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Photocatalytic Degradation of Phenol over MWCNTs-TiO2 Composite Catalysts with Different Diameters
Chen Li1,2, Long-shan Zhang1
1.Department of Chemical Physics, University of Science and Technology of China, Hefei 230026,China;2.Department of Chemistry and Chemical Engineering, Huainan Normal University, Huainan 232001,China
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1,2, 汪文栋*1
1.中国科学技术大学化学物理系,合肥230026;2.淮南师范学院化学与化工系,淮南232001
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
分类号: