可见光响应的BiVO<SUB>4</SUB>/TiO<SUB>2</SUB>纳米复合光催化剂

doi:10.3964/j.issn.1000-0593(2010)07-1944-04

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摘要：通过水热法制备了两种新型纳米复合材料BiVO₄/TiO₂，并对其晶体结构、形貌尺寸及光催化活性进行了测试。X射线粉末衍射测试结果表明，这两种复合材料均是由单斜相BiVO₄和锐钛矿型TiO₂构成;扫描电镜和透射电镜测试结果表明，两种样品均为BiVO₄纳米颗粒负载于TiO₂纳米线上;通过测试紫外-可见吸收光谱可观察到BiVO₄/TiO₂的吸收边相对于纯TiO₂明显发生了红移;在相同实验条件下，对亚甲基蓝的可见光催化降解实验结果表明，由含Bi³⁺钛酸盐纳米线制备的BiVO₄/TiO₂的光催化活性远高于纯BiVO₄和TiO₂半导体材料。

关键词：纳米复合物;BiVO₄/TiO₂;光催化剂;可见光响应;水热合成

Abstract：The two kinds of new nanocomposites BiVO₄/TiO₂ nanowires were synthesized by hydrothermal process. Their crystal structure, morphology and photocatalytic activities for degradation of methylene blue solution were characterized using various measurement techniques. The XRD results indicate that they are made up of monoclinic BiVO₄ and anatase TiO₂ phases. The SEM, TEM and HRTEM images show that the two samples include BiVO₄ nanoparticles supported onto TiO₂ nanowires. The UV-Vis absorption spectra reveal that the absorption edges of the samples exhibit red-shift in comparison with that of the pure TiO₂ nanowires. The measurement results for the visible-light photodegradation of methylene blue show that the nanocomposite sample prepared from the layered titanate nanowires with Bi³⁺ has the highest photocatalytic activity.

Key words：Nanocomposite;BiVO₄/TiO₂;Photocatalyst;Visible responding;Hydrothermal synthesis

收稿日期: 2009-08-01 修订日期: 2009-11-06

中图分类号:

O482

通讯作者: 嵇天浩 E-mail: jitianhao@th.btbu.edu.cn

引用本文:

嵇天浩，杨芳，周娇艳，杜海燕，孙家跃 . 可见光响应的BiVO₄/TiO₂纳米复合光催化剂 [J]. 光谱学与光谱分析, 2010, 30(07): 1944-1947.
JI Tian-hao, YANG Fang, ZHOU Jiao-yan, DU Hai-yan, SUN Jia-yue . Visible-Light Responding BiVO₄/TiO₂ Nanocomposite Photocatalyst . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2010, 30(07): 1944-1947.

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