高等学校化学学报 ›› 2015, Vol. 36 ›› Issue (2): 212.doi: 10.7503/cjcu20140947

• 研究快报 • 上一篇    下一篇

不同形貌Ag3PO4的表面自由能及原位光催化过程的热力学和动力学参数

刘作娇1, 范高超1, 李星星1, 谭学才1,2,3, 钟莲云1, 黄在银1,2,3()   

  1. 1. 广西民族大学化学化工学院
    2. 广西林产化学与工程重点实验室
    3. 广西高校食品安全与药物分析化学重点实验室, 南宁 530008
  • 收稿日期:2014-10-27 出版日期:2015-02-10 发布日期:2015-01-22
  • 作者简介:联系人简介: 黄在银, 男, 教授, 主要从事物理化学和材料化学方面的研究. E-mail: hzy210@163.com
  • 基金资助:
    国家自然科学基金(批准号: 20963001, 21273050)资助

Thermodynamic and Kinetic Parameters of in-situ Photocatalytic Process with Different Morphologies of Ag3PO4 and Their Free Energy

LIU Zuojiao1, FAN Gaochao1, LI Xingxing1, TAN Xuecai1,2,3, ZHONG Lianyun1, HUANG Zaiyin1,2,3,*()   

  1. 1. College of Chemistry and Chemical Engineering
    2. Key Laboratory of Forest Chemistry and Engineering of Guangxi Province
    3. Guangxi Colleges and Universities Key Laboratory of Food Safety and Pharmaceutical Analytical Chemistry, Guangxi University for Nationalities, Nanning 530008, China
  • Received:2014-10-27 Online:2015-02-10 Published:2015-01-22
  • Contact: HUANG Zaiyin E-mail:hzy210@163.com
  • Supported by:
    Supported by the National Natural Science Foundation of China(Nos.20963001, 21273050)

关键词: Ag3PO4, 光催化, 形貌效应, 光量热法, 表面热力学

Abstract:

A self-designed photomicrocalorimeter was applied to obtain in-situ thermodynamic and kinetic information on photocatalysis degradation of methylene blue(MB) over different morphologies of Ag3PO4. The molar surface Gibbs free energies(Gms) of the prepared Ag3PO4 were obtained based on the thermokinetic theory and microcalorimetry. The acquired in-situ thermodynamic and kinetic information of the photocatalytic process was successfully associated with Gms and catalytic performance of the prepared Ag3O4 catalyst with different morphologies. The results revealed that the heat effect and enthalpy change rate of the tetrapod, cube and dodecahedron Ag3PO4 increased in order, whereas the Gms and catalytic performance of the tetrapod, cube and dodecahedron Ag3PO4 decreased in order.

Key words: Ag3PO4, Photocatalysis, Morphology effect, Photocalorimetry, Surface thermodynamics

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