CuO负载空心球状BiVO<sub>4</sub>可见光矿化气相甲苯

引用本文: 赵伟荣, 曾婉昀, 奚海萍, 余纤纤. CuO负载空心球状BiVO₄可见光矿化气相甲苯[J]. 物理化学学报, 2014, 30(4): 761-767. doi: 10.3866/PKU.WHXB201402132 shu

Citation: ZHAO Wei-Rong, ZENG Wan-Yun, XI Hai-Ping, YU Xian-Xian. Photocatalytic Degradation of Gas-Phase Toluene over CuO Loaded BiVO₄ Hollow Nanospheres under Visible-light Irradiation[J]. Acta Physico-Chimica Sinica, 2014, 30(4): 761-767. doi: 10.3866/PKU.WHXB201402132 shu

CuO负载空心球状BiVO₄可见光矿化气相甲苯

基金项目:
国家自然科学基金（51178412，51278456)

国家科技支撑计划项目（2013BAC16B01）资助

摘要:

以碳球为模板，采用溶胶-凝胶法制备空心球状BiVO₄，浸渍法制备CuO负载BiVO₄. 运用X射线衍射（XRD）、扫描电镜（SEM）、高分辨率透射电镜（HRTEM）、Brunauer-Emmett-Teller （BET）、塔菲尔（Tafel）、线性扫描（LSV）、光电转化效率（IPCE）、紫外-可见漫反射光谱（UV-Vis-DRS）等手段对催化剂进行表征. 结果表明，空心球状BiVO₄比表面积（10.24 m²·g^-1）是无定型BiVO₄ （1.97 m²·g^-1）的5.20 倍. 负载CuO后，与BiVO₄形成p-n 型异质结结构. 其中，5%负载量的空心球状BiVO₄具有最佳电化学性能，Tafel 表征腐蚀电流密度（2.22 μA·cm^-2）为空心球状BiVO₄（0.18 μA·cm^-2）的12.33 倍，禁带宽度减小为2.30 eV. 以甲苯为模型污染物研究催化剂对挥发性有机化合物（VOCs）的催化去除和矿化效果，5% CuO负载量的空心球状BiVO₄光催化氧化能力最佳，可见光照6 h甲苯降解率达85.0%，矿化率达12.0%.

关键词:

English

Photocatalytic Degradation of Gas-Phase Toluene over CuO Loaded BiVO₄ Hollow Nanospheres under Visible-light Irradiation

1.
Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, P. R. China
Received Date: 17 December 2013
Available Online: 31 March 2014
Fund Project:
国家自然科学基金（51178412，51278456)

国家科技支撑计划项目（2013BAC16B01）资助

Abstract:

The sol-gel method was used for the synthesis of BiVO₄ hollow nanospheres by employing carbon spheres as a hard template. CuO loaded composite photocatalysts were prepared by impregnation. The catalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), Brunauer-Emmett-Teller (BET), Tafel polarization curves (Tafel), linear sweep voltammetry (LSV), monochromatic incident photon to current conversion efficiency (IPCE), and UV-Vis diffuse reflectance spectroscopy (UV-Vis-DRS). We found that the BET surface area of the BiVO₄ hollow nanospheres (10.24 m²·g^-1) was 5.20 times that of the amorphous form of BiVO₄ (1.97 m²·g^-1). A p-n heterojunction was formed between CuO and BiVO₄. Samples with 5% CuO exhibited optimal photoelectrochemical performance. They had a higher corrosion current density (12.33 times as much as that of the BiVO₄ hollow nanospheres), and a smaller band gap (2.30 eV). Toluene was chosen as a model pollutant to evaluate the removal capacity and the CO₂ mineralization rate of volatile organic compounds under visible light. The samples doped with 5% CuO exhibited optimal visible-light photocatalytic activity, with an 85.0% toluene degradation efficiency and a 12.0% mineralization rate in 6 h.

Key words:

Sol-gel method
/ Heterojunction
/ Electrochemistry
/ Volatile organic compound
/ Photon to current conversion efficiency

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

CuO负载空心球状BiVO₄可见光矿化气相甲苯

English

Photocatalytic Degradation of Gas-Phase Toluene over CuO Loaded BiVO₄ Hollow Nanospheres under Visible-light Irradiation

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

CuO负载空心球状BiVO4可见光矿化气相甲苯

English

Photocatalytic Degradation of Gas-Phase Toluene over CuO Loaded BiVO4 Hollow Nanospheres under Visible-light Irradiation

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

CuO负载空心球状BiVO₄可见光矿化气相甲苯

Photocatalytic Degradation of Gas-Phase Toluene over CuO Loaded BiVO₄ Hollow Nanospheres under Visible-light Irradiation

CCS Chemistry：颜徐州、鲍哲南：你的皮肤可能是一片SPMs