YIN Bo, LONG Donghui, XU Wei, XU Sheng, QIAO Wenming*, LING Licheng
(State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China)
Abstract: Platelet nanofibers (PCNF) pretreated by acidity oxidation treatment was employed as supports to prepare TiO2/PCNF nanocomposites by a hydrothermal process with titanium (IV) isopropoxide as the precursor, its photocatalysis activity and recycle property were investigated. The TiO2 content of photocatalysts was turned by changing the precursor composition. The pure PCNF and the composites were characterized by Nitrogen adsorption, XRD, TG-DSC, SEM and Energy disperse spectroscopy, and TEM. The results showed that anatase TiO2 nanoparticles could be highly dispersed on the surface of fibers, leading to the formation of high performance photocatalysts for degradation of Methyl orange (MO) under UV irradiation. The MC promoted the dispersion of TiO2 in composite system and induced synergistic effects of adsorption and phtocatalytic degradation on the removal of MO. The highest MO remove rate could reach as high as 80.1 % in 120 min for different TiO2 content samples and 79.2 % for different temperature under UV irradiation. After three cycle reaction, the MO remove rate could still reach 80 %.
Key words: Platelet carbon nonafiber; TiO2; composites; photocatalytic degradation; kinetics
E-mail: qiaowm@ecust.edu.cn
Journal of Molecular Catalysis, Vol. 26, Issue 5, 2012, 442-448
