Hydrothermal coating of ZnO onto calcium alumino silicate beads and their application in photodegradation of amaranth dye

Shivaraju, H. P. and Byrappa, K. and Shayan, M. B. and Rungnapa, T. and Pakamard, S. and Kumar, V. and Ananda, S. (2010) Hydrothermal coating of ZnO onto calcium alumino silicate beads and their application in photodegradation of amaranth dye. Materials Research Innovations, 14 (1). pp. 73-79. ISSN 1433-075X

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Official URL: https://doi.org/10.1179/143307510X12599329343367

Abstract

Hydrothermal coating of ZnO nanoparticles onto the surface of calcium alumino silicate beads was carried out under hydrothermal conditions (T, 220 degrees C; P, 300 psi; duration, 12 h). The reagent grade ZnO and calcium alumino silicate beads (0.5-1.0 mm in diameter, specially prepared as supporting material for ZnO) were used as starting materials along with 1M NaOH as a mineraliser leading to the formation of a new class of photocatalytic material. The effect of the hydrothermal experimental parameters on the coating of ZnO nanoparticles, and the grain morphology, etc. was investigated and thus obtained ZnO coated calcium alumino silicate beads were characterised using X-ray diffraction, SEM, Fourier transform infrared and positron annihilation spectroscopy. Sunlight and ultraviolet light mediated photocatalytic degradation of amaranth dye was studied using hydrothermally prepared ZnO coated calcium alumino silicate beads. The effect of various parameters such as initial dye concentration, catalytic loading, pH of the medium, time duration and light source on the photodegradation of amaranth dye was investigated. Silk industrial effluents containing amaranth dye as a major constituent along with other dyes and dyeing auxiliaries were treated using ZnO coated calcium alumino silicate beads.

Item Type: Article
Subjects: F Earth Science > Geology
Divisions: Department of > Earth Science
Depositing User: lpa manjunath user
Date Deposited: 17 Jul 2019 07:08
Last Modified: 11 Dec 2019 11:02
URI: http://eprints.uni-mysore.ac.in/id/eprint/5307

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