物理化学学报 >> 2016, Vol. 32 >> Issue (6): 1519-1526.doi: 10.3866/PKU.WHXB201603242

论文 上一篇    下一篇

回流法制备高分散性磷酸铋光催化剂

朱凯健1,姚文清2,朱永法2,1,*()   

  1. 1 南京工业大学先进材料研究院,南京210009
    2 清华大学化学系,北京100084
  • 收稿日期:2016-01-05 发布日期:2016-06-03
  • 通讯作者: 朱永法 E-mail:zhuyf@tsinghua.edu.cn
  • 基金资助:
    国家重点基础研究发展规划项目(9732013CB632403);国家自然科学基金(21437003)

Preparation of Bismuth Phosphate Photocatalyst with High Dispersion by Refluxing Method

Kai-Jian ZHU1,Wen-Qing YAO2,Yong-Fa ZHU2,1,*()   

  1. 1 Institute of Advanced Materials, Nanjing Tech University, Nanjing 210009, P. R. China
    2 Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
  • Received:2016-01-05 Published:2016-06-03
  • Contact: Yong-Fa ZHU E-mail:zhuyf@tsinghua.edu.cn
  • Supported by:
    The project was supported by the National Key Basic Research Program of China(9732013CB632403);National Natural Science Foundation of China(21437003)

摘要:

以乙二醇为溶剂,通过加热回流法合成了高分散性的磷酸铋光催化剂,揭示了回流温度、回流时间对形貌结构与光催化性能的影响规律。研究表明六方相磷酸铋可以通过溶剂回流过程,实现从六方相到单斜相的可控相变。该高分散磷酸铋光催化剂对亚甲基蓝溶液的降解能力随回流温度和时间增加呈先增大后减小的规律变化,在130 ℃回流2 h所制备的磷酸铋光催化剂拥有最好的活性,表观动力学常数k为0.161 min-1。通过乙二醇回流,能在磷酸铋表面引入了羟基基团,使磷酸铋在水中分散稳定性大幅提高。

关键词: 回流法, 磷酸铋, 光催化, 分散性

Abstract:

BiPO4 photocatalysts were synthesized by refluxing in ethylene glycol, and the effects of reaction temperature and reaction time on the BiPO4 crystal structure, morphology, and properties were investigated. The crystal form of BiPO4 changed from hexagonal to monoclinic on refluxing in the solvent. The produced BiPO4 photocatalysts showed good activities in photodegradation of methylene blue, and the activity could be adjusted by changing the refluxing temperature and time. BiPO4 showed the best catalytic properties when the refluxing time was 2 h at 130 ℃; the kinetic constant was 0.161 min-1. The BiPO4 dispersibility was still high after standing for 2 d, because of the introduction of surface hydroxy groups by refluxing in ethylene glycol.

Key words: Refluxing, Bismuth phosphate, Photocatalysis, Dispersibility

MSC2000: 

  • O643