Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (09): 2443-2448.doi: 10.3866/PKU.WHXB20100840

• CATALYSIS AND SURFACE STRUCTURE • Previous Articles     Next Articles

Preparation, Characterization and Catalytic Activity for ortho- Dichlorobenzene Ozonation of Fe-, Mn-Doped Xerogels

HUANG Yan, ZHANG Xing-Wang, LEI Le-Cheng   

  1. Institute of Industrial Ecology and Environment, Department of Chemical and Biological Engineering,Zhejiang University, Hangzhou 310027, P. R. China
  • Received:2010-02-25 Revised:2010-05-05 Published:2010-09-02
  • Contact: LEI Le-Cheng E-mail:lclei@zju.edu.cn;lablei@zju.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20836008, U0633003), Science and Technology Department of Zhejiang Province, China (2007C13061), and National High Technology Research and Development Programof China (2007AA06Z339, 2008BAC32B06, 2007AA06A409).

Abstract:

Metal-doped xerogels were synthesized by the sol-gel method and their catalytic performance was evaluated for the catalytic ozonation of simulated micro-polluted water containing ortho-dichlorobenzene (o-DCB). The obtained samples were characterized by X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), X-ray diffraction (XRD), scanning electron microscopy (SEM), mercury porosimetry and nitrogen adsorption. Results show that Fe3+ oxides and Mn3+ oxides are present in the Fe-doped xerogel (XFe) and the Mn-doped xerogel (XMn), respectively. No obvious diffraction peaks corresponding to a metallic phase were present in the XRD patterns of the xerogels. Also, the metallic particles were found to be small; therefore, the metallic particles were well distributed over the xerogel supports. Catalytic ozonation experiments indicated that the removal rate of o-DCB was 44% with single ozonation, and this increased to 58% and 72% with catalytic ozonation using XFe and XMn, respectively, which suggests that metal-doped xerogels are promising catalysts for the ozonation process. We also investigated metal leaching from the metal-doped xerogel to the water solution to test the stability of the catalysts, and about 2%and 8%metal leaching for XFe and XMn was obtained within 5 h.

Key words: Sol-gel method, Xerogel, Characterization, Catalytic ozonation, ortho-Dichlorobenzene

MSC2000: 

  • O643