimide/ZnIn2S4 heterostructures toward outstanding photocatalytic H2O2 production from pure water and air
APPLIED SURFACE SCIENCE(2024)
摘要
The photocatalytic production of H2O2 using the abundant water and air on earth is promising. Herein, the flower-like polyimide/ZnIn2S4 heterostructures were prepared by a simple two-step solvothermal method, where the tight interface formed between polyimide (PI) and ZnIn2S4 microspheres facilitated the separation and migration of photo-generated charges. Under air condition, the photocatalytic H2O2 production rate without any sacrificial agent is as high as 411.07 mu mol g-1 h-1, which is 15.4 and 3.2 times higher than that of the pristine PI and ZnIn2S4 microspheres, respectively. Meanwhile, the PI/ZnIn2S4-2 has excellent reusability, and the H2O2 production of PI/ZnIn2S4-2 maintained 80% of its original value after five cycles. Moreover, the as-prepared samples underwent comprehensive characterization using various techniques, and the photocatalytic mecha-nism was also studied in detail. Active species capture experiments showed that e(-) and .O-2(-) played the primary role in this reaction system. This work provides a novel idea for photocatalytic H2O2 production in pure water and air.
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关键词
Photocatalysis,Visible light
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