Preparationand Optical Properties of CuAlO2 Microcrystallites by Complexing Sol-Gel

doi:10.3724/SP.J.1077.2011.00275

Journal of Inorganic Materials ›› 2011, Vol. 26 ›› Issue (3): 275-280.DOI: 10.3724/SP.J.1077.2011.00275

• Research Paper • Previous Articles Next Articles

Preparationand Optical Properties of CuAlO₂ Microcrystallites by Complexing Sol-Gel

LI Kang, HUANG Jian-Feng,CAO Li-Yun, WANG Bo, SHI Zhe-Yong

Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science & Technology,Xi’an 710021, China

Received:2010-05-31 Revised:2010-07-12 Published:2011-03-20 Online:2011-02-18
Supported by:
National Natural Science Foundation of China (50942047); Doctorate Foundation of Ministry of Education in China (20070708001), Foundation of New Century Excellent Talent inUniversity of China (NCET-06-0893); Natural Science Foundation of Shaanxi Province (2010JM6001); The Postgraduate Innovation Foundation of SUST

Abstract

Abstract: The microcrystalline CuAlO₂ was synthesized by complexing Sol-Gel method using citric acid as chelate.Thermal decomposition mechanism of the Gel, formation process of CuAlO₂ microcrystallites, phase structure, microstructure, grain size, etc, were investigated by TG-DTA, XRD,TEM. Results show that using copper nitrate, aluminum isopropoxide and ethyleneglycol as raw materials, citric acid as a complexing agent complexed with metalions can reduce the synthetic temperature of microcrystalline CuAlO₂.The microcrystalline delafossite-structured CuAlO₂ with smallparticles, uniform composition can be obtained at 1050 ℃. Its crystal particlesize is about 150nm in diameter. UV-Visible spectral analysis shows that the optical band gap of CuAlO₂ microcrystallite is about 3.75-4.05eV.

Key words: complexing Sol-Gel method, CuAlO₂ microcrystallites, optical band gap

CLC Number:

TB34

LI Kang, HUANG Jian-Feng,CAO Li-Yun, WANG Bo, SHI Zhe-Yong. Preparationand Optical Properties of CuAlO₂ Microcrystallites by Complexing Sol-Gel[J]. Journal of Inorganic Materials, 2011, 26(3): 275-280.

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Preparationand Optical Properties of CuAlO₂ Microcrystallites by Complexing Sol-Gel

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