微波水热法制备CdS球形团簇  

Synthesis of Sphere-Like CdS Cluster-shaped Structure by Microwave Hydrothermal Process

作　　者：张钦峰[1] 黄剑锋[1] 胡宝云[2] 曹丽云[1] 张永亮[1] 吴建鹏[1] 

机构地区：[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

出　　处：《硅酸盐学报》2012年第11期1652-1659,共8页Journal of The Chinese Ceramic Society

基　　金：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

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。CdS microcrystaUine 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 CHHCOO- 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. Ac- cording to the analysis of the ultraviolet-visible absorption spectra, the CdS samples had a strong absorption in visible region with an obvious red shift.

关 键 词：硫化镉 微波水热法 球形团簇 光学性能 微观形貌 

分 类 号：TQ132.44[化学工程—无机化工]