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.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
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
关键词
硫化镉
微波水热法
球形团簇
光学性能
微观形貌
cadmium sulfide
microwave hydrothermal
sphere-like cluster-shaped structure
optical property
microstructure
