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Issue 8, 2015
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Effective solar-based iron oxide supported HY zeolite catalyst for the decolorization of organic and simulated dyes

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Abstract

A HY zeolite supported by highly dispersed electrogenerated iron oxide nanoparticles (EGFe2O3/HY) was prepared by a facile electrochemical method and has been characterized using XRD, TEM, BET, UV-vis/DRS, and XPS. The formation of EGFe2O3 nanoparticles with a size of <30 nm, well distributed on the surface of HY, led to enhanced catalytic activity for the decolorization of organic dyes such as methylene blue (MB), congo red (CR), and methyl orange (MO) under sunlight irradiation. The MB dye shows the highest decolorization (99.9%) followed by CR (96.4%) and MO (91.3%). Kinetics study signifies that the reaction follows pseudo first-order kinetics, and the rate constants was determined using the Langmuir–Hinshelwood model which gave values of KR = 0.48 mg L−1 h−1, KLH = 3.83 L mg−1 for MB; KR = 0.39 mg L−1 h−1, KLH = 1.78 L mg−1 for CR; and KR = 0.29 mg L−1 h−1, KLH = 0.13 L mg−1 for MO. No dissolution of EGFe2O3 ions was detected during the photoreaction. The catalyst was stable with a slight decrease of decolorization (<13%) after five cycling runs. Good performance of the decolorization of simulated dyes was observed with nearly complete mineralization as measured by COD and TOC removal.

Graphical abstract: Effective solar-based iron oxide supported HY zeolite catalyst for the decolorization of organic and simulated dyes

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Publication details

The article was received on 10 Apr 2015, accepted on 09 Jun 2015 and first published on 10 Jun 2015


Article type: Paper
DOI: 10.1039/C5NJ00890E
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Citation: New J. Chem., 2015,39, 6377-6387
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    Effective solar-based iron oxide supported HY zeolite catalyst for the decolorization of organic and simulated dyes

    N. Sapawe, New J. Chem., 2015, 39, 6377
    DOI: 10.1039/C5NJ00890E

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