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HuangD.the (final comments 2).pdf (1.7 MB)
ETD Abstract Container
Abstract Header
In Situ Infrared Studies of Photooxidation of Ethanol and Bacteria on TiO2-Based Catalysts
Author Info
Huang, Dan
Permalink:
http://rave.ohiolink.edu/etdc/view?acc_num=akron1398093214
Abstract Details
Year and Degree
2014, Master of Science, University of Akron, Polymer Science.
Abstract
TiO
2
is modified to Fe-doped TiO
2
and ALD Fe-doped TiO
2
to test two hypotheses: i) Fe-doped TiO
2
can enhance photocatalytic activity under visible light due to the adsorption of visible light and ii) external layer of TiO
2
on Fe-doped TiO
2
can enhance photocatalytic activity of catalyst by providing more active sites. Photocatalytic activity of catalysts was characterized by the rate of ethanol photooxidation. The results showed that Fe-doped TiO
2
and ALD Fe-doped TiO
2
have adsorption on visible light range, but do not have visible light photoactivity. This could be explained by that Fe-doped TiO
2
and ALD Fe-doped TiO
2
do not have enough rutile crystal structure. In addition, external layer on ALD Fe-doped TiO
2
does not enhance photocatalytic activity. It can be explained by remaining organic compound on the surface of ALD Fe-doped TiO
2
block some active sites. Sol-gel TiO
2
and anatase are used to test two hypotheses: i) morphology of catalyst has effect on bacteria degradation and ii) water can facilitate the bacteria degradation on sol-gel TiO
2
. The results showed bacteria degradation on sol-gel TiO
2
is faster than that on anatase, which validated the first hypothesis. It can be explained by that sol-gel TiO
2
(rhombus-shaped TiO
2
with small particle size) has more effective contact surface with bacteria than anatase (sphere-shaped TiO
2
with big particle size). In addition, the presence of water can increase the degradation rate of bacteria, which validated the second hypothesis. Holes produced from UV illumination can react with H2O to produce •OH, and more •OH can facilitate the degradation of bacteria. In-situ diffuse reflectance infrared fourier transform (DRIFT) infrared spectroscopy is the main characterization method in this study to monitor the photooxidation of ethanol and degradation of bacteria. Peak height change was used as quantitative indicator of photooxidation and degradation.
Committee
Steven Chuang, Dr. (Advisor)
Xiong Gong, Dr. (Committee Member)
Pages
83 p.
Subject Headings
Chemical Engineering
;
Chemistry
;
Polymer Chemistry
;
Polymers
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Citations
Huang, D. (2014).
In Situ Infrared Studies of Photooxidation of Ethanol and Bacteria on TiO2-Based Catalysts
[Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1398093214
APA Style (7th edition)
Huang, Dan.
In Situ Infrared Studies of Photooxidation of Ethanol and Bacteria on TiO2-Based Catalysts .
2014. University of Akron, Master's thesis.
OhioLINK Electronic Theses and Dissertations Center
, http://rave.ohiolink.edu/etdc/view?acc_num=akron1398093214.
MLA Style (8th edition)
Huang, Dan. "In Situ Infrared Studies of Photooxidation of Ethanol and Bacteria on TiO2-Based Catalysts ." Master's thesis, University of Akron, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=akron1398093214
Chicago Manual of Style (17th edition)
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Document number:
akron1398093214
Download Count:
610
Copyright Info
© 2014, all rights reserved.
This open access ETD is published by University of Akron and OhioLINK.
Release 3.2.12