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Increasing the Photocatalytic Activity by Mechano-chemically Milling on Zn- Doped TiO2

Published online by Cambridge University Press:  31 January 2011

Chennan Li ,
Sesha Srinivasan ,
Paula Algarin ,
Nikolai Kislov ,
Ayala Phani ,
Lee Stefanakos  and
Yogi Goswami
Chennan Li
Affiliation:
chennanli@gmail.com, University of South Florida, Clean Energy Research Center, Tampa, Florida, United States
Sesha Srinivasan
Affiliation:
sesha.srinivasan@gmail.com, Tuskegee University, Physics Department, Tuskegee, Alabama, United States
Paula Algarin
Affiliation:
pcalgarin@gmail.com, University of South Florida, Clean Energy Research Center, Tampa, Florida, United States
Nikolai Kislov
Affiliation:
nanocvd@verizon.net, NanoCVD Inc, Tampa, Florida, United States
Ayala Phani
Affiliation:
arp@nano-ram.org, NanoRAM Technologies, Bangalore, Karnataka, India
Lee Stefanakos
Affiliation:
stefanak@eng.usf.edu, University of South Florida, Clean Energy Research Center, Tampa, Florida, United States
Yogi Goswami
Affiliation:
goswami@eng.usf.edu, University of South Florida, Clean Energy Research Center, Tampa, Florida, United States
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Abstract

This paper pursed one new cost effective strategy to improve the photocatalytic activity of the sol-gel developed Zn doped TiO2 by mechano-chemically milling in high energy planetary mill. The results showed that the photocatlytic activity was improved two times due to the increase of the surface area and the decrease in average crystallite size at the same time after using the high energy ball milling. Kubelka-Munk spectra of pristine and ball milled samples revealed a blue shift from 3.2 eV to 3.35 eV, which may be because of the presence of quantum size effects. SEM microstructural investigations revealed variations in the surface morphology with different Zn doping concentrations in the TiO2-Xwt.% Zn nanoparticulates. EDS spectra of these samples confirmed the stoichiometric concentration of Zn. Other characterization including X-ray diffraction (XRD), BET surface and the photocatalytic decomposition were also studied and the results were in agreement with each other.

Keywords

catalyticmechanical alloyingmicrostructure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1217: Symposium Y – Catalytic Materials for Energy, Green Processes and Nanotechnology , 2009 , 1217-Y03-34
Copyright
Copyright © Materials Research Society 2010

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