화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.18, No.1, 574-580, January, 2012
DOI10.1016/j.jiec.2011.11.060  Export Citation
The simultaneous photocatalytic degradation of phenol and reduction of Cr(VI) by TiO2/CNTs
Langhuan Huang†, Qizhong Chan, Xiaojing Wu, Houjin Wang, and Yingliang Liu
  • Department of Chemistry, Jinan University, Guangzhou 510632, PR China
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The main objective of this paper is to verify the potential of TiO2/CNTs in the simultaneous photocatalytic degradation of phenol and reduction of Cr(VI). From the present results it can be concluded that there is a synergistic effect between the photocatalytic degradation of phenol and reduction of Cr(VI). Under all tested conditions, the degradation of phenol and reduction of Cr(VI) were examined to follow pseudofirst-order kinetic. The rate constant of 40 mg/L of Cr(VI) was evaluated as 4.34 × 10^(-3) min^(-1) in the absence of phenol, and was increased up to 9.27 × 10^(-3) min^(-1) by adding 10 mg/L of phenol, and to 10.73 × 10^(-3) min^(-1) by adding 15 mg/L of phenol. The presence of Cr(VI) also accelerated the degradation process of phenol, with a factor of 1.84-3 times. Such a great synergistic effect was likely to be attributed to two kinds of effects from CNTs: adsorption effect and electron trap effect. The synergistic effect induced by CNTs was also confirmed by the detection of degradation intermediates of phenol.
Keywords:Titanium dioxide;Carbon nanotubes;Phenol;Cr(VI);Simultaneous photocatalysis
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