Vacancy-defect promoting blue LED-driven H2O2 synthesis on Zn0.4Cd0.6S without additional cocatalysts

School Of Physics And Electronic Engineering, Jingjiang College, Jiangsu University, Zhenjiang, China, 212013, P R ,W W Lu,J N Ding,School Of Physics And Electronic Engineering, Jingjiang College, Jiangsu University, Zhenjiang, China, 212013, P R ,Z Y Wang,School Of Physics And Electronic Engineering, Jingjiang College, Jiangsu University, Zhenjiang, China, 212013, P R ,Y C Wei,School Of Physics And Electronic Engineering, Jingjiang College, Jiangsu University, Zhenjiang, China, 212013, P R ,Y P Chen,School Of Physics And Electronic Engineering, Jingjiang College, Jiangsu University, Zhenjiang, China, 212013, P R ,J Xu,School Of Physics And Electronic Engineering, Jingjiang College, Jiangsu University, Zhenjiang, China, 212013, P R

doi:10.15251/cl.2024.218.631

School Of Physics And Electronic Engineering, Jingjiang College, Jiangsu University, Zhenjiang, China, 212013, P R , W W Lu + Show 10 more

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https://doi.org/10.15251/cl.2024.218.631

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Journal: Chalcogenide Letters

Publication Date: Aug 19, 2024

Abstract

Photocatalytic synthesis of hydrogen peroxide offers an effective solution to the energy crisis. The design and development of high-activity and low-cost photocatalysts are crucial for H2O2 production. In this work, Zn0.4Cd0.6S with abundant S vacancies (SV-ZCS) is developed for H2O2 photosynthesis under 405 nm LED illumination without additional cocatalysts. The S vacancies serve as photo-generated electron trap centers, effectively extending the lifetimes of photogenerated carriers and promoting the separation of photoelectric carriers. Additionally, SV-ZCS is endowed with enhanced light capture capability, enhancing the overall photocatalytic activity for H2O2 production. The results were in line with expectations, the SV-ZCS samples demonstrated a hydrogen peroxide (H2O2) productivity of 3902 μmol L-1 h-1 when subjected to visible light irradiation, representing a significant increase compared to that of ZCS (2840 μmol L-1 h-1 ). This work provides an effective strategy for preparing photocatalysts for efficient hydrogen peroxide production.

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