Synthesis and Visible Light Photocatalytic Activity of Spinel MAl2O4 (M=Mg, Zn, Cu)

Yan Yan Jiang; Ji Wen Zhang; Zhi Qiang Hu; Jing Xiao Liu

doi:10.4028/www.scientific.net/AMM.455.99

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 455Synthesis and Visible Light Photocatalytic...

Synthesis and Visible Light Photocatalytic Activity of Spinel MAl₂O₄(M=Mg, Zn, Cu)

Abstract:

Aluminium spinel MAl₂O₄ (M = Mg, Zn, Cu) photocatalysts were prepared by a sol-gel method. The prepared samples were characterized by X-ray diffraction and transmission electron microscope. The results indicated that the samples possess a single spinel-type structure. Ultraviolet-visible diffuse reflectance spectra showed an extension of light absorption into the visible region. The spinel MAl₂O₄ photocatalysts exhibited high photocatalytic activity for the degradation of industrial dyes under high pressure mercury lamp and visible light irradiation, especially CuAl₂O₄. With the decrease of band gap of MAl₂O₄ (M = Mg, Zn, Cu), the photocatalytic activity increases. The possible reasons are discussed from the crystal field theory and energy band theory. These characteristics make the aluminium spinel MAl₂O₄ (M = Mg, Zn, Cu) photocatalysts to be promising candidates for the photocatalytic degradation of dyes.

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Applied Mechanics and Materials (Volume 455)

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99-105

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.455.99

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Online since:

November 2013

Authors:

Yan Yan Jiang, Ji Wen Zhang, Zhi Qiang Hu, Jing Xiao Liu

Keywords:

Aluminium Spinel, Degradation, Photocatalyst, Photocatalytic Activity, Sol-Gel Method

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