SnO2-SnS2复合纳米粒子的制备及光电性质研究

采用离子交换法制备了SnO₂-SnS₂复合纳米粒子.用XRD、TEM和X-EDAS测定了样品的组成、结构、形貌和尺寸,结果表明,样品为SnS₂部分包覆SnO₂的球形复合纳米粒子,其平均粒径为5nm.研究了该复合纳米粒子的紫外-可见漫反射光谱和光电化学性质,观察到SnO₂-SnS₂复合纳米粒子的光吸收比SnO₂的明显向长波区扩展;制成工作电极后的光电流值和光电转换效率(IPCE)都比相应的纯组分纳米粒子电极显著提高.

Preparation and Photoelectric Properties of Nanosized Composite Particle SnO2-SnS2

A new SnO₂-SnS₂nanosized composite particle was prepared by ion exchanging re-action. The composition, structure and size of this material were determined by XRD, TEM and X-EDAS. It′s shown that in the sample the nanosized particle SnO₂was partly coated by SnS₂Its average particle size was ca . 5 nm. The properties of UV-V is diffusive reflection spectrum and photoelectric chemistry were investigated. It was observed that the absorbance range of SnO₂-SnS₂nanosized composite particle was broadened to longer wavelength area. After being prepared to be a working electrode, its value of photocurrent and IPCEwere both highly improved, compared with pure SnO₂and SnS₂electrode.