rGO/TiO<sub>2</sub>复合光催化剂的制备及光催化性能

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摘要用Hummers法制备氧化石墨烯（GO），以柠檬酸作为钛酸四丁酯的水解抑制剂和氧化石墨烯的表面活性剂制备GO/TiO₂前驱体溶胶，经过干燥、热处理后用NaBH4还原得到还原氧化石墨烯/TiO₂（rGO/TiO₂）复合光催化剂.利用X射线衍射（XRD）、透射电镜（TEM）、荧光光谱（PL）对其进行表征分析；研究了GO的引入量、光催化剂的投入量对甲基橙降解性能的影响.结果表明：柠檬酸的加入能有效改善纳米TiO₂在rGO表面的分散情况；rGO/TiO₂复合光催化剂的光催化活性明显高于纯TiO₂；GO的加入量为10%且催化剂用量为0.1g时催化效果最佳.

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	李翠霞
	金海泽
	谭高伟
	曾鹏飞
	杨志忠
	杨轩

关键词 ：石墨烯, TiO₂, 柠檬酸, 复合材料, 光催化

Abstract：Graphene oxide (GO) was prepared by the Hummers method. In the synthesis process of GO/TiO₂ precursor sol, citric acid was selected as the hydrolysis inhibitors of tetrabutyl titanate and the surfactant of graphene oxide. After drying and heat treatment, the reduced graphene oxide/TiO₂ (rGO/TiO₂) photocatalysts were prepared by the method of sodium borohydride reduction. The photocatalysts were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and photoluminescence (PL) spectroscopy technology. The effects of the amounts of GO additives and the photocatalysts on the degradation rate of methyl orange were investigated, respectively. The dispersion of nanometer TiO₂ on the graphene surface was improved effectively; the photocatalytic activity of rGO/TiO₂ was obviously higher than that of pure TiO₂, and the rGO/TiO₂ photocatalysts presented the best photocatalytic performance with the GO amount of 10% and the photocatalysts mass of 0.10g.

Key words： graphene TiO₂ citric acid composite photocatalysis

收稿日期: 2016-06-21

PACS:

X703

基金资助:省部共建有色金属先进加工与再利用国家重点实验室开放课题（SKLAB02015010）；兰州理工大学博士基金（010441）

通讯作者: 李翠霞,副教授,licx2007@lut.cn E-mail: licx2007@lut.cn

作者简介: 李翠霞(1972-),女,河北卢龙人,副教授,博士,主要从事无机功能纳米材料研究.发表论文20余篇.

引用本文:

李翠霞, 金海泽, 谭高伟, 曾鹏飞, 杨志忠, 杨轩. rGO/TiO₂复合光催化剂的制备及光催化性能[J]. 中国环境科学, 2017, 37(2): 570-576. LI Cui-xia, JIN Hai-ze, TAN Gao-wei, ZENG Peng-fei, YANG Zhi-zhong, YANG Xuan. The preparation and photocatalytic activity of rGO/TiO₂ composite photocatalyst. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(2): 570-576.

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http://manu36.magtech.com.cn/Jweb_zghjkx/CN/ 或 http://manu36.magtech.com.cn/Jweb_zghjkx/CN/Y2017/V37/I2/570

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