科研之友
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摘要
The development of coupled semiconductor oxides has led to significant advances in photocatalytic functional materials. In this article, we report the preparation of a nano-spherical InCrO4-loaded TiO2 photocatalyst by a simple co-precipitation method. The InCrO4-TiO2 (ICT) nanomaterial was characterized using XRD, SEM with EDX, FT-IR, FT-Raman and PL analysis. The photocatalytic activity of InCrO4-TiO2 was much better than that of TiO2 and TiO2-P25 under UV-light irradiation. InCrO4-TiO2 showed better activity than TiO2 and TiO2-P25 in the degradation of methyl green (MEG), malachite green (MAG) and methylene blue (MB) because it has maximum efficiency at neutral pH = 7 under UV-light irradiation. Among all these dyes, the photodegradation of MEG was the fastest. The mechanism for the photocatalytic activity of the InCrO4-loaded TiO2 nanomaterial has been discussed. The production of hydroxyl radicals on the surface of UV-irradiated photocatalysts was determined by fluorescence technique using coumarin as a probe molecule. The photodegradation of dyes is well described by pseudo first order kinetics and high quantum yield. Furthermore, the antibacterial activity of the TiO2 and InCrO4-TiO2 materials was investigated against Gram negative Vibrio cholerae and Gram positive Bacillus subtilis bacterial strains.
- 出版日期2015
