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Photodegradation of N-Methyldiethanolamine over ZnO/SnO2 coupled photocatalysts

Ali, Rusmidah and Wan Abu Bakar, Wan Azelee and Mislan, S. S. and Sharifuddin, M. A. (2010) Photodegradation of N-Methyldiethanolamine over ZnO/SnO2 coupled photocatalysts. Scientia Iranica, 17 (2). 124 -130. ISSN 1026-3098

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Official URL: http://scientiairanica.sharif.edu/article_3374.htm...

Abstract

A photocatalyst semiconductor can be used to remove organic pollutants from wastewater in the presence of UV light. In this research, coupled ZnO/SnO2 semiconductors with 1:1 and 2:1 ratios were prepared using the co-precipitation method. The prepared coupled ZnO/SnO2 photocatalyst was tested towards the photodegradation of simulated N-Methyldiethanolamine (MDEA) under UV-irradiation (λ = 365 nm, 100 V, 6 W). The ZnO/SnO2 was characterized using UV diffused reflectance spectroscopy and X-ray diffraction. The band gap energy for ZnO/SnO2 (ZS) catalyst calcined at 200 C, 400 C, 600 C and 900 C were 3.22, 3.13, 3.12 and 3.07 eV, respectively, while for Z2 S were 3.71, 3.28, 3.16, and 3.14 eV, respectively. XRD results indicated that ZS and Z2 S catalysts possessed mixed phases of ZnO, SnO2 and Zn2 SnO4 at a calcinations temperature above 600 C. The ZnO/SnO2 (2:1) catalyst, which was calcined at 600 C for 9 hours, gave the optimum percentage photodegradation of MDEA with 39.18%. The percentage degradation of MDEA was measured using ion chromatography with retention time at the measured peak of 4-5 minutes. The optimum system was applied on the photodegradation of MDEA in petroleum wastewater. The percentage degradation of MDEA in petroleum wastewater was 23.38%.

Item Type:Article
Uncontrolled Keywords:Band gap energy, MDEA, photocatalyst, photodegradation, SnO2, ZnO
Subjects:Q Science > QD Chemistry
Divisions:Science
ID Code:26628
Deposited By: Yanti Mohd Shah
Deposited On:18 Jul 2012 11:39
Last Modified:30 Nov 2018 15:06

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