Catalytic Oxidation of Methylene Blue by Use of Natural Zeolite-Based Silver and Magnetite Nanocomposites

This work reports the synthesis of natural zeolite-based silver and magnetite nanocomposites and their application for the catalytic oxidation of methylene blue in water. The zeolite was impregnated with 5.5 wt.% Fe in the form of magnetite nanoparticles with size of 32 nm, and with 6.4 wt.% Ag in t...

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Published in:Processes 2020-04, Vol.8 (4), p.471
Main Authors: Kuntubek, Aldiyar, Kinayat, Nurassyl, Meiramkulova, Kulyash, Poulopoulos, Stavros G., Bear, Joseph C., Inglezakis, Vassilis J.
Format: Article
Language:English
Subjects:
Adsorption
Catalytic oxidation
Dyes
Efficiency
Hydrogen peroxide
Iron oxides
Magnetite
Methylene blue
Mineralization
Nanocomposites
Nanoparticles
Oxidants
Oxidation
Oxidizing agents
Scanning electron microscopy
Silver
Spectrum analysis
Zeolites
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cited_by cdi_FETCH-LOGICAL-c292t-9a8aa855bc0249fee61ecaec02c09b911f4e90a160017e5d2bb7c071575d98143
cites cdi_FETCH-LOGICAL-c292t-9a8aa855bc0249fee61ecaec02c09b911f4e90a160017e5d2bb7c071575d98143
container_end_page
container_issue 4
container_start_page 471
container_title Processes
container_volume 8
creator Kuntubek, Aldiyar
Kinayat, Nurassyl
Meiramkulova, Kulyash
Poulopoulos, Stavros G.
Bear, Joseph C.
Inglezakis, Vassilis J.
description This work reports the synthesis of natural zeolite-based silver and magnetite nanocomposites and their application for the catalytic oxidation of methylene blue in water. The zeolite was impregnated with 5.5 wt.% Fe in the form of magnetite nanoparticles with size of 32 nm, and with 6.4 wt.% Ag in the form of silver oxide and metallic silver nanoparticles with sizes of 42 and 20 nm, respectively. The results showed that physical adsorption contributed to the removal of methylene blue by 25–36% and that Fe3O4@NZU is superior to Ag2O@NZU and Ag0@NZU, leading to 55% removal without oxidant and 97% in the presence of H2O2. However, there is no evidence of significant mineralization of methylene blue. The application of reaction rate models showed that the reaction order changes from zero to first and second order depending on the H2O2 concentration.
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subjects Adsorption
Catalytic oxidation
Dyes
Efficiency
Hydrogen peroxide
Iron oxides
Magnetite
Methylene blue
Mineralization
Nanocomposites
Nanoparticles
Oxidants
Oxidation
Oxidizing agents
Scanning electron microscopy
Silver
Spectrum analysis
Zeolites
title Catalytic Oxidation of Methylene Blue by Use of Natural Zeolite-Based Silver and Magnetite Nanocomposites
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