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Photocatalytic Degradation of Phenol over MWCNTs-TiO2 Composite Catalysts with Different Diameters
Chen Li,Long-shan Zhang
Author NameAffiliationE-mail
Chen Li Department of Chemical Physics, University of Science and Technology of China, Hefei 230026,China；Department of Chemistry and Chemical Engineering, Huainan Normal University, Huainan 232001,China  
Long-shan Zhang Department of Chemical Physics, University of Science and Technology of China, Hefei 230026,China wangwd@ustc.edu.cn 
Abstract:
Titania-based composite catalysts were prepared through a sol-gel route employing multiwalled carbon nanotubes with different diameters. The materials were characterized using thermogravimetric analysis, nitrogen adsorption-desorption isotherm, powder X-ray diffraction, scanning electron microscopy, and diffuse reflectance UV-Vis absorption spectra. The application of the catalysts to photocatalytic degradation of phenol was tested under UV-Vis irradiation. A synergetic effect on phenol removal was observed in case of composite catalysts, which was evaluated in terms of apparent rate constant, total organic carbon removal and photonic efficiency.
Key words:  Photocatalytic degradation, Phenol, Titanium dioxide, Multi-walled carbon nanotube, Composite catalyst
FundProject:
Photocatalytic Degradation of Phenol over MWCNTs-TiO2 Composite Catalysts with Different Diameters
李晨,汪文栋*
摘要:
采用溶胶-凝胶法制备了不同管径的多壁碳纳米管-二氧化钛(MWCNTs-TiO2)催化剂．应用热重分析、N2等温吸附和BET比表面、X射线衍射、扫描电镜以及漫反射紫外可见吸收光谱等对样品进行了表征．选择光催化降解苯酚反应对光催化剂性能进行了测试，结果表明，MWCNTs-TiO2催化剂在苯酚降解反应中表现出明显的协同效应，并分别采用表观反应速率常数、总有机碳消除和光子效率对此协同效应进行了评价
关键词:  光催化降解，苯酚，二氧化钛，多壁碳纳米管，复合催化剂
DOI：10.1088/1674-0068/22/04/423-428
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