Fig. 1.
X-ray diffraction patterns of zinc oxide thin films deposited for various substrate temperatures
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S.S. Shinde, C.H. Bhosale, K.Y. Rajpure. Solar light assisted photocatalysis of water using a zinc oxide semiconductor[J]. Journal of Semiconductors, 2013, 34(4): 043002. doi: 10.1088/1674-4926/34/4/043002
S.S. Shinde, C.H. Bhosale, K.Y. Rajpure. Solar light assisted photocatalysis of water using a zinc oxide semiconductor[J]. J. Semicond., 2013, 34(4): 043002. doi: 10.1088/1674-4926/34/4/043002.
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Solar light assisted photocatalysis of water using a zinc oxide semiconductor
doi: 10.1088/1674-4926/34/4/043002
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Abstract
The photocatalytic decomposition of an eco-persistent AO7 dye with sunlight in an oxygenated aqueous suspension has been studied under a nano-crystalline hexagonal ZnO photocatalyst. The effect of substrate temperature on the structural, morphological and photoactive properties has been investigated. The degradation of the AO7 dye is achieved using a photoelectrochemical reactor module equipped with ZnO synthesized electrodes. Kinetic parameters have been investigated in terms of a first order rate equation. The rate constant for this heterogeneous photocatalysis was evaluated as a function of the initial concentration of original species. A substantial reduction in AO7 dye is achieved as analyzed from COD and TOC studies. The mechanism for the degradation could be explained on the basis of the Langmuir-Hinshelwood mechanism.-
Keywords:
- zinc oxide,
- chemical kinetics,
- photoelectrocatalysis,
- organic species,
- sunlight
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References
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