Visible-Light Photocatalytic Performance of N/RH/TiO₂ Complex Materials

Abstract:

The TiO₂ complex samples were produced through sol-gel method, using Ti (OC₄H₉)₄, rice husk (RH) and methenamine as the reactants. Some property analyses were conducted, including X-ray diffraction (XRD), Brunauer-Emmet-Teller (BET), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), and photocatalytic experiments in the condition of visible-light. The results showed that the size of crystal was limited with the addition of RH in the complex of N/RH/TiO₂ samples. The particles of TiO₂ were dispersed on the surface of rice husk ash, the skeleton of RH after burning. It can inhibit the phenomenon of agglomerate. The ability of both adsorption and photocatalytie activity of complex samples increased as the surface area increased. Doping N into RH/TiO₂ samples can decrease the forming time, inhibit the transformation of crystal from anatase to rutile to some extent, improve the bond of Ti-O-Si to form and make the absorption spectrum move to the red light part. The complex samples exhibited a certain photocatalytic activity under the visible light region. The reaction rate of visible light photodegradation process arrived 0.0143 min^-1, meeting with the first-order reaction kinetics.

• Periodical: Materials Science Forum (Volume 814)
• Pages: 590-595
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.814.590
• Online since: March 2015
• Authors: Qing Ge Feng, Si Y. Qin, Ting Wang, Xiao F. Weng, Bao L. Song, Dong B. Wang
• Keywords: Complex, Nitrogen Doping, Pre-Support, Rice Husk, Titanium Dioxide, Visible-Light

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