采用绿色水介质体系一步合成了3种不同尺寸的ZnO纳米片层结构.通过微热量技术获取其原位生长过程的热谱曲线,从动力学和热力学角度分析其生长机理;利用电化学方法测定了不同温度下纳米ZnO与块体ZnO原电池的电势差,结合热力学基本公式求算出ZnO纳米片层结构的热力学函数值,并与生长机理关联讨论.结果表明,ZnO纳米片层结构的生长经历了先表观吸热后表观放热,放热减慢,最后到达放热平台的热量变化阶段.标准摩尔熵、标准摩尔生成Gibbs自由能及标准摩尔生成焓均随着尺寸减小而逐渐增大.本文为纳米材料的原位生长机理与热力学函数的关联研究提供了新的思路和方法.
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