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Temperature effect on the photocatalytic degradation of methyl orange under UV-vis light irradiation

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Abstract

PTA sol was prepared using titanium tetrachloride (TiCl4), hydrogen peroxide (H2O2) and ammonia (NH3·H2O), and then stable anatase-TiO2 hydrosol was synthesized by refluxing the PTA sol at 100 °C. It was found that TiO2 hydrosol can efficiently photo-degrade methyl orange (MO) under UV-vis light irradiation. Photocatalytic reactions at the temperature of 38 to 100 °C all followed pseudo-first-order rate law, and the temperature had a great effect on the reaction rate. The rate constants increased by about 6 times from 3.52×10−4 to 2.17×10−3 min−1 when the temperature was adjusted from 38 to 100 °C. Consequently, this photocatalytic course can be accelerated by using the infrared light of solar energy to increase the temperature of the photo-catalytic reaction, it should be a potential way to make full use of solar light in photocatalysis in practice.

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Correspondence to Xiujian Zhao  (赵修建).

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Funded by the National Natural Sience Foundation of China (No.50702041), the Wuhan Young Scientists Chenguang Plan (No.20091j0080), the Nippon Sheet Glass Foundation for Materials Science and Engineering, and the National Basic Research Program of China (2009CB939704)

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Hu, Q., Liu, B., Zhang, z. et al. Temperature effect on the photocatalytic degradation of methyl orange under UV-vis light irradiation. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 25, 210–213 (2010). https://doi.org/10.1007/s11595-010-2210-5

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  • DOI: https://doi.org/10.1007/s11595-010-2210-5

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