化工新型材料

化工新型材料 ›› 2023, Vol. 51 ›› Issue (11) : 217-222. DOI: 10.19817/j.cnki.issn1006-3536.2023.11.006

科学研究

双Z型Ag/AgCl/Bi₂WO₆/Bi₂MoO₆复合光催化剂的制备及其性能研究

^1,2

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Preparation and properties of double Z-scheme Ag/AgCl/Bi₂WO₆/Bi₂MoO₆ composite photocatalyst

Dong Wei^1,2, Lin Li³, Li Xiangyang³, Gu Huaizhang^1,2, Li Yuanxun^1,2, Li Dang^1,2, Zeng Zhengjie¹

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Received		Published
2022-07-06		2023-11-20
Issue Date	Revised Date
2023-11-29	2022-07-06

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摘要

采用一步水热法和原位共沉淀法制备了一种具备可见光响应的双Z型复合光催化剂Ag/AgCl/Bi₂WO₆/Bi₂MoO₆,通过扫描电子显微镜、X射线衍射分析仪、X射线光电子能谱仪、紫外-可见漫反射光谱仪表征了复合光催化剂的形貌、结构、组成和吸光性能。以罗丹明B(RhB)为模拟污染物在可见光照射下进行降解以此评价复合光催化剂的性能。结果表明,AgCl、Bi₂WO₆和Bi₂MoO₆构建的双Z型异质结具有较高的催化活性,120min内对RhB的降解率高达97.8%。通过在催化剂表面进行光照还原出单质Ag而产生的局部等离子共振效应,增强了复合催化剂对可见光的吸收强度。此外,提出了双Z型Ag/AgCl/Bi₂WO₆/Bi₂MoO₆复合光催化剂降解RhB的作用机理。

Abstract

A double Z-scheme composite photocatalyst Ag/AgCl/Bi₂WO₆/Bi₂MoO₆ with visible light response was prepared by one-step hydrothermal method and in-situ coprecipitation method.The morphology,structure,composition and absorbance properties of the composite photocatalyst were characterized by scanning electron microscopy,X-ray diffraction,X-ray photoelectron spectrometer and ultraviolet-visible diffuse reflectance spectrometer.Rhodamine B (RhB) was used as a simulated pollutant to evaluate the performance of the composite photocatalyst by degrading RhB under visible light.The results showed that the double Z-scheme heterojunction constructed by AgCl,Bi₂WO₆ and Bi₂MoO₆ had high catalytic activity,and the degradation rate for RhB was as high as 97.8% within 120min.The absorption intensity of visible light of the composition photocatalyst was enhanced by the local plasma resonance effect caused by the light reduction of elemental Ag on the surface of the catalyst.In addition,a possible mechanism of RhB degradation by the double Z-scheme Ag/AgCl/Bi₂WO₆/Bi₂MoO₆ photocatalyst was proposed.

关键词

复合光催化剂 / 表面等离子共振 / 可见光响应

Key words

composite photocatalyst / surface plasma resonance / visible light response

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双Z型Ag/AgCl/Bi₂WO₆/Bi₂MoO₆复合光催化剂的制备及其性能研究[J]. 化工新型材料, 2023, 51(11): 217-222 DOI:10.19817/j.cnki.issn1006-3536.2023.11.006

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