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One step synthesis of high-efficiency AgBr–Br–g-C₃N₄ composite catalysts for photocatalytic H₂O₂ production via two channel pathway

Author:
Wang, Yunke, Hu, Shaozheng, Li, Qiang, Gu, Guizhou, Zhao, Yanfeng, Liang, Hongyu, Li, Wei
Source:
RSC advances 2018 v.8 no.64 pp. 36903-36909
ISSN:
2046-2069
Subject:
X-ray diffraction, X-ray photoelectron spectroscopy, adsorption, catalysts, electron paramagnetic resonance spectroscopy, hydrogen peroxide, nitrogen, photocatalysis, transmission electron microscopy, ultraviolet-visible spectroscopy
Abstract:
In this work, a two-component modified AgBr–Br–g-C₃N₄ composite catalyst with outstanding photocatalytic H₂O₂ production ability is synthesized. XRD, UV-Vis, N₂ adsorption, TEM, XPS, EPR and PL were used to characterize the obtained catalysts. The as-prepared AgBr–Br–g-C₃N₄ composite catalyst shows the highest H₂O₂ equilibrium concentration of 3.9 mmol L⁻¹, which is 7.8 and 19.5 times higher than that of GCN and AgBr. A “two channel pathway” is proposed for this reaction system which causes the remarkably promoted H₂O₂ production ability. In addition, compared with another two-component modified catalyst, Ag–AgBr–g-C₃N₄, AgBr–Br–g-C₃N₄ composite catalyst displays the higher photocatalytic H₂O₂ production ability and stability.
Agid:
6202873