化工新型材料

化工新型材料 ›› 2019, Vol. 47 ›› Issue (12) : 191-195.

科学研究

Cu₂O/g-C₃N₄/Bi₂WO₆三元复合光催化剂的制备及性能研究

郑先君, 陈萍萍, 赵梦, 魏丽芳, 王焕新

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Study on synthesis and property of Cu₂O/g-C₃N₄/Bi₂WO₆ ternary photocatalyst

Zheng Xianjun, Chen Pingping, Zhao Meng, Wei Lifang, Wang Huanxin

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文章历史 +

Received		Published
2018-07-04		2019-12-20
Issue Date	Revised Date
2020-01-03	2018-07-04

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摘要

采用水热法和还原沉淀法制备了三元复合光催化剂Cu₂O/g-C₃N₄/Bi₂WO₆,利用X射线衍射仪、扫描电子显微镜、X射线光电子能谱仪、紫外-可见漫反射光谱仪和电化学交流阻抗测试对光催化剂的结构组成、形貌、光吸收性能、电化学性能等进行分析。在制备的三元复合光催化剂中,片状钨酸铋(Bi₂WO₆)和层状类石墨相氮化碳(g-C₃N₄)依附在立方体氧化亚铜(Cu₂O)上。以短链脂肪酸为牺牲剂,考察了不同光催化剂的光催化产生氢气和烷烃的性能。结果表明:以乙酸、丙酸、丁酸为牺牲剂,10% Cu₂O/5% g-C₃N₄/Bi₂WO₆三元复合光催化剂的光催化性能比纯Bi₂WO₆分别提高了4.20、5.21、4.24倍,降解率分别达到82.44%、86.12%、79.29%。

Abstract

Cu₂O/g-C₃N₄/Bi₂WO₆ ternary photocatalyst was prepared by hydrothermal method and reduction-deposition method.The structures,compositions,morphologies,light absorption ability and electrochemical properties of samples were characterized by XRD,SEM,XPS,UV-Vis DRS and EIS.It was observed that flake-like Bi₂WO₆ and layered g-C₃N₄ were attached to cubic Cu₂O.The photocatalytic properties for production of hydrogen and alkanes over different photocatalysts were evaluated using short-chain fatty acids as sacrificial agents.Compared with pure Bi₂WO₆,photocatalytic activity of 10% Cu₂O/5% g-C₃N₄/Bi₂WO₆ enhanced 4.20,5.21 and 4.24 times using acetic acid,propionic acid and butyric acid as electron donors,respectively.The corresponding degradation efficiencies of acetic acid,propionic acid and butyric acid were 82.44%,86.12% and 79.29%,respectively.

关键词

氧化亚铜 / 类石墨相氮化碳 / 钨酸铋 / 氢气 / 烷烃

Key words

Cu₂O / g-C₃N₄ / Bi₂WO₆ / hydrogen / alkane

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Cu₂O/g-C₃N₄/Bi₂WO₆三元复合光催化剂的制备及性能研究[J]. 化工新型材料, 2019, 47(12): 191-195 DOI:

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