Citation: HUANG Yan, ZHANG Xing-Wang, LEI Le-Cheng. Preparation, Characterization and Catalytic Activity for ortho- Dichlorobenzene Ozonation of Fe-, Mn-Doped Xerogels[J]. Acta Physico-Chimica Sinica, ;2010, 26(09): 2443-2448. doi: 10.3866/PKU.WHXB20100840 shu

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

1.
Institute of Industrial Ecology and Environment, Department of Chemical and Biological Engineering,Zhejiang University, Hangzhou 310027, P. R. China

Received Date: 25 February 2010
Available Online: 2 July 2010
Fund Project: 国家自然科学基金(20836008, U0633003) (20836008, U0633003) 浙江省科技计划项目(2007C13061) (2007C13061)国家高技术研究发展计划(2007AA06Z339, 2008BAC32B06,2007AA06A409)资助 (2007AA06Z339, 2008BAC32B06,2007AA06A409)

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.
- Sol-gel method,
- Xerogel,
- Characterization,
- Catalytic ozonation,
- ortho-Dichlorobenzene
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