A Novel Visible-Light-Driven Semiconductor Photocatalyst: Nano-Yttrium Manganite

doi:10.3724/SP.J.1088.2011.10151

Abstract

Abstract: Yttrium manganite (YMnO₃) nanoparticles were prepared by a polyacrylamide gel technique. X-ray diffraction analysis indicates that the as-synthesized YMnO₃ nanocrystallites crystallize majorly into a hexagonal perovskite structure and minorly into an orthorhombic perovskite structure without the presence of any other impurities. Scanning electron microscope observation shows that the prepared YMnO₃ nanoparticles are regularly spherical in shape and highly uniform in size with an average diameter of about 45 nm. Ultraviolet-visible diffuse reflectance spectroscopy was used to investigate the light-absorbing properties of YMnO₃ nanoparticles, and the value of the optical bandgap energy is obtained to be 1.31 eV. The photocatalytic activity of YMnO₃ nanoparticles was investigated by the degradation of methyl red. The experimental results reveal that the nano-YMnO₃ exhibits a pronounced photocatalytic activity for methyl red decomposition under ultraviolet and visible light irradiation.

Key words: polyacrylamide gel technique, yttrium manganite, nanoparticles, methyl red, photocatalytic activity

WANG Shi-Fa, YANG Hua, XIAN Tao. A Novel Visible-Light-Driven Semiconductor Photocatalyst: Nano-Yttrium Manganite[J]. Chinese Journal of Catalysis, 2011, 32(7): 1199-1203.

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