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Kinetics of the Photocatalytic Decolorization of an Azo Reactive Dye in Aqueous ZnO Suspensions
Abstract
The photocatalytic decolorization of Remazol Red RR, a commercial azo reactive textile dye, in ZnO suspension, has been investigated in a quartz batch reactor with the use of artificial light source (UV−C). The reaction kinetics are modeled by pseudo-first-order rate law. Regression analysis related pseudo-first-order rate constant, k, to the catalyst loading, empirically as k ∝ [ZnO] 0.6 . The decolorization rate increases with increasing pH, attaining maximum value at pH 10. The rate constant is inversely related to the initial dye concentration, empirically according to the relation k ∝ [C 0 ] -1.5 . Finally, the rate constant is found proportional to the square root of the light intensity as k ∝ [ I ] 0.5 . These empirical models are therefore combined as k ∝ [ZnO] 0.6 [C 0 ] -1.5 [ I ] 0.5
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Cites
Photocatalytic degradation for environmental applications—A review
Bhatkhande, D. S., Pangarkar, V. G., & Beenackers, A. A. C. M. (2002) · Journal of Chemical Technology & Biotechnology · doi:10.1002/jctb.532 · Cited by 1,365
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Photoelectrocatalytic materials for environmental applications
Zhang, H., Chen, G., & Bahnemann, D. W. (2009) · Journal of Materials Chemistry · doi:10.1039/b821991e · Cited by 960
A survey of photocatalytic materials for environmental remediation
Di Paola, A., García-López, E., Marcì, G., & Palmisano, L. (2012) · Journal of Hazardous Materials · doi:10.1016/j.jhazmat.2011.11.050 · Cited by 931
Ag/ZnO Heterostructure Nanocrystals: Synthesis, Characterization, and Photocatalysis
Zheng, Y., Zheng, L., Zhan, Y., Lin, X., Zheng, Q., & Wei, K. (2007) · Inorganic Chemistry · doi:10.1021/ic700688f · Cited by 913
Li, B., & Wang, Y. (2010) · The Journal of Physical Chemistry C · doi:10.1021/jp909478q · Cited by 405
Wang, X. H., Li, J.-G., Kamiyama, H., Moriyoshi, Y., & Ishigaki, T. (2006) · The Journal of Physical Chemistry B · doi:10.1021/jp060082z · Cited by 349
Metadata
- Authors
- Yatmaz, H. C., Akyol, A., & Bayramoglu, M.
- Venue
- Industrial & Engineering Chemistry Research
- Publisher
- American Chemical Society (ACS)
- Published
- 2004-08-11
- Volume
- 43
- Issue
- 19
- Pages
- 6035-6039
- ISSN
- 0888-5885 (ISSN-L)
- 1520-5045
- OpenAlex
- W2000794390
- Cited by
- 167
- References
- 1
- FWCI
- 2.87
- Type
- journal article
- Language
- en
- Open access
- closed
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- Yatmaz, H. C., Akyol, A., & Bayramoglu, M. (2004). Kinetics of the Photocatalytic Decolorization of an Azo Reactive Dye in Aqueous ZnO Suspensions. Industrial & Engineering Chemistry Research. https://doi.org/10.1021/ie049921z
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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