Sol-Gel Preparation and Characterization of SiO₂/TiO₂ Composite Mesoporous Materials with Bacterial Cellulose for Photocatalysis of Methyl Orange

Abstract:

SiO2/TiO2 composite mesoporous materials prepared by sol-gel method with bacterial cellulose（BC）as a surface esterification agent and porous template was as photocatalyst in the degradation of methyl orange（MO）in water under UV- irradiation. The results show that the best heat treatment condition is at 600°Cfor 3 h and the optimum content of SiO2 is 30% (30 denotes the weight percent of SiO2). The photoactivity of 30SiO2/TiO2 catalyst prepared with BC was much better than that of reference catalyst prepared with no BC. An addition of BC not only raises the adsorbability of the photocatalyst, but also effectively inhibits anatase-rutile transformation and effectively induce amorphous-anatase transformation of TiO2. The BET surface area of 30%SiO2/TiO2 composite mesoporous materials was the largest. The resulting mesoporous materials showed a high photocatalytic activity for the photodegradation of methyl orange in the UV-irradiation.

• Periodical: Advanced Materials Research (Volumes 535-537)
• Pages: 2181-2185
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.535-537.2181
• Online since: June 2012
• Authors: Xiao Li Xiong*, Chong Hua Pei, Shu Wei Li
• Keywords: Mesoporous Material, Photocatalysis, SiO₂-TiO₂, Sol-Gel Preparation

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