物理化学学报 >> 2012, Vol. 28 >> Issue (12): 2911-2916.doi: 10.3866/PKU.WHXB201208011

催化和表面科学 上一篇    下一篇

柠檬酸络合法制备质子化层状钙钛矿K0.5La0.5Bi2Ta2O9及其光解水制氢性能

陈威1, 高寒阳1, 杨俞1, 林培宾1, 袁坚1, 上官文峰1, 苏佳纯2, 孙洋洲2   

  1. 1 上海交通大学机械与动力工程学院燃烧与环境技术中心, 上海 200240;
    2 中海油新能源投资有限责任公司, 北京 100016
  • 收稿日期:2012-07-06 修回日期:2012-07-27 发布日期:2012-11-14
  • 通讯作者: 上官文峰 E-mail:Shangguan@sjtu.edu.cn
  • 基金资助:

    国家重点基础研究发展计划(973计划)(2009CN220000)及国家自然科学基金(20973110)资助项目

Polymerizable Complex Synthesis of Protonated Form of Layered Perovskite K0.5La0.5Bi2Ta2O9 for Water Splitting into Hydrogen

CHEN Wei1, GAO Han-Yang1, YANG Yu1, LIN Pei-Bin1, YUAN Jian1, SHANGGUAN Wen-Feng1, SU Jia-Chun2, SUN Yang-Zhou2   

  1. 1 Research Center for Combustion and Environmental Technology, Shanghai Jiao Tong University, Shanghai 200240, P. R. China;
    2 CNOOC New Energy Investment Co. Ltd. Beijing 100016, P. R. China
  • Received:2012-07-06 Revised:2012-07-27 Published:2012-11-14
  • Supported by:

    The project was supported by the National Key Basic Research and Development Program(973) (2009CN220000) and National Natural Science Foundation of China (20973110).

摘要:

采用柠檬酸络合法制备铋层钙钛矿K0.5La0.5Bi2Ta2O9 (KLBT), 通过酸化处理得到质子化层状钙钛矿H1.9K0.3La0.5Bi0.1Ta2O7(HKLBT)光催化剂, 并通过热重-差热(TG-DSC)、X射线衍射(XRD)、紫外-可见漫反射(DRS)、X射线光电子能谱(XPS)等技术对其进行了表征和分析.考察了前驱体KLBT的不同焙烧温度对HKLBT制氢活性的影响. 结果表明, 柠檬酸络合法能在较低温度下合成高结晶度纯相HKLBT, 前驱体经900℃焙烧制备的HKLBT催化剂活性最高, 在纯水中的产氢速率达236.6μmol·h-1; 长时间活性测试表明HKLBT具有完全分解水同时产氢产氧能力,且具有较好的稳定性.

关键词: 光催化, 水分解, 层状钙钛矿, 酸化

Abstract:

The protonated layered perovskite oxide H1.9K0.3La0.5Bi0.1Ta2O7 (HKLBT) was prepared from K0.5La0.5Bi2Ta2O9 (KLBT) by H ion-exchange, and subsequently characterized by thermogravimetric analysis (TG-DSC), X-ray diffraction (XRD), UV-Vis diffuse reflectance spectroscopy (DRS), and X-ray photoelectron spectroscopy (XPS). The effects of the calcining temperature on the material's photocatalytic activity were also investigated. Results showed that HKLBT with high crystalline quality could be synthesized at low temperatures and that HKLBT prepared from KLBT calcined at 900℃ exhibited the greatest photocatalytic activity, with an average water splitting hydrogen evolution rate of 236.6 μmol·h-1 in pure water. The time course of water splitting indicated HKLBT has ability to split water into hydrogen and oxygen with long-term stability.

Key words: Photocatalysis, Water splitting, Layered perovskite, Acid treatment

MSC2000: 

  • O643