| 不同粒度八面体纳米钼酸镉的表面热力学性质 |
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| 引用本文： | 刘晓林,范高超,黄在银,刘作娇,王腾辉,谭学才.不同粒度八面体纳米钼酸镉的表面热力学性质[J].中国科学:化学,2014(10):1585-1590. |
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| 作者姓名： | 刘晓林 范高超 黄在银 刘作娇 王腾辉 谭学才 |
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| 作者单位： | 广西民族大学化学化工学院;广西林产化学与工程重点实验室; |
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| 基金项目： | 国家自然科学基金(20963001,21273050)资助 |
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| 摘 要： | 室温条件下,采用反相微乳液法制备了一系列不同粒度的八面体纳米CdMoO4,并对其组成、结构及形貌进行了表征.基于纳米CdMoO4与块体CdMoO4热力学性质的本质差异,结合化学热力学基本理论与热动力学原理,导出了获取纳米CdMoO4表面热力学性质的关系式;在此基础上,利用原位微量热技术成功获得了所制备的不同粒度八面体纳米CdMoO4的表面热力学函数,如比表面Gibbs自由能、比表面焓和比表面熵.本文为获取纳米材料表面热力学函数提供了一种有效而普适的新方法.
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| 关 键 词： | 钼酸镉 八面体 微乳液法 表面热力学 微量热技术 |
Surface thermodynamic properties of different-sized nano octahedral cadmium molybdate |
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| Institution: | LIU XiaoLin,FAN GaoChao,HUANG ZaiYin,LIU ZuoJiao,WANG TengHui,TAN XueCai(1 College of Chemistry and Chemical Engineering, Guangxi University for Nationalities, Nanning 530006, China; 2 Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Nanning 530006, China) |
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| Abstract: | A series of nano octahedral CdMoO4 with different sizes were prepared by reverse-microemulsion method at room temperature, and the constitute, structure and morphology were characterized. Based on the essential difference between thermodynamic properties of nano CdMoO4 and bulk CdMoO4, the equations for acquiring surface thermodynamic properties of nano CdMoO4 were derived via combining the basic theory of chemical thermodynamics with thermokinetics theory. According to the derived equations, surface thermodynamic functions such as specific surface Gibbs free energy, specific surface enthalpy and specific surface entropy of the prepared nano octahedral CdMoO4 at 298.15 K were successfully gained by in situ microcalorimetry. Briefly, this work presented an effective and general method to obtain thermodynamic functions of nano materials. |
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| Keywords: | CdMoO4 octahedron microemulsion method surface thermodynamics microcalorimetry |
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