期刊文献+

Photocatalytic properties of TiO_2 bonded active carbon composites prepared by SOL-GEL

Photocatalytic properties of TiO_2 bonded active carbon composites prepared by SOL-GEL
下载PDF
导出
摘要 Photocatalyst of TiO2 bonded active carbon (TiO2/AC), was prepared via sol-gel method from a mixture of TiO2 sol with active carbon. Post heat treatment was performed at 250 ℃ for 2 h in air and then kept at 400 ℃ to 600 ℃ under a flow of nitrogen for 2 h. The TiO2/AC composites obtained were characterized by SEM, XRD, UV-vis and BET. The photocatalytic activities of the TiO2/AC composites were studied in comparison with TiO2, AC, P-25 and a mixture of TiO2 and AC, respectively. The Ramnant rate of Rhodamine B absorbed by the active carbon is found to be almost 70% and the remnant rates of the Rhodamine B decolorized by TiO2 and the mixture of TiO2 and the active carbon are 30% and 25%, respectively. However, nearly complete removal of Rhodamine B is observed for a TiO2/AC composite after 200 min under UV irradiation, which will take the P-25 commercial product 5 h. Therefore, the TiO2/AC composite is much more effective in decolorization of aqueous Rhodamine B. In addition, the composite can be easily separated from solutions. Photocatalyst of TiO_2 bonded active carbon (TiO_2/AC), was prepared via sol-gel method from a mixture of TiO_2 sol with active carbon. Post heat treatment was performed at 250 ℃ for 2 h in air and then kept at 400 ℃ to 600 ℃ under a flow of nitrogen for 2 h. The TiO_2/AC composites obtained were characterized by SEM, XRD, UV-vis and BET. The photocatalytic activities of the TiO_2/AC composites were studied in comparison with TiO_2, AC, P-25 and a mixture of TiO_2 and AC, respectively. The Ramnant rate of Rhodamine B absorbed by the active carbon is found to be almost 70% and the remnant rates of the Rhodamine B decolorized by TiO_2 and the mixture of TiO_2 and the active carbon are 30% and 25%, respectively. However, nearly complete removal of Rhodamine B is observed for a TiO_2/AC composite after 200 min under UV irradiation, which will take the P-25 commercial product 5 h. Therefore, the TiO_2/AC composite is much more effective in decolorization of aqueous Rhodamine B. In addition, the composite can be easily separated from solutions.
出处 《中国有色金属学会会刊:英文版》 CSCD 2004年第6期1232-1237,共6页 Transactions of Nonferrous Metals Society of China
基金 ProjectsupportedbytheNationalDefenceofAcademyofMilitaryMedicalScience
关键词 光接触反应 二氧化态 复合物 溶胶-凝胶体 活性碳 TiO_2-bonded composite sol-gel photoactivity active carbon
  • 相关文献

参考文献1

二级参考文献1

共引文献149

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部