溶胶凝胶法制备CdS/SiO_2量子点玻璃的研究

doi:10.3866/PKU.WHXB19960709

CORC > 北京大学 > 化学与分子工程学院

	溶胶凝胶法制备CdS/SiO_2量子点玻璃的研究; Study on CdS/SiO2 Quantum-dot-glass Prepared by Sol-get Method
	黄建滨 ; 戴庆红 ; 郭国霖 ; 桂琳琳
刊名	物理化学学报
	1996
关键词	溶胶凝胶法量子点玻璃纳米超细微粒吸收边界蓝移量子效应 Sol-gel process Quantum dot glass Nanocomposite Absorption edge blue shift Quantum size effect
DOI	10.3866/PKU.WHXB19960709
英文摘要	通过溶胶凝胶转变过程制备了硫化镉／二氧化硅量子点复合玻璃材料（硫化镉在复合材料中的最大掺杂质量比可达到30％）；并针对两种催化剂对复合体系的不同影响对这一类体系的物理化学性质进行了较为系统的研究．复合体系的溶胶凝胶转变点可通过对复合溶胶粘度随时间变化的观测而确定．TEM法与低频Raman散射法的测定表明实验制备的样品中CdS颗粒基本为nm级的球形粒子。其CdS颗粒粒径随CdS含量增加而增大。随CdS／SiO2量子点玻璃材料中CdS颗粒粒径的减小，其吸收光谱中的吸收边界与常规尺寸颗粒的吸收光谱边界相比有明显的蓝移，体现出显著的量子效应．适宜的热处理过程对复合材料中CdS颗粒粒径的减小和量子效应的...; The sol-gel process has been applied to the preparation of small size CdS crystal doped silica glasses. Silica glasses containing 0.88 similar to 30 w % Cds were synthesized in a process which includes two-stpe hydrolysis of Si(OC2H5)(4) and Cd(CH3COO)(2)center dot 2H(2)O. drying and heating of dotted gels, and reaction by exposing the porous glass of CdO/SiO2 to H2S gas. The sol-gel transition point was determined by measuring the variation of the viscosity with hydrolysis lime, It was found that the gel point was inns led by the Cd(CH3COO)(2)center dot 2H(2)O content and kinds of acid-catalyst (II NO3 or HCI). About 2 cm diameter monolueth dry gel was obtained in the seated box in which micro-environment(humidity, temperature and chemical atmosphere etc.) was automatically controlled by the computer. From the results of the low frequency inelastic Raman scattering and transmission electron micrographs, CdS crystals were 1.6 to 8.4 nm in diameter for different doped systems. In the optical absorption specific, the absorption edge exhibited a blue shift compared with that of the bulk CdS. Thus the quantum size effect was found for glasses containing CAS prepared by the sol-gel process,; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000207600000009&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; SCI(E); 中文核心期刊要目总览(PKU); 中国科学引文数据库(CSCD); 1; 07; 621-628; 12
语种	中文
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/84194]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	黄建滨,戴庆红,郭国霖,等. 溶胶凝胶法制备CdS/SiO_2量子点玻璃的研究, Study on CdS/SiO2 Quantum-dot-glass Prepared by Sol-get Method[J]. 物理化学学报,1996.
APA	黄建滨,戴庆红,郭国霖,&桂琳琳.(1996).溶胶凝胶法制备CdS/SiO_2量子点玻璃的研究.物理化学学报.
MLA	黄建滨,et al."溶胶凝胶法制备CdS/SiO_2量子点玻璃的研究".物理化学学报 (1996).