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

doi:10.7503/cjcu20140947

Chem. J. Chinese Universities ›› 2015, Vol. 36 ›› Issue (2): 212.doi: 10.7503/cjcu20140947

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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 Xuecai^1,^2,³, ZHONG Lianyun¹, HUANG Zaiyin^1,^2,^3,^*()

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)

Abstract

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( $G m s$ ) 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 $G m s$ 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 $G m s$ and catalytic performance of the tetrapod, cube and dodecahedron Ag₃PO₄ decreased in order.

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

CLC Number:

O645

TrendMD:

LIU Zuojiao, FAN Gaochao, LI Xingxing, TAN Xuecai, ZHONG Lianyun, HUANG Zaiyin. Thermodynamic and Kinetic Parameters of in-situ Photocatalytic Process with Different Morphologies of Ag₃PO₄ and Their Free Energy^†[J]. Chem. J. Chinese Universities, 2015, 36(2): 212.

Figures/Tables 2

References 10

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

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