Citation: Hui-Long Wang, Hui-Ping Qi, Xiao-Na Wei, Xiao-Yu Liu, Wen-Feng Jiang. Photocatalytic activity of TiO₂ supported SiO₂-Al₂O₃ aerogels prepared from industrial fly ash[J]. Chinese Journal of Catalysis, ;2016, 37(11): 2025-2033. doi: 10.1016/S1872-2067(16)62546-9 shu

Photocatalytic activity of TiO₂ supported SiO₂-Al₂O₃ aerogels prepared from industrial fly ash

a Department of Chemistry, Dalian University of Technology, Dalian 116024, China;
b Experimental Center of Chemistry, Dalian University of Technology, Dalian 116024, China

Received Date: 12 July 2016
Revised Date: 3 September 2016

Fund Project: This work was supported by the National Natural Science Foundation of China (21377018), the Natural Science Foundation of Liaoning Province of China (2013020116) and the Fundamental Research Funds for the Central Universities (DUT15ZD240).

A ternary composite of TiO₂ and a SiO₂-Al₂O₃ aerogel with good photocatalytic activity was prepared by a simple sol-gel method with TiO₂ nanoparticles and SiO₂-Al₂O₃ aerogels derived from industrial fly ash. The structural features of the TiO₂/SiO₂-Al₂O₃ aerogel composite were investigated by X-ray powder diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy, gas adsorption measurements and diffuse reflectance UV-visible spectroscopy. The optimal conditions for photocatalytic degradation of 2-sec-butyl-4,6-dinitrophenol (DNBP), included an initial DNBP concentration of 0.167 mmol/L at pH=4.86 with a catalyst concentration of 6 g/L, under visible light irradiation for 5 h. A plausible mechanism is proposed for the photocatalytic degradation of DNBP. Our composite showed higher photocatalytic activity for DNBP degradation than that of pure TiO₂. This indicates that this material can serve as an efficient photocatalyst for degradation of haz-ardous organic pollutants in wastewater.
- Titania,
- SiO₂-Al₂O₃ aerogel,
- Composite photocatalyst,
- Industrial fly ash,
- 2-sec-butyl-4,6-dinitrophenol,
- Wastewater treatment
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Photocatalytic activity of TiO₂ supported SiO₂-Al₂O₃ aerogels prepared from industrial fly ash