A comparative study of TiO2 -C hybrid aerogels from TiCl4 or Ti(OBu)(4) for photocatalytic methylene blue degradation

作者：Shao Xia; Lu Wen-cong^*; Zhang Rui; Pan Feng

来源：New Carbon Materials, 2013, 28(5): 378-384.

• Sol-gel
• Organic/inorganic hybrid
• Methylene blue
• Photocatalytic degradation

TiO2-C hybrid aerogels were obtained by a one-pot sol-gel method, followed by supercritical drying and pyrolysis, using resorcinol (R) and f-urfural( F) as carbon sources, and TiCl(4)or Ti ( OBu)(4) as the TiO, precursor. The hybrid aerogels were characterized by XRD, BR-TEM and N, adsorption. The photocatalytic activity of the samples was evaluated based on the conversion of methylene blue (MB) under UV light. Results showed that the type of precursor and the mass ratio of TiO, to carbon influenced the surface area and MB conversion. The TiO2-C hybrid aerogels using TiCl4 as TiO, precursor had a higher surface area and a better photocatalytic activity than those using Ti(OBu)(4) as precursor under otherwise identical conditions. The best sample was obtained when TiCl4 was used and the TiO, content was 40%. This had the largest average pore size of 7.8 am, the highest mesopore volume of 0.40 cm(3)/g and the highest MB conversion of 99.6% under an ultraviolet exposure for 180 min.

• 出版日期2013-10
• 单位上海应用技术大学; 上海大学