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Constructing Internal Electric Field in g-C3N4 Significantly Promotes the Photocatalytic Performance for H2O2 Generation

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Abstract

Solar-to-H2O2 photocatalytic conversion has attracted increasing attention since H2O2 is a vital oxidizing reagent and the solar energy is inexhaustible and sustainable. Though it has been widely recognized that the photocatalytic performance for H2O2 generation could be enhanced through P incorporating into g-C3N4 framework, its intrinsic reason is still ambiguous. In the present work, internal electronic field (IEF) was ascertained to be constructed in the framework of P doped g-C3N4 (PDCN), and its intensity could be feasibly adjusted through changing the P doping amount. Particularly, PDCN-10, as the optimum photocatalyst synthesized when the P doping amount was 10%, possessed an IEF intensity of 3.1 times than the pristine g-C3N4, leading to 10.0-folds higher of H2O2 yield. The present research for the first time discloses the intrinsic reason for the promoted photocatalytic performance for H2O2 generation over P doped g-C3N4, thereby providing a new insight for the design of photocatalyst with satisfactory performance via constructing IEF.

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Acknowledgements

This work was partly supported by National Natural Science Foundation of China (21776188, 2150613), Department of Science and Technology of Sichuan Province (2020YFG0158, 2020YFH0162), and the Engineering Research Center for the Development of Farmland Ecosystem Service Functions, Sichuan Province Institutions of Higher Education.

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Correspondence to Jun Ma.

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Wang, C., Wang, K., He, X. et al. Constructing Internal Electric Field in g-C3N4 Significantly Promotes the Photocatalytic Performance for H2O2 Generation. Catal Lett 151, 1225–1230 (2021). https://doi.org/10.1007/s10562-020-03389-4

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