硫氯共掺杂g-C<sub>3</sub>N<sub>4</sub>纳米片光催化降解染料

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Abstract The sulfur- and chlorine-co-doped g-C₃N₄ nanosheets were prepared by the bubble template method. The as-prepared samples were detected by XRD, FT-IR, XPS, SEM, UV-Vis DRS, and PL. The photocatalytic activities of samples were evaluated under visible by the photocatalytic degradation of rhodamine B (RhB). The analysis showed that the modified sulfur- and chlorine-co-doped g-C₃N₄ nanosheets had a larger specific surface area, the electron-hole separation efficiency was improved, and the doping caused a change in the energy band structure so that the oxidant that degrades RhB was reduced from the single ·O₂^- becomes ·O₂^- and ·OH^- dual oxidants, which greatly improved the degradation ability. The RhB degradation rate constant of sulfur and chlorine co-doped g-C₃N₄ nanosheets arrived at 0.01683min^-1, which was 5.5times higher than that of pure g-C₃N₄.

Key words： doping graphite carbon nitride photocatalytic degradation

Received: 10 March 2021

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X703

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	LIU Yuan
	ZHAO Hua
	LI Hui-peng
	CAI Tian-feng

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LIU Yuan,ZHAO Hua,LI Hui-peng等. Photocatalytic degradation of dyes by sulfur- and chlorine-co-doped g-C₃N₄ nanosheets[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(10): 4662-4669.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I10/4662

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