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...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-08-01
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| Series: | Catalysis Communications |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S156673672100042X |
| _version_ | 1818733445215420416 |
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| author | Katelyn R. Alley Quinn C. Cunneen Dario Prieto-Centurion |
| author_facet | Katelyn R. Alley Quinn C. Cunneen Dario Prieto-Centurion |
| author_sort | Katelyn R. Alley |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-12-17T23:49:35Z |
| format | Article |
| id | doaj.art-b54a3a3322264500b6fb5f9af606de82 |
| institution | Directory Open Access Journal |
| issn | 1873-3905 |
| language | English |
| last_indexed | 2024-12-17T23:49:35Z |
| publishDate | 2021-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Catalysis Communications |
| spelling | doaj.art-b54a3a3322264500b6fb5f9af606de822022-12-21T21:28:13ZengElsevierCatalysis 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 |
| 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 |
| title | 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_short | 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 |
| topic | Malathion Organophosphate neutralization Dispersed metal Fenton-like mechanism |
| url | http://www.sciencedirect.com/science/article/pii/S156673672100042X |
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