Electrochemical strategy for grown ZnO nanoparticles deposited onto HY zeolite with enhanced photodecolorization of methylene blue: Effect of the formation of Si O Zn bonds

Sapawe, N. and Jalil, A.A. and Triwahyono, S. and Sah, R.N.R.A. and Jusoh, N.W.C. and Hairom, Nur Hanis Hayati and Efendi, J. (2013) Electrochemical strategy for grown ZnO nanoparticles deposited onto HY zeolite with enhanced photodecolorization of methylene blue: Effect of the formation of Si O Zn bonds. Applied Catalysis A: General, 456. pp. 144-158. ISSN 0926-860X

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Official URL: http://dx.doi.org/10.1016/j.apcata.2013.02.025

Abstract

Nanoparticles of electrogenerated zinc-supported HY zeolite (EGZnO/HY) catalyst were prepared by a simple electrochemical method. The interaction between zinc species and HY support during the electrolysis was found to affect the EGZnO/HY structure. In addition to the formation of EGZnO nanoparticles (<30 nm in size) that distributed on the surface of HY support, an isomorphous substitution of Al with Zn also occurred in the aluminosilicate framework to result in a Si O Zn bonds. The photoactivity of EGZnO/HY was tested on the decolorization of methylene blue (MB). An amount of 0.375 g L−1 of 1 wt% EGZnO/HY was found to be the optimum dosage for 10 mg L−1 MB, which resulted in 80% of maximum decolorization after 6 h of contact time at pH 3 under fluorescent light (420 nm). Increasing the EGZnO loading led to additional formation of Si O Zn bonds and lessened the number of EGZnO nanoparticles, which then reduced the photodecolorization percentage of MB.The photocatalytic reaction was follows the first-order Langmuir–Hinshelwood model, and gives partially mineralization. The photocatalyst was still stable after five cycling runs with no Zn leaching.

Item Type:	Article
Uncontrolled Keywords:	EGZnO/HY; Electrochemical; Isomorphous substitution; Photodecolorization; Methylene blue
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA401-492 Materials of engineering and construction. Mechanics of materials
Divisions:	Faculty of Engineering Technology > Department of Civil Engineering Technology
Depositing User:	Miss Afiqah Faiqah Mohd Hafiz
Date Deposited:	16 Nov 2021 07:01
Last Modified:	16 Nov 2021 07:01
URI:	http://eprints.uthm.edu.my/id/eprint/3131

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