Synthesis and Optic Properties of Sulfide/Silica Nanocomposite Material†

doi:10.7503/cjcu20140683

Abstract

Abstract:

In conventional methods to preparation silica, it is inevitably to use the acid or basic catalysts, which have a destructive effect on molecules or particles that are sensitive to pH. These methods have significant limitations in the preparation of the silica composites materials. Therefore, it is still a great challenge to find a mild way to synthesize silica. In this paper, we used synthesized of alanine cadmium as a precursor of the nanoparcitles, taking advantage of the amine group in the alanine cadmium molecule as catalyst to catalyze siloxane hydrolysis and condensation without added acid or basic catalysts, meanwhile, the alanine cadmium was introduced to the silica. Then the CdS nanoparcitles were prepared by in situ the way of vulcanization. The characterization of the material through Fourier transform infrared spectroscopy, proton nuclear magnetic resonance, ultraviolet-visible spectrum, fluorescence microscopy and transmission electron microscopy shows that the nanocomposites material with the CdS particle uniformly distribution in silica are synthesized. The material has excellent fluorescence properties.

Key words: Amino acid, CdS, Silica, Nanocomposite material, Fluorescence property

CLC Number:

O649
O631

TrendMD:

XU Linxu, CUI Fang, WANG Hao, YAO Tongjie, CUI Tieyu. Synthesis and Optic Properties of Sulfide/Silica Nanocomposite Material^†[J]. Chem. J. Chinese Universities, 2014, 35(12): 2694.

Figures/Tables 5

Fig.1 FTIR spectrum(A) and 1H NMR spectrum(B) of β-alanine cadmium

Fig.2 FTIR spectra of β-alanine cadmium/SiO2(a), CdS/SiO2 vulcanized after calcination(b) and CdS/SiO2 vulcanized directly(c)

Fig.3 TEM images of β-alanine cadmium/SiO2(A), CdS/SiO2 vulcanized after calcination(B) and CdS/SiO2 vulcanized directly(C)

Fig.4 UV-Vis spectra(A) and solid state photoluminescent spectra(B) of CdS/SiO2 vulcanized directly(a) and vulcanized after calcination(b)

Fig.5 Microscopy photos(A, C) and fluorescent microcopy photos(B, D) of CdS/SiO2 vulcanized directly(A, B) and after calcination(C, D)

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