高等学校化学学报 ›› 2017, Vol. 38 ›› Issue (11): 2045-2052.doi: 10.7503/cjcu20160894

• 物理化学 • 上一篇    下一篇

共模板法一步合成绣球状BiOCl/Br固溶体光催化剂

陈颖(), 赵宇, 李静, 韩星月   

  1. 东北石油大学化学化工学院, 大庆 163318
  • 收稿日期:2016-12-12 出版日期:2017-11-10 发布日期:2017-09-27
  • 作者简介:联系人简介: 陈 颖, 女, 博士, 教授, 主要从事能源纳米材料研究. E-mail: 1911163125@qq.com
  • 基金资助:
    国家自然科学基金(批准号: 51146008)资助

One-step Synthesis of Hydrangea-like BiOCl/Br Solid Solution Photocatalyst with Co-template Method

CHEN Ying*(), ZHAO Yu, LI Jing, HAN Xingyue   

  1. School of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing 163318, China
  • Received:2016-12-12 Online:2017-11-10 Published:2017-09-27
  • Contact: CHEN Ying E-mail:1911163125@qq.com
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No.51146008)

摘要:

以乙二醇/十二烷基三甲基溴化铵(EG/DTAB)为共模板剂, 一步制得BiOCl/Br的固溶体光催化剂, 利用X射线衍射仪、 扫描电子显微镜、 能谱仪、 N2吸附-脱附仪和紫外-可见漫反射光谱仪进行了表征. 结果表明, 与采用溶剂热法制得的BiOCl分级微球相比, 采用EG/DTAB共模板法制得的BiOCl/Br固溶体具有更明显的分层结构, 呈绣球状. 同时, DTAB的Br-插入到BiOCl的晶格中, 形成固溶体, 减小了禁带宽度. 绣球状BiOCl/Br固溶体具有比商用P25、 二维BiOCl纳米片和三维BiOCl分级微球更优异的可见光间接敏化降解染料性能, 当nDTAB/nKCl=0.75时, 制得的BiOCl/Br固溶体8 min内在可见光下对罗丹明B(RhB)的降解率达到97.2%; 1 h后在可见光下对甲基橙(MO)的降解率达到83.6%.

关键词: 共模板法, 乙二醇/十二烷基三甲基溴化铵, 绣球状BiOCl/Br固溶体光催化剂

Abstract:

Hydrangea-like BiOCl/Br solid solution photocatalysts were prepared by using glycol/dodecyl trimethyl amonium bromide(EG/DTAB) co-template in one step. The catarysts were characterized by X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, N2 adsorption-desorption, and UV-Vis diffuse reflectance spectroscopy. The results showed that the BiOCl/Br solid solution obtained by the EG/DTAB co-template method had a layered structure like hydrangea, different from BiOCl hierarchical microspheres prepared by solvothermal method; the Br- of DTAB was inserted into the lattice of BiOCl to form a solid solution, reducing the band gap of BiOCl. Hydrangea-like BiOCl/Br solid solution showed excellent photocatalytic activity for degradation of rhodamine B(RhB) and methyl orange(MO) under visible light irradiation. When the molar ratio of DTAB to KCl was 0.75, the photocatalytic degradation rate of RhB was 97.2% within 8 min, and that of MO was 83.6% with 1 h.

Key words: Co-template method, Glycol/dodecyl trimethyl amonium bromide(EG/DTAB), Hydrangea-like BiOCl/Br solid solution photocatalyst

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