DOI: 10.1002/jctb.451. Oxidative degradation of 4‐nitrophenol in UV‐illuminated titania suspension

Oxidative degradation of 4‐nitrophenol in UV‐illuminated titania suspension

10.1002/jctb.451

Crossref journal-article

Wiley

Journal of Chemical Technology & Biotechnology (311)

Abstract

AbstractAn internally‐irradiated annular photoreactor has been used to investigate the oxidative degradation of aqueous 4‐nitrophenol with titania as the photocatalyst. Reaction runs were performed over a 3‐h period and in practically all cases, complete degradation was possible within about 2 h. The kinetics was determined as a function of nitrophenol concentration, oxygen partial pressure, catalyst loading, pH, temperature and light intensity. The reaction was characterised by a relatively low activation energy of 7.83 kJ mol−1 although transport intrusions were negligible. Rate decreased almost exponentially with pH while a quadratic (maximum) behaviour with respect to both oxygen pressure and nitrophenol concentration is symptomatic of self‐inhibition possibly due to the formation of intermediates which competitively adsorb on similar sites to the reactants. Increased catalyst dosage also improved the reaction rate although the possible effects of light scattering and solution opacity caused a drop at loadings higher than about 1.20 g dm−3. Rate, however, has a linear dependency on light intensity, suggesting that hole–electron recombination processes were negligible at the conditions investigated.© 2001 Society of Chemical Industry

Bibliography

Lea, J., & Adesina, A. A. (2001). Oxidative degradation of 4ânitrophenol in UVâilluminated titania suspension. Journal of Chemical Technology & Biotechnology, 76(8), 803â810. Portico.

Authors 2

Jimmy Lea (first)
Adesoji A Adesina (additional)

References 20 Referenced 53

10.1021/es00021a001
10.1016/0166-6622(92)80296-E
10.1016/S0920-5861(99)00189-3
10.1163/156856700X00255
{'key': 'e_1_2_7_6_2', 'volume-title': 'Heterogeneous Photochemical Electron Transfer', 'author': 'Gratzel M', 'year': '1989'} / Heterogeneous Photochemical Electron Transfer by Gratzel M (1989)
10.1007/BF00811803
10.1016/S1010-6030(97)00124-X
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10.1016/1010-6030(95)04297-0
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10.1021/ja00339a007
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{'key': 'e_1_2_7_18_2', 'volume-title': 'Proceedings Regional Symposium on Chemical Engineering 2000', 'author': 'Han L‐Q', 'year': '2000'} / Proceedings Regional Symposium on Chemical Engineering 2000 by Han L‐Q (2000)
10.1246/bcsj.58.2023
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10.1016/1010-6030(93)80022-2

Dates

Type	When
Created	22 years, 11 months ago (Sept. 10, 2002, 9:16 p.m.)
Deposited	1 year, 10 months ago (Oct. 8, 2023, 3:01 p.m.)
Indexed	1 year ago (Aug. 23, 2024, 2:40 a.m.)
Issued	24 years, 2 months ago (June 27, 2001)
Published	24 years, 2 months ago (June 27, 2001)
Published Online	24 years, 2 months ago (June 27, 2001)
Published Print	24 years, 1 month ago (Aug. 1, 2001)

Funders 0

None

BibTeX

@article{Lea_2001, title={Oxidative degradation of 4‐nitrophenol in UV‐illuminated titania suspension}, volume={76}, ISSN={1097-4660}, url={http://dx.doi.org/10.1002/jctb.451}, DOI={10.1002/jctb.451}, number={8}, journal={Journal of Chemical Technology & Biotechnology}, publisher={Wiley}, author={Lea, Jimmy and Adesina, Adesoji A}, year={2001}, month=jun, pages={803–810} }

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