Abstract
ZnO photocatalysts with various morphologies (nanorod-like, nanosheet-like, and a mixture of rods and particles) are successfully prepared via simple solid states reactions at room temperature and 300 °C. The samples are characterized and used for photodecolorization of Congo red. It is found that there is a close relationship between photodecolorization, morphology, and size. The optical band gap value of nanorodlike ZnO is calculated to be about 4.0 eV. This value exhibits a nearly 0.7-0.9 eV blue shift from that of nanosheet-like ZnO and a mixture of ZnO rods and particles, which is related to a decrease in the size of particles and the achievement of the quantum confinement limit of nanoparticles. Also, nanorod-like ZnO shows higher decolorization in visible light as compared with other photocatalysts. It may be attributed to the special morphology (nanorod-like) with a smaller crystallite size. Nanorod-like ZnO could be considered as a promising photocatalyst for dye treatment.
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Original Russian Text © 2018 A. Anaraki Firooz, R. Abdullah Mirzaie, F. Kamrani.
The text was submitted by the authors in English. Zhurnal Strukturnoi Khimii, Vol. 59, No. 3, pp. 761–765, March-April, 2018.
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Firooz, A.A., Mirzaie, R.A. & Kamrani, F. Effect of Morphological ZnO Nanostructures on the Optical and Decolorization Properties. J Struct Chem 59, 739–743 (2018). https://doi.org/10.1134/S002247661803037X
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DOI: https://doi.org/10.1134/S002247661803037X