Neutralization of organophosphate over highly dispersed Fe, Cu, and Co on silica

Organophosphates are highly toxic compounds used as pesticides and chemical warfare agents. Herein, we describe SiO2-supported Fe, Co, and Cu catalysts that degrade organophosphate pesticide malathion at mild temperatures in the presence of H2O2. These catalysts are prepared by impregnation of SiO2...

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Main Authors:	Katelyn R. Alley, Quinn C. Cunneen, Dario Prieto-Centurion
Format:	Article
Language:	English
Published:	Elsevier 2021-08-01
Series:	Catalysis Communications
Subjects:	Malathion Organophosphate neutralization Dispersed metal Fenton-like mechanism
Online Access:	http://www.sciencedirect.com/science/article/pii/S156673672100042X

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record_format	Article
spelling	doaj-b54a3a3322264500b6fb5f9af606de822021-05-12T04:09:52ZengElsevierCatalysis Communications1873-39052021-08-01156106319Neutralization of organophosphate over highly dispersed Fe, Cu, and Co on silicaKatelyn R. Alley0Quinn C. Cunneen1Dario Prieto-Centurion2Applied Surface Science Laboratory, Montana Technological University, USA; Chemistry and Geochemistry Department, Montana Technological University, USAApplied Surface Science Laboratory, Montana Technological University, USA; Chemistry and Geochemistry Department, Montana Technological University, USAApplied Surface Science Laboratory, Montana Technological University, USA; Mechanical Engineering Department, Montana Technological University, USA; Corresponding author at: Applied Surface Science Laboratory, Montana Technological University, USA.Organophosphates are highly toxic compounds used as pesticides and chemical warfare agents. Herein, we describe SiO2-supported Fe, Co, and Cu catalysts that degrade organophosphate pesticide malathion at mild temperatures in the presence of H2O2. These catalysts are prepared by impregnation of SiO2 with solutions of bulky metal chelates that promote dispersion and low coordination, as shown spectroscopically. Turnover frequencies of catalysts prepared from chelated precursors are higher than those of controls prepared from nitrates and oxides, and independent of metal loading. The latter indicates equal activity and accessibility of active sites and suggests invariant structure in the loading range studied.http://www.sciencedirect.com/science/article/pii/S156673672100042XMalathionOrganophosphate neutralizationDispersed metalFenton-like mechanism
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Katelyn R. Alley Quinn C. Cunneen Dario Prieto-Centurion
spellingShingle	Katelyn R. Alley Quinn C. Cunneen Dario Prieto-Centurion Neutralization of organophosphate over highly dispersed Fe, Cu, and Co on silica Catalysis Communications Malathion Organophosphate neutralization Dispersed metal Fenton-like mechanism
author_facet	Katelyn R. Alley Quinn C. Cunneen Dario Prieto-Centurion
author_sort	Katelyn R. Alley
title	Neutralization of organophosphate over highly dispersed Fe, Cu, and Co on silica
title_short	Neutralization of organophosphate over highly dispersed Fe, Cu, and Co on silica
title_full	Neutralization of organophosphate over highly dispersed Fe, Cu, and Co on silica
title_fullStr	Neutralization of organophosphate over highly dispersed Fe, Cu, and Co on silica
title_full_unstemmed	Neutralization of organophosphate over highly dispersed Fe, Cu, and Co on silica
title_sort	neutralization of organophosphate over highly dispersed fe, cu, and co on silica
publisher	Elsevier
series	Catalysis Communications
issn	1873-3905
publishDate	2021-08-01
description	Organophosphates are highly toxic compounds used as pesticides and chemical warfare agents. Herein, we describe SiO2-supported Fe, Co, and Cu catalysts that degrade organophosphate pesticide malathion at mild temperatures in the presence of H2O2. These catalysts are prepared by impregnation of SiO2 with solutions of bulky metal chelates that promote dispersion and low coordination, as shown spectroscopically. Turnover frequencies of catalysts prepared from chelated precursors are higher than those of controls prepared from nitrates and oxides, and independent of metal loading. The latter indicates equal activity and accessibility of active sites and suggests invariant structure in the loading range studied.
topic	Malathion Organophosphate neutralization Dispersed metal Fenton-like mechanism
url	http://www.sciencedirect.com/science/article/pii/S156673672100042X
work_keys_str_mv	AT katelynralley neutralizationoforganophosphateoverhighlydispersedfecuandcoonsilica AT quinnccunneen neutralizationoforganophosphateoverhighlydispersedfecuandcoonsilica AT darioprietocenturion neutralizationoforganophosphateoverhighlydispersedfecuandcoonsilica
_version_	1721443551763496960

Neutralization of organophosphate over highly dispersed Fe, Cu, and Co on silica

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