Chemical Precipitation Synthesis and Optical Properties of ZnO/SiO2 Nanocomposites
Huaming Yang,
Yu Xiao, Kun Liu, Qiming Feng,
Huaming Yang
Department of Inorganic Materials, School of Resources Processing and Bioengineering, Central South University, Changsha 410083, China
Search for more papers by this authorQiming Feng
Search for more papers by this authorHuaming Yang,
Yu Xiao, Kun Liu, Qiming Feng,
Huaming Yang
Department of Inorganic Materials, School of Resources Processing and Bioengineering, Central South University, Changsha 410083, China
Search for more papers by this authorQiming Feng
Search for more papers by this author The American Ceramic Society,
The American Ceramic Society
Search for more papers by this authorBook Author(s): The American Ceramic Society,
The American Ceramic Society
Search for more papers by this authorFirst published: 01 December 2009
Summary
In this chapter, SiO2 nanowires, made from natural chrysotile, are used to synthesize zinc oxide (ZnO)/SiO2 composites by chemical precipitation. The as-prepared samples are characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy, and Fourier transform infrared. Their optical properties are studied by a ultraviolet-vis spectrophotometer and a fluorescence spectrophotometer. TEM analysis shows that the size of ZnO particles in SZ8 was mainly in the range from 15 to 20 nm and dispersed uniformly on the surface of SiO2 nanowires. The photoluminescence spectra also show that ZnO/SiO2 composites have stronger emitting intensity at the blue-green band than pure ZnO synthesized under the same reaction conditions. Therefore, the composites will be of great interest in the application of luminescence material. The as-prepared ZnO/SiO2 composites can be used as photocatalysts for waste water treatment because they separate much more easily away from solution.
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