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Blue photoluminescent properties of pure nanostructured γ–Al2O3

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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.

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Authors and Affiliations

  1. Department of Chemistry, Nanjing Normal University, Nanjing, 210097, People’s Republic of China

    Zhong Qing Yu, Dao Chang & Cun Li

  2. Department of Physics, Nanjing Normal University, 210097, Nanjing, People’s Republic of China

    Ning Zhang

  3. The Laboratory Center of Chemistry and Physics, Nanjing Normal University, 210097, Nanjing, People’s Republic of China

    Yu Ying Feng

  4. Department of Chemical Engineering, Tsinghun University, Beijing, People’s Republic of China

    You Yuan Dai

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  1. Zhong Qing Yu
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  2. Dao Chang
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  3. Cun Li
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  4. Ning Zhang
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  5. Yu Ying Feng
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Yu, Z.Q., Chang, D., Li, C. et al. Blue photoluminescent properties of pure nanostructured γ–Al2O3. Journal of Materials Research 16, 1890–1893 (2001). https://doi.org/10.1557/JMR.2001.0259

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  • DOI: https://doi.org/10.1557/JMR.2001.0259

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