摘要
采用一种新方法，在ＴｉＯ２表面原位合成ＣｄＳ纳米微粒，并用红外光谱跟踪了ＣｄＳ／ＴｉＯ２复合纳米微粒的形成过程．紫外吸收光谱研究表明ＴｉＯ２对ＣｄＳ纳米微粒的形成有很好的稳定作用，荧光光谱研究结果表明。
A new kind of preparation method of CdS/TiO 2 coupled semiconductor nanoparticle in aqueous solution is described, in which CdS is in situ formed on the surface of TiO 2. Furthermore, coupling of the two semiconductor particles via the bifunctional thiols offers an opportunity to sensitize TiO 2 with a large bandgap and energetically low lying conduction band by CdS with a small bandgap and an energetically high lying conduction band. IR spectra were used to follow the formation process of this coupled nanoparticles. UV Vis spectra illustrated well the stability effect of TiO 2 on the formation of CdS nanoparticles. The quenching of CdS emission indicated that there were an effective charge separation between dissimilar semiconductor particles.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1998年第8期1191-1194,共4页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
关键词
复合
半导体
纳米微粒
硫化镉
合成
性质
Coupled semiconductor nanoparticles, Modification, Stabilized effect, Charge separation
