高等学校化学学报 ›› 2019, Vol. 40 ›› Issue (5): 959-964.doi: 10.7503/cjcu20190036

• 物理化学 • 上一篇    下一篇

Ag3PO4溶解热力学函数的晶面效应与温度效应

贺子君1, 肖明1, 马祥英1, 邱江源1, 肖碧源1, 覃方红1, 黄在银1,2()   

  1. 1. 广西民族大学化学化工学院
    2. 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:2019-01-14 出版日期:2019-05-06 发布日期:2019-03-27
  • 作者简介:

    联系人简介: 黄在银, 男, 教授, 主要从事纳米物理化学方面的研究. E-mail: huangzaiyin@163.com

  • 基金资助:
    国家自然科学基金(批准号: 21273050, 21573048, 21873022)和广西研究生教育创新计划项目(批准号: gxun-chx2s2018062)资助.

Facet and Temperature Effects on Dissolution Thermodynamic Functions of Ag3PO4 Microcrystals

HE Zijun1, XIAO Ming1, MA Xiangying1, QIU Jiangyuan1, XIAO Biyuan1, QIN Fanghong1, HUANG Zaiyin1,2,*()   

  1. 1. College of Chemistry and Chemical Engineering
    2. Guangxi Colleges and Universities Key Laboratory of Food Safety and Pharmaceutical Analytical Chemistry, Guangxi University for Nationalities, Nanning 530008, China
  • Received:2019-01-14 Online:2019-05-06 Published:2019-03-27
  • Contact: HUANG Zaiyin E-mail:huangzaiyin@163.com
  • Supported by:
    † Supported by the National Natural Science Foundation of China(Nos.21273050, 21573048, 21873022) and the Innovation Project of Guangxi Graduate Education, China(No.gxun-chxzs2018062)

摘要:

在室温下制备了立方体{100}、 四面体{111}、 菱形十二面体{110}和块体Ag3PO4微晶, 并进行了表征. 测定了其在不同温度下水溶液中的电导率, 结合强电解质溶液和溶解热力学理论, 得到了Ag3PO4微晶的溶解热力学函数. 以具有不同晶面的Ag3PO4微晶为模型, 研究了纳米材料溶解热力学函数的晶面效应和温度效应. 结果表明, 具有{110}晶面的菱形十二面体Ag3PO4的标准摩尔溶解吉布斯自由能()、 标准摩尔溶解焓()和标准摩尔溶解熵()最大, 具有{100}晶面的立方体Ag3PO4次之, 具有{111}晶面的四面体Ag3PO4最小; 溶解平衡常数(KSP)和随着温度的升高而增大.

关键词: 磷酸银, 溶解热力学, 晶面效应, 温度效应

Abstract:

Ag3PO4 microcrystals with different facets, such as {100}(cubic), {111}(tetrahedron), {110}(rhombohedral dodecahedron), and bulk Ag3PO4 microcrystals were synthesized at room temperature. Based on the difference of the conductivity between Ag3PO4 microcrystals with different facets, the dissolution thermodynamic function of Ag3PO4 microcrystals were derived via combining the theoretical formula of strong electrolyte solution and dissolution thermodynamics. According to this method, the dissolution thermodynamic functions such as standard dissolution Gibbs free energy, standard dissolution enthalpy and standard dissolution entropy of the prepared Ag3PO4 microcrystals were gained. Moreover, the facet effect and temperature effect on these obtained dissolution thermodynamic functions were discussed. The results revealed that the dissolution thermodynamic function of rhombohedral dodecahedron Ag3PO4 were maximum, followed by cubic and tetrahedron Ag3PO4 . Along with the increase of the temperature, dissolution equilibrium constant and standard dissolution Gibbs free energy increased.

Key words: Ag3PO4, Dissolution thermodynamics, Facet effect, Temperature effect

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