Abstract
Hydrogen peroxide is an environment-friendly reactive oxygen species and a significant green oxidant. However, the highly efficient and sustainable production of H2O2 remains a challenge. Herein, we demonstrated a state-of-the-art photocatalytic method for H2O2 production using an optimal tubular graphic carbon nitride (TCN)/ZnIn2S4 (ZIS) heterojunction. Within 3 h, a H2O2 production rate of 2.77 mmol g−1 h−1 was achieved by the TCN/ZIS heterojunction, which is 3.4- and 23.1-fold higher than that obtained by its individual TCN and ZIS components, respectively. Experimental results showed that the excellent photoactivity of TCN/ZIS is mainly due to the formation of heterojunction, which improves the charge separation ability and thereby promotes the proton-coupled electron transfer by initially reducing O2 to ·O2− and subsequently generating H2O2. This work has developed an efficient and green strategy for H2O2 production with scientific and practical value for environmental remediation.
摘要
过氧化氢(H2O2)是一种环保的活性氧和重要的绿色氧化剂. 然而, 到目前为止, 实现高效和绿色可持续H2O2生产仍然面临挑战. 本文中, 我们展示了管状氮化碳(TCN)和ZnIn2S4 (ZIS)纳米片(TCN/ZIS)异质结的光催化产H2O2 性能: 3 小时内H2O2 的生产速率为 2.77 mmol g−1 h−1, 分别为单独的TCN和ZIS的3.4倍和23.1倍. 实验结果表明, TCN/ZIS异质结优异的光催化活性主要源于ZIS促进了电荷分离, 从而通过将O2还原为·O2−, 然后生成H2O2来实现质子耦合电子转移过程. 该工作提出了一种高效、 绿色的H2O2生产策略, 对环境修复具有重要科学意义和实用价值.
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Acknowledgements
This work was supported by the Outstanding Youth Fund of Heilongjiang Province (JQ 2020B002), Guangxi Science and Technology Base and Talent Special Project (AD21075001), and the Reform and Development Fund Project of Local University supported by the Central Government.
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Author contributions Wang J, Guo C and Jiang B designed and performed the experiments and wrote the paper; Li Y, Wan J and Zheng B revised the manuscript; Wang J and Guo C performed part of the experimental characterizations; Jiang Y and Li Y provided the experiment guidance. All authors contributed to the general discussion.
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Supplementary information Experimental details and supporting data are available in the online version of the paper.
Junxia Wang is now a postgraduate at the School of Chemistry and Materials Science, Heilongjiang University. Her current research interests include photocatalytic materials.
Yuxin Li received his BE degree in pharmaceutical engineering in 2007 and MSc degree in organic chemistry in 2010 from Heilongjiang University. He then received his PhD degree in materials science and technology from Harbin Institute of Technology in 2014. Then he joined the School of Chemistry and Materials Science, Heilongjiang University. His research interest covers photocatalytic materials.
Baojiang Jiang received his BSc degree in 2001 from Heilongjiang University, China. In 2012, he received his PhD degree from Harbin Engineering University, China. He became a full professor in 2016 at Heilongjiang University. His recent research interests include organic/inorganic semiconductor photocatalytic materials for renewable clean energy and environmental protection applications.
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Highly Efficient Photocatalytic H2O2 Production by Tubular g-C3N4/ZnIn2S4 Nanosheet Heterojunction via Improved Charge Separation
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Wang, J., Guo, C., Jiang, Y. et al. Highly efficient photocatalytic H2O2 production by tubular g-C3N4/ZnIn2S4 nanosheet heterojunctions via improved charge separation. Sci. China Mater. 66, 1053–1061 (2023). https://doi.org/10.1007/s40843-022-2218-7
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DOI: https://doi.org/10.1007/s40843-022-2218-7