硅酸盐学报

微波水热法制备CdS球形团簇

单位：1. 教育部轻化工助剂化学与技术重点实验室陕西科技大学西安 710021 2. 同济大学材料科学与工程学院上海 201804

分类号：TQ132.4+4

出版年,卷(期):页码：2012,40(11):1652-1659

DOI：

摘要：

摘要：以醋酸镉[Cd(CH3COO)2?2H2O]和硫代硫酸钠(Na2S2O3?5H2O)为镉源和硫源，采用微波水热法制备了具有球形团簇结构的CdS微晶。研究了微波水热温度、时间以及n(S)/n(Cd)(摩尔比)等因素对合成CdS团簇结构的物相和微观形貌的影响以及样品的光学性能。结果表明：以Cd(CH3COO)2?2H2O为镉源合成的CdS微晶具有球形团簇结构的特殊形貌，CH3COO–在形成该球形团簇结构的过程中起到了模板剂的作用。水热反应温度升高与时间延长有利于产物结晶性增强，晶粒尺寸也会随之增大。随着n(S)/n(Cd)的增大，产物CdS会出现由团簇结构逐渐转变为准球形结构的规律变化。UV–Vis光谱研究表明，所制备的CdS微晶具有较强的可见光吸收特性，存在一定红移现象。

Abstract: CdS microcrystalline with a sphere-like cluster-shaped structure was prepared with cadmium acetate (Cd(CH3COO)2?2H2O) and sodium thiosulfate (Na2S2O3) as raw materials by a microwave hydrothermal process. The influences of microwave hydrothermal temperature and time, and S/Cd mole ratio on the phase composition and morphologies of the product were investigated. The optical property of the sphere-like cluster-shaped CdS crystallites was analyzed. The results indicate that the CdS microcrystalline prepared with cadmium acetate as a cadmium source obtains the special morphology of sphere-like cluster-shaped structure. The CH3COO– played a template role in the formation process of the sphere-like cluster-shaped CdS crystalline.The crystallization and grain size of CdS microcrystalline increased gradually with increasing hydrothermal temperature and reaction time. The morphology of prepared CdS transformed from sphere-like cluster-shaped structure to quasi-sphere shaped structure when S/Cd molar ratio increased. According to the analysis of the ultraviolet?visible absorption spectra, the CdS samples had a strong absorption in visible region with an obvious red shift.

基金项目：

陕西省国际科技合作重点项目(2011KW-11)；陕西省教育厅自然科学专项基金(2010JK444)；陕西省自然科学基金(2010- JM6001)；陕西科技大学研究生创新基金项目资助。

作者简介：

第一作者：张钦峰(1986—)，男，硕士。通信作者：黄剑锋(1970—)，男，博士，教授。

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