无机材料学报 ›› 2018, Vol. 33 ›› Issue (8): 919-922.DOI: 10.15541/jim20170601

所属专题: 光催化材料与技术

• • 上一篇    

合成具有高效光催化活性的片状β-Bi2O3的一种新方法

陈军1, 湛菁1, 丁风华1, 李启厚1, 汤依伟2   

  1. 1. 中南大学 冶金与环境学院, 长沙 410083;
    2. 广东佳纳能源科技有限公司, 清远 513056
  • 收稿日期:2017-12-18 出版日期:2018-08-28 网络出版日期:2018-07-17
  • 作者简介:陈军. E-mail: 43994071@qq.com

Novel Synthesis Method of Sheet-like Agglomerateβ-Bi2O3 with High Photocatalytic Activity

CHEN Jun1, ZHAN Jing1, DING Feng-Hua1, LI Qi-Hou1, TANG Yi-Wei2   

  1. 1. School of Metallurgy and Environment, Central South University, Changsha 410083, China;
    2. Guangdong Jiana Energy Technology Co. Ltd., Qingyuan 513056, China
  • Received:2017-12-18 Published:2018-08-28 Online:2018-07-17
  • About author:CHEN Jun (1993?), male, candidate of Master degree. E-mail: 43994071@qq.com
  • Supported by:
    Foundation item: Jiana Foundation of Central South University (JNJJ201613);Nonferrous Foundation of the Hunan Province (2010SK2010)

摘要:

采用萃取-反萃-热分解法以辉铋矿的盐酸浸出液为原料制备了层片状的β-Bi2O3。所制备的样品分别用X衍射仪及透射电镜对其物相及形貌进行表征, 以罗丹明B为污染物研究了其光催化活性。结果表明: 所制备的β-Bi2O3是一种层状的纳米片, 具有较低的禁带宽度。在实验条件下, 对罗丹明B进行4 h的降解, 降解率达到99.23%, 样品的重复降解实验还表现出良好的循环稳定性。

 

关键词: β-Bi2O3;, 辉铋矿浸出液, 萃取, 反萃, 降解

Abstract:

Sheet-like agglomerates β-Bi2O3 were synthesized via an extraction-precipitation stripping-decomposition method using a leaching solution of bismuthinite as raw materials in acidic chloride media. Phase form of as-prepared Bi2O3 was confirmed by X-ray diffraction (XRD) and its morphology was observed by scanning electron microscope (SEM) and transmission electron microscope (TEM). Moreover, photocatalytic activity of the β-Bi2O3 was evaluated by measuring the degradation of Rhodamine B (RhB) under visible light irradiation. The results showed that the powders consisted of nanoflakes. The β-Bi2O3 exhibited a smaller band gap energy and larger absorbance edge than α-Bi2O3 and reported β-Bi2O3. In addition, 99.23% of the RhB was degraded under 4 h visible light irradiation and β-Bi2O3 was a fairly stable photocatalyst under the experimental conditions.

Key words: β-Bi2O3;, leaching solution from bismuthinite, extraction, stripping precipitation, degradation

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