多壁碳纳米管改性InVO4光催化剂的制备及性能

doi:10.3724/SP.J.1077.2011.00508

无机材料学报 ›› 2011, Vol. 26 ›› Issue (5): 508-512.DOI: 10.3724/SP.J.1077.2011.00508

多壁碳纳米管改性InVO₄光催化剂的制备及性能

陈亦琳, 操小鑫, 林碧洲

(华侨大学材料科学与工程学院, 厦门 361021)

收稿日期:2010-07-31 修回日期:2010-09-24 出版日期:2011-05-20 网络出版日期:2011-06-07
作者简介:陈亦琳(1977-), 男, 博士, 讲师. E-mail: ylchen@hqu.edu.cn
基金资助:
国家自然科学基金(21003055, 50872037); 福建省自然科学基金(2007F3061); 华侨大学高层次人才资助项目(06BS213)

Preparation and Property of Visible-light-driven InVO₄/MWCNTs Photocatalyst for Benzene Decomposition

CHEN Yi-Lin, CAO Xiao-Xin, LIN Bi-Zhou

(College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, China)

Received:2010-07-31 Revised:2010-09-24 Published:2011-05-20 Online:2011-06-07
Supported by:
National Natural Science Foundation of China (21003055, 50872037); Natural Science Foundation of Fujian Province of China (2007F3061); Startup Fund for the Talent of Huaqiao University (06BS213)

摘要/Abstract

摘要： 以酸处理的多壁碳纳米管(MWCNTs)为载体, 采用水热合成法制备了InVO₄/MWCNTs光催化剂. 利用场发射扫描电镜、X射线粉末衍射、BET-N2吸附、傅里叶红外光谱和紫外-可见漫反射吸收光谱等技术对样品的形貌、晶相组成、比表面积和吸光性能等物理性质进行了表征, 并以气相的苯作为模型污染物, 研究催化剂样品在可见光(λ>420 nm)照射下的光催化氧化能力. 结果表明, InVO₄颗粒均匀附着于MWCNTs, 表面粒径约100 nm. 与纯InVO₄相比, InVO₄/MWCNTs的比表面积和可见光吸收性能显著提高. 在可见光照射下, InVO4/MWCNTs具有良好的光催化活性, 反应4 h光催化降解苯的转化率和矿化率分别为41.0%和43.4%, 其转化率分别是InVO₄的1.5倍和掺氮TiO₂的3倍, InVO₄/MWCNTs光催化活性的提高与载体MWCNTs良好的电子传输特性有关.

关键词: InVO₄/MWCNTs, 可见光, 光催化, 苯

Abstract: InVO₄/MWCNTs photocatalyst was synthesized by a hydrothermal method using acid-treated multi- walled carbon nanotubes (MWCNTs) as a support. The prepared InVO₄/MWCNTs photocatalyst was examined by X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM), Brunauer-Emmett-Teller (BET) nitrogen adsorption, Fourier transform infrared spectroscopy (FTIR) and UV-Vis diffuse reflectance spectrum (UV-Vis DRS). The photocatalytic activity of the as-prepared samples was determined by the degradation of gas-phase benzene under visible light (λ>420 nm) irradiation. The results show that the InVO₄ particles are uniformly anchored on the surface of MWCNTs with average size of 100 nm. The specific surface area and the optical absorption of InVO₄/MWCNTs are remarkably improved, as compared with that of the pure InVO₄. After photocatalytic oxidation for 4h, the conversion rate of benzene over the InVO₄/MWCNTs is 41.0%, which is 1.5 times as much as that of the InVO₄ or 3 times greater than that of the N-doped TiO₂, respectively. Simultaneously, the mineralization rate of benzene on the InVO₄/MWCNTs is 43.4%. The enhanced photocatalytic performance of the InVO₄/MWCNTs is related to the excellent electron-transporting properties of the MWCNTs, which acts as a trap for photogenerated electron.

Key words: InVO₄/MWCNTs, visible light, photocatalysis, benzene

中图分类号:

O643

陈亦琳, 操小鑫, 林碧洲. 多壁碳纳米管改性InVO₄光催化剂的制备及性能[J]. 无机材料学报, 2011, 26(5): 508-512.

CHEN Yi-Lin, CAO Xiao-Xin, LIN Bi-Zhou. Preparation and Property of Visible-light-driven InVO₄/MWCNTs Photocatalyst for Benzene Decomposition[J]. Journal of Inorganic Materials, 2011, 26(5): 508-512.

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多壁碳纳米管改性InVO₄光催化剂的制备及性能

Preparation and Property of Visible-light-driven InVO₄/MWCNTs Photocatalyst for Benzene Decomposition

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