异质结构AgCl/Bi2WO6微米球制备、表征及其光催化性能

doi:10.1016/S1872-2067(15)60849-X

催化学报 ›› 2015, Vol. 36 ›› Issue (7): 987-993.DOI: 10.1016/S1872-2067(15)60849-X

异质结构AgCl/Bi₂WO₆微米球制备、表征及其光催化性能

李家德^a, 余长林^a, 方稳^a,b, 朱丽华^a, 周晚琴^a, 樊启哲^a

a 江西理工大学冶金与化学工程学院, 江西赣州341000;
b 福州大学能源与环境光催化国家重点实验室, 福建福州350002

收稿日期:2015-02-25 修回日期:2015-03-27 出版日期:2015-06-12 发布日期:2015-07-30
通讯作者: 余长林电话/传真: (0797)8312334; 电子信箱: yuchanglinjx@163.com
基金资助:
国家自然科学基金(21067004, 21263005); 江西省自然科学基金青年科学基金计划(20133BAB21003); 江西省教育厅高等学校科技落地计划项目(KJLD14046); 江西省青年科学家培养项目(20122BCB23015); 江西省远航工程, 江西省研究生创新资金项目(3104000089, 3104100013); 江西理工大学研究生创新资金项目(104100039).

Preparation, characterization and photocatalytic performance of heterostructured AgCl/Bi₂WO₆ microspheres

Jia-de Li^a, Chang-lin Yu^a, Wen Fang^a,b, Li-hua Zhu^a, Wan-qin Zhou^a, Qi-zhe Fan^a

a School of Metallurgy and Chemical Engineering, Jiangxi University of Science and Technology, Jiangxi, Ganzhou 341000, Jiangxi, China;
b State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350002, Fujian, China

Received:2015-02-25 Revised:2015-03-27 Online:2015-06-12 Published:2015-07-30
Supported by:
This work was supported by the National Natural Science Foundation of China (21067004, 21263005), the Young Science and Technology Project of Jiangxi Province Natural Science Foundation China (20133BAB21003), The Landing Project of Science and Technology of Colleges and Universities in Jiangxi Province (KJLD14046), Young Scientist Training Project of Jiangxi Province (20122BCB23015), Yuanhang Engineering of Jiangxi Province, Graduate innovation project of Jiangxi Province (3104000089, 3104100013) and Graduate innovation project of Jiangxi University of Science and Technology (3104100039).

摘要/Abstract

摘要：

首先利用水热法制备了由纳米片组装的粒径为1.5-2 μm的Bi₂WO₆微球, 然后在微球表面沉积了不同含量的AgCl (5 wt%, 10 wt%, 20 wt%, 30 wt%), 制备了异质结构AgCl/Bi₂WO₆微球光催化剂. 利用X射线粉末衍射、扫描电镜、透射电镜、红外光谱、紫外-可见漫反射吸收等手段对所制的光催化剂进行表征, 并以紫外光和可见光分别为光源, 罗丹明B为降解对象测试了其光催化活性, 考察复合不同含量的AgCl对Bi₂WO₆光催化剂的性能影响. 结果表明, 沉积AgCl对Bi₂WO₆的晶体结构、表面性能和光吸收性能没有产生明显影响, 但大幅度提高了Bi₂WO₆的紫外和可见光催化活性. 当复合20 wt%AgCl时, AgCl/Bi₂WO₆光催化活性最佳, 紫外光下比纯Bi₂WO₆提高了2.2倍, 可见光下提高了1倍. 这主要是由于形成的AgCl/Bi₂WO₆异质结能有效抑制光生电子和空穴的复合, 从而提了其光催化性能.

关键词: 纳米微球, 氯化银, 钡酸铋, 异质结构, 光催化, 罗丹明B

Abstract:

Bi₂WO₆ microspheres with a diameter of 1.5-2 μm were prepared by a hydrothermal method, and then coated with different contents of AgCl to form heterostructured AgCl/Bi₂WO₆ microspheres. The prepared Bi₂WO₆ and AgCl/Bi₂WO₆ photocatalysts were characterized by X-ray diffraction, N₂ physical adsorption, scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, and ultraviolet-visible diffuse reflectance spectroscopy. The photocatalytic activity of the catalysts was evaluated by photocatalytic degradation of rhodamine B under ultraviolet and visible light irradiation. Results showed that the deposition of AgCl had no obvious effect on the light absorption and surface properties of Bi₂WO₆. However, the heterostructured AgCl/Bi₂WO₆ photocatalysts exhibited considerably higher activity than the pure AgCl and Bi₂WO₆ catalysts. With the optimal AgCl content of 20 wt%, the photocatalytic activity of the heterostructured AgCl/Bi₂WO₆ catalyst was increased under both ultraviolet and visible light compared with that of Bi₂WO₆. The main reason for the enhanced photocatalytic activity is attributed to the formation of AgCl/Bi₂WO₆ heterostructures effectively suppressing the recombination of photogenerated electrons and holes.

Key words: Microsphere, Silver chloride, Bismuth tungstate, Heterostructure, Photocatalysis, Rhodamine B

李家德, 余长林, 方稳, 朱丽华, 周晚琴, 樊启哲. 异质结构AgCl/Bi₂WO₆微米球制备、表征及其光催化性能[J]. 催化学报, 2015, 36(7): 987-993.

Jia-de Li, Chang-lin Yu, Wen Fang, Li-hua Zhu, Wan-qin Zhou, Qi-zhe Fan . Preparation, characterization and photocatalytic performance of heterostructured AgCl/Bi₂WO₆ microspheres[J]. Chinese Journal of Catalysis, 2015, 36(7): 987-993.

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异质结构AgCl/Bi₂WO₆微米球制备、表征及其光催化性能

Preparation, characterization and photocatalytic performance of heterostructured AgCl/Bi₂WO₆ microspheres

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