کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7062126 | 1459428 | 2017 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The size dependence of surface thermodynamic quantities of nano-Cu2(OH)2CO3: Theory and experimental research by thermal decomposition
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: The size dependence of surface thermodynamic quantities of nano-Cu2(OH)2CO3: Theory and experimental research by thermal decomposition The size dependence of surface thermodynamic quantities of nano-Cu2(OH)2CO3: Theory and experimental research by thermal decomposition](/preview/png/7062126.png)
چکیده انگلیسی
The peculiar chemical properties of nanoparticles are quite different from their bulk counterparts, the differences are related to their surface thermodynamic quantities, mainly depending on their particle sizes. In this paper, the relations between solid-gas surface thermodynamic quantities and particle size at constant temperature and constant volume were derived. And the theory of decomposition thermodynamics at constant temperature and constant volume was proposed and the relations of equilibrium constants and thermodynamic properties of decomposition reactions with particle size were derived respectively. Applying the theory, the method of obtaining the surface thermodynamic quantities by thermal decomposition was proposed. Experimentally, the thermal decomposition of nano-Cu2(OH)2CO3 with different particle sizes was taken as a research system, the standard equilibrium constants, the thermodynamic properties and the heat capacity difference for decomposition of nano-Cu2(OH)2CO3 with different sizes were obtained by calculating the partial pressure and the fugacity coefficient of each gas component by RK equation at different temperatures. Further, the solid-gas surface thermodynamic properties, surface tension and surface heat capacity were obtained. And the size dependence of surface thermodynamic quantities and decomposition thermodynamic quantities of nano-Cu2(OH)2CO3 are consistent with the theoretical relations above.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thermochimica Acta - Volume 658, 10 December 2017, Pages 101-109
Journal: Thermochimica Acta - Volume 658, 10 December 2017, Pages 101-109
نویسندگان
Liang Bai, Yongqiang Xue, Zixiang Cui,