物理化学学报 >> 2013, Vol. 29 >> Issue (03): 576-584.doi: 10.3866/PKU.WHXB201301043

催化和表面科学 上一篇    下一篇

回流法可控合成BiPO4纳米棒及其光催化性能

朱艳艳1,2, 刘艳芳1, 吕艳辉1, 王华2, 凌强2, 朱永法1   

  1. 1 清华大学化学系, 北京 100084;
    2 空军装备研究院航空气象防化研究所, 北京 100085
  • 收稿日期:2012-10-24 修回日期:2013-01-04 发布日期:2013-02-25
  • 通讯作者: 朱永法 E-mail:zhuyf@tsinghua.edu.cn
  • 基金资助:

    国家自然科学基金(20925725, 50972070); 科技部创新方法工作专项及清华大学自主科研计划资助项目

Reflux Preparation and Photocatalytic Performance of Bismuth Phosphate Nanorods

ZHU Yan-Yan1,2, LIU Yan-Fang1, LÜ Yan-Hui1, WANG Hua2, LING Qiang2, ZHU Yong-Fa1   

  1. 1 Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China;
    2 Institute of Aeronautical Meteorology and Chemical Defence, Equipment Academy of Air Force, Beijing 100085, P. R. China
  • Received:2012-10-24 Revised:2013-01-04 Published:2013-02-25
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20925725, 50972070), Special Project on Innovative Method from the Ministry of Science and Technology of China and Tsinghua University Initiative Scientific Research Program, China.

摘要:

采用回流法合成了BiPO4纳米棒光催化剂, 探讨了反应时间、反应物比例、pH值和反应物浓度对BiPO4晶相结构和形貌尺寸的影响, 利用粉末X射线衍射(XRD)、透射电镜(TEM)、比表面积分析(BET)和紫外-可见漫反射光谱(UV-Vis DRS)等对产物进行了表征, 以亚甲基蓝(MB)为探针研究了其光催化活性. 反应时间和反应物浓度对产物的形貌尺寸影响较大, 反应物比例和pH值对产物晶相结构和形貌尺寸均有较大的影响, 进一步影响BiPO4光催化剂的活性. 调控各种因素后可合成出具有单斜相独居石/六方相混晶结构的高紫外光活性BiPO4纳米棒光催化剂.

关键词: 回流, 可控合成, BiPO4, 混晶结构, 光催化

Abstract:

BiPO4 nanorods were synthesized by reflux, and the effect of reaction time, reactant ratio and concentration, and pH value on BiPO4 crystal structure and morphology was investigated. Nanorods were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), specific surface area analysis (BET), and UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS). The ability of BiPO4 to photo-degrade methylene blue (MB) was investigated. The reaction time and reactant concentration influenced the product morphology. The reactant ratio and pH value had a large effect on the product crystal structure and morphology, and also on the photo-activity of BiPO4. Highly UV active BiPO4 nanorods of monoclinic monazite/hexagonal mixed crystal structure suitable for photocatalysis could be prepared by carefully controlling the above conditions.

Key words: Refluxing method, Controllable synthesis, Bismuth phosphate, Mixed crystal structure, Photocatalysis

MSC2000: 

  • O644