Photocatalytic Efficiency for Dye Decolorization of the UV/TiO₂, UV/TiO₂ + In₂O₃ and UV/TiO₂-In₂O₃ Systems

Abstract:

This study explored the decolorization of C.I. Reactive Red 2 (RR2) by the ultraviolet (UV)/TiO₂, UV/TiO₂ + In₂O₃, and UV/TiO₂-In₂O₃ systems. The TiO₂-In₂O₃ was generated by the sol-gel method and TiO₂ + In₂O₃ was created by mixing TiO₂ and In₂O₃ powders. The surface properties of TiO₂, In₂O₃, and TiO₂-In₂O₃ were analyzed by X-ray diffraction, a specific surface area analyzer, UV-vis spectroscopy, and scanning electron microscopy. The specific surface area of TiO₂, In₂O₃, and TiO₂-In₂O₃ was 29.5, 44.6, and 35.7 m²/g, respectively; additionally, the band gap of TiO₂, In₂O₃, and TiO₂-In₂O₃ was 2.95, 2.64, and 2.91 eV; respectively. The decolorization rate constant fit pseudo-first-order kinetics and that of the UV/TiO₂, UV/TiO₂ + In₂O₃, and UV/TiO₂-In₂O₃ systems was 0.0023, 0.0031, and 0.0072 min^-1; respectively.

• Periodical: Advanced Materials Research (Volume 831)
• Pages: 263-266
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.831.263
• Online since: December 2013
• Authors: Chung Hsin Wu*, Chao Yin Kuo, Chih Hao Lai, Wei Yang Chung
• Keywords: Decolorization, In₂O₃ , Photodegradation, TiO₂

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