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Development and Optimization of a TiO_2-Coated Fiber-Optic Cable Reactor: Photocatalytic Degradation of 4-Chlorophenol

Peill, Nicola J. and Hoffmann, Michael R. (1995) Development and Optimization of a TiO_2-Coated Fiber-Optic Cable Reactor: Photocatalytic Degradation of 4-Chlorophenol. Environmental Science and Technology, 29 (12). pp. 2974-2981. ISSN 0013-936X. https://resolver.caltech.edu/CaltechAUTHORS:20150810-083410781

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Abstract

We have developed, characterized, and utilized a photochemical reactor system that employs an optical fiber cable as a means of light transmission to solid supported TiO_2. Light energy is transmitted to TiO_2 particles, which are chemically anchored onto quartz fiber cores, via radial refraction of light out of the fiber. Operational factors that influence the efficiency of the bundled-array optical fiber reactor are as follows: the uniformity and extent of light propagation down the fiber, the degree of light absorption by the TiO_2 coating of the refracted light, and the ability of the chemical substrates to diffuse into the TiO_2 coating. A TiO_2 coating layer that minimizes the interfacial surface area of the quartz core and TiO_2 particles and operation with incident irradiation angles near 90" enhance light propagation down the fibers. A maximum quantum efficiency of Φ = 0.011 for the oxidation of 4-chlorophenol was achieved. This can be compared to a maximum quantum efficiency of Φ = 0.0065 for 4-chlorophenol oxidation in a TiO_2 slurry reactor operated under similar conditions.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/es00012a013DOIArticle
http://pubs.acs.org/doi/abs/10.1021/es00012a013PublisherArticle
ORCID:
AuthorORCID
Hoffmann, Michael R.0000-0001-6495-1946
Additional Information:© 1995 American Chemical Society. Received for review January 30, 1995. Revised manuscript received June 12, 1995. Accepted July 13. 1995. We are grateful to ARPA and ONR (NAV 5 HFMN N000149Jl901) for financial support and to Janet Kesselman, Scot T. Martin, Dr. Andreas Termin, and Wonyong Choi for scientific support. We would also like to thank 3M and Degussa for their donations of the optical fiber samples and the P25 photocatalyst, respectively.
Funders:
Funding AgencyGrant Number
Advanced Research Projects Agency (ARPA)UNSPECIFIED
Office of Naval Research (ONR)NAV 5 HFMN N000149Jl901
Issue or Number:12
Record Number:CaltechAUTHORS:20150810-083410781
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20150810-083410781
Official Citation:Development and Optimization of a TiO2-Coated Fiber-Optic Cable Reactor: Photocatalytic Degradation of 4-Chlorophenol Nicola J. Peill and Michael R. Hoffmann Environmental Science & Technology 1995 29 (12), 2974-2981 DOI: 10.1021/es00012a013
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:59330
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:10 Aug 2015 16:29
Last Modified:03 Mar 2020 13:01

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