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Photo-Degradation of Acid Red 18 by Using TiO2/SO42- Nanoparticles under UV Light
Abstract:
Photocatalyst TiO2/SO42- nanoparticles were synthesized by sol-gel method via hydrolysis of pure titanium isopropoxide in n-propanol and acetylacetone solution. The hydrolysis rate and condensation rate of titanium isopropoxide were controlled by concentrated sulfuric acid. Its catalytic activities on the photo-degradation of acid red 18 which is acid azo dyes were studied experimentally and theoretically. The catalysts were characterized by XRD (X-ray diffraction), IR (infrared radiation), BET surface area and SEM (scanning electron microscope). The effects of various catalytic degradation factors of nanocrystalline TiO2/SO42- were discussed in the present paper, which included solution pH, initial concentration of acid red 18, UV irradiation time and the reaction temperature. The results showed that the photo-catalytic activity of this material was obvious significantly when pH is 7.0; degradation temperature is 25 °C and irradiation time is 90 minutes for different concentration acid red 18 solutions.
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52-57
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July 2012
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© 2012 Trans Tech Publications Ltd. All Rights Reserved
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