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Surface Coating TiO2 on Sepiolite Fibers and Application in Paper-making Waste Water Treatment

Published online by Cambridge University Press:  01 February 2011

Yajie Guo ,
Yuran Wang ,
Guangjian Wang ,
Zhengwang Liu ,
Zhengxing Yang  and
Fei Wang
Yajie Guo
Affiliation:
School of Chemistry and Materials Science, Huaibei Normal Univesity, Huaibei, Anhui, 235000, P.R. China
Yuran Wang
Affiliation:
School of Chemical Engineering, Shanghai Jiaotong University, Shanghai, 200030, P.R. China
Guangjian Wang*
Affiliation:
School of Chemistry and Materials Science, Huaibei Normal Univesity, Huaibei, Anhui, 235000, P.R. China
Zhengwang Liu
Affiliation:
School of Chemistry and Materials Science, Huaibei Normal Univesity, Huaibei, Anhui, 235000, P.R. China
Zhengxing Yang
Affiliation:
School of Chemistry and Materials Science, Huaibei Normal Univesity, Huaibei, Anhui, 235000, P.R. China
Fei Wang
Affiliation:
School of Chemical Engineering, Shanghai Jiaotong University, Shanghai, 200030, P.R. China
*
*Corresponding author, Email: [email protected]
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Abstract

The purpose of this paper was to describe a method of preparing Fe-TiO2 supported on sepiolite fibers with sol-gel method and to discuss the feasibility of photocatalytic degradation of paper-making waste water with chemical oxygen depletion (CODcr) (Potassium dichromate method) as evaluation criterion of catalytic activity. As-fabricated catalysts consisted of TiO2 particles impregnated with iron and dispersed on the sepiolite fibers (S.F.s). The novel Fe-TiO2-sepiolite was characterized by specific surface area and pore size distribution measurements, scanning electron microscope (SEM), high resolution transmission electron microscope (HRTEM), X-ray diffraction (XRD) and Fourier transform Infrared spectrometer (FT-IR) etc. The effects of parameters such as the amount of Ti/sepiolite fibers, initial pH, H2O2, Fe-doped, concentration of waste water, etc. were studied in detail. The results indicated that the presence of sepiolite in the support preparation and its role as a matrix over which TiO2 particles were dispersed seem to play an important effect in the migration process of oxygen species through the support vacancies. On the basis of these properties, the most promising carriers to be used in a waste water treatment process were selected.

Keywords

sepiolite fiberssurface coatingphotocatalystwater treatmentCODcr
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1279: New Catalytic Materials , 2010 , 28
Copyright
Copyright © Materials Research Society 2010

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