以Bi(NO3)3·5H2O、Na2WO4·2H2O为原料,NaOH为矿化剂,采用水热法合成Bi2WO6纳米晶体,并使用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)对其进行表征,分析了反应时间和温度对晶体生长的影响.利用Johnson-Mehl-Avrami(JMA)方程对不同温度下Bi2WO6的水热晶化过程进行动力学模拟分析.结果表明,120～200℃范围内的Avrami指数n随水热反应温度的升高而增长,n介于0.5～1之间.Bi2WO6纳米晶体的水热晶化过程表现为较低温度下的扩散控制生长以及较高温度(T＞ 160℃)下的相界控制生长.同时,Bi2WO6纳米晶体的生长经历了一个成核、积聚和熟化的过程.
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