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Blue photoluminescent properties of pure nanostructured γ–Al2O3

Published online by Cambridge University Press:  31 January 2011

Zhong Qing Yu ,
Dao Chang ,
Cun Li ,
Ning Zhang ,
Yu Ying Feng  and
You Yuan Dai
Zhong Qing Yu
Affiliation:
Department of Chemistry, Nanjing Normal University, Nanjing 210097, People's Republic of China
Dao Chang
Affiliation:
Department of Chemistry, Nanjing Normal University, Nanjing 210097, People's Republic of China
Cun Li
Affiliation:
Department of Chemistry, Nanjing Normal University, Nanjing 210097, People's Republic of China
Ning Zhang
Affiliation:
Department of Physics, Nanjing Normal University, Nanjing 210097, People's Republic of China
Yu Ying Feng
Affiliation:
The Laboratory Center of Chemistry and Physics, Nanjing Normal University, Nanjing 210097, People's Republic of China
You Yuan Dai
Affiliation:
Department of Chemical Engineering, Tsinghun University, Beijing, People's Republic of China
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Abstract

Blue photoluminescent emission was observed in pure nanometer-sized γ–Al2O3 powders prepared by the sol-gel process, with aluminum alkoxide as the precursor. The photoluminescent excitation spectrum detected at »em = 422 nm showed four peaks located at 238, 255, 278.5, and 348.5 nm, respectively, the first having the strongest intensity. The photoluminescent emission spectra were made up of a broad band with four peaks located at 404.5, 422, 447, and 484.5 nm. The emission band of 422 nm had the intensity. We suggest that the defect level in the nanometer alumina powder also is the main reason for the appearance of new luminescent emission bands.

Type
Rapid Communications
Information
Journal of Materials Research , Volume 16 , Issue 7 , July 2001 , pp. 1890 - 1893
Copyright
Copyright © Materials Research Society 2001

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