Open Access

ARTICLE

Vacancy-defect promoting blue LED-driven H₂O₂ synthesis on Zn_0.4Cd_0.6S without additional cocatalysts

W. W. Lu, J. N. Ding, Z. Y. Wang, Y. C. Wei, Y. P. Chen, J. Xu^*

School of Physics and Electronic Engineering, Jingjiang College, Jiangsu University, Zhenjiang, China, 212013, P. R.
Quantum Sensing and Agricultural Intelligence Detection Engineering Center of Jiangsu Province, Zhenjiang, Jiangsu, 212013, P. R. China

* Corresponding Author:

Chalcogenide Letters 2024, 21(8), 631-640. https://doi.org/10.15251/CL.2024.218.631

Received 25 May 2024; Accepted 12 August 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, Zn_0.4Cd_0.6S with abundant S vacancies (S_V-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, S_V-ZCS is endowed with enhanced light capture capability, enhancing the overall photocatalytic activity for H₂O₂ production. The results were in line with expectations, the S_V-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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Keywords

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