氮掺杂Bi2O3光催化剂的制备及其可见光催化性能

doi:10.3724/SP.J.1077.2012.00643

无机材料学报 ›› 2012, Vol. 27 ›› Issue (6): 643-648.DOI: 10.3724/SP.J.1077.2012.00643 CSTR: 32189.14.SP.J.1077.2012.00643

氮掺杂Bi₂O₃光催化剂的制备及其可见光催化性能

卢远刚, 杨迎春, 叶芝祥, 刘盛余

(成都信息工程学院资源环境学院, 大气环境模拟与污染控制四川省高校重点实验室, 成都 610225)

收稿日期:2011-08-08 修回日期:2011-09-20 出版日期:2012-06-20 网络出版日期:2012-05-07
作者简介:卢远刚(1985-), 男, 硕士研究生. E-mail: luyuan0920@126.com
基金资助:
四川省教育厅重点基金项目(07ZA012)

Preparation and Visible Light Responsive Photocatalytic Activity of Nitrogen-doped Bi₂O₃ Photocatalyst

LU Yuan-Gang, YANG Ying-Chun, YE Zhi-Xiang, LIU Sheng-Yu

(Department of Resources and Environment, Air Environmental Modeling and Pollution Controlling Key Laboratory of Sichuan Higher Education Institutes, Chengdu University of Information Technology, Chengdu 610225, China)

Received:2011-08-08 Revised:2011-09-20 Published:2012-06-20 Online:2012-05-07
About author:LU Yuan-Gang. E-mail: luyuan0920@126.com
Supported by:
Scientific Reserch Fund of Sichuan Provincial Education Department (07ZA012)

摘要/Abstract

摘要： 以硝酸铋和六次甲基四胺为原料, 采用沉淀法合成了不同氮掺杂量的Bi₂O₃(N-Bi₂O₃)粉体, 并采用XRD、FT-IR、XPS、UV-Vis、PL手段对其晶相结构和光谱特征等进行了表征. 研究结果表明, 未掺杂Bi₂O₃为单斜相α-Bi₂O₃, 氮掺杂Bi₂O₃则为四方相β-Bi₂O₃和Bi₅O₇NO₃组成的混晶, 氮原子替代了Bi₂O₃晶格中部分氧原子, 形成了Bi-N键而稳定存在. 氮掺杂能促进β-Bi₂O₃的生成. 与未掺杂Bi₂O₃粉体相比, 氮掺杂样品的吸收带边发生了明显红移, 荧光强度明显减弱. 甲基橙在可见光下的降解实验表明, 氮掺杂Bi₂O₃具有良好的可见光催化活性.

关键词: Bi₂O₃, 氮掺杂, 可见光, 光催化, 甲基橙

Abstract: Bi₂O₃ photocatalysts doped with different amounts of nitrogen were synthesized by a precipitation method using bismuth nitrate and hexamethylenetetramine as precursors. The as-synthesized samples were characterized and analyzed by XRD, FT-IR, XPS, UV-Vis and PL. The results indicate that the undoped Bi₂O₃displays a single monoclinic phase. While the N-doped Bi₂O₃ samples are mixed crystals, which were composed of tetragonal β-Bi₂O₃ and Bi₅O₇NO₃ phases. The oxygen in the lattice of Bi₂O₃ is partially substituted by nitrogen atom, existed stably in the form of Bi-N bond. Meanwhile, nitrogen dopant promotes the formation of β-Bi₂O₃ phase. Compared with undoped Bi₂O₃, the light absorption property of N-doped Bi₂O₃ has apparently extended into visible light region and the fluorescence intensity decreases evidently. Furthermore, the photodegradation performance of methyl orange shows that N-doped Bi₂O₃ samples have excellent visible light photocatalytic activity.

Key words: Bi₂O₃, nitrogen-doped, visible light, photocatalysis, methyl orange

中图分类号:

O643

卢远刚, 杨迎春, 叶芝祥, 刘盛余. 氮掺杂Bi₂O₃光催化剂的制备及其可见光催化性能[J]. 无机材料学报, 2012, 27(6): 643-648.

LU Yuan-Gang, YANG Ying-Chun, YE Zhi-Xiang, LIU Sheng-Yu. Preparation and Visible Light Responsive Photocatalytic Activity of Nitrogen-doped Bi₂O₃ Photocatalyst[J]. Journal of Inorganic Materials, 2012, 27(6): 643-648.

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氮掺杂Bi₂O₃光催化剂的制备及其可见光催化性能

Preparation and Visible Light Responsive Photocatalytic Activity of Nitrogen-doped Bi₂O₃ Photocatalyst

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