The Catalytic Role of Superparamagnetic Iron Oxide Nanoparticles as a Support Material for TiO<sub>2</sub> and ZnO on Chlorpyrifos Photodegradation in an Aqueous Solution
Chlorpyrifos (CP) is a globally used pesticide with acute toxicity. This work studied the photocatalytic degradation of CP using TiO<sub>2</sub>, ZnO nanoparticles, and nanocomposites of TiO<sub>2</sub> and ZnO supported on SPIONs (SPION@SiO<sub>2</sub>@TiO<sub...
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MDPI AG
2024-02-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/14/3/299 |
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| author | Wence Herrera Joelis Vera Edward Hermosilla Marcela Diaz Gonzalo R. Tortella Roberta Albino Dos Reis Amedea B. Seabra María Cristina Diez Olga Rubilar |
| author_facet | Wence Herrera Joelis Vera Edward Hermosilla Marcela Diaz Gonzalo R. Tortella Roberta Albino Dos Reis Amedea B. Seabra María Cristina Diez Olga Rubilar |
| author_sort | Wence Herrera |
| collection | DOAJ |
| description | Chlorpyrifos (CP) is a globally used pesticide with acute toxicity. This work studied the photocatalytic degradation of CP using TiO<sub>2</sub>, ZnO nanoparticles, and nanocomposites of TiO<sub>2</sub> and ZnO supported on SPIONs (SPION@SiO<sub>2</sub>@TiO<sub>2</sub> and SPION@SiO<sub>2</sub>@ZnO). The nanocomposites were synthesized by multi-step incipient wetness impregnation. The effects of the initial pH, catalyst type, and dose were evaluated. The nanocomposites of SPION@SiO<sub>2</sub>@TiO<sub>2</sub> and SPION@SiO<sub>2</sub>@ZnO showed higher CP photodegradation levels than free nanoparticles, reaching 95.6% and 82.3%, respectively, at pH 7. The findings indicate that iron oxide, as a support material for TiO<sub>2</sub> and ZnO, extended absorption edges and delayed the electron–hole recombination of the nanocomposites, improving their photocatalytic efficiency. At the same time, these nanocomposites, especially SPION@SiO<sub>2</sub>@TiO<sub>2</sub>, showed efficient degradation of 3,5,6-trichloropyridinol (TCP), one of the final metabolites of CP. The stability and reuse of this nanocomposite were also evaluated, with 74.6% efficiency found after six cycles. Therefore, this nanomaterial represents an eco-friendly, reusable, and effective alternative for the degradation of chlorpyrifos in wastewater treatment. |
| first_indexed | 2024-03-08T03:51:33Z |
| format | Article |
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| language | English |
| last_indexed | 2024-03-08T03:51:33Z |
| publishDate | 2024-02-01 |
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| series | Nanomaterials |
| spelling | doaj.art-3a3513c33f7b4e0ebd5ec899f5ac70d12024-02-09T15:19:30ZengMDPI AGNanomaterials2079-49912024-02-0114329910.3390/nano14030299The Catalytic Role of Superparamagnetic Iron Oxide Nanoparticles as a Support Material for TiO<sub>2</sub> and ZnO on Chlorpyrifos Photodegradation in an Aqueous SolutionWence Herrera0Joelis Vera1Edward Hermosilla2Marcela Diaz3Gonzalo R. Tortella4Roberta Albino Dos Reis5Amedea B. Seabra6María Cristina Diez7Olga Rubilar8Programa de Doctorado en Ciencias de Recursos Naturales, Universidad de La Frontera, Temuco 4780000, ChilePrograma de Doctorado en Ciencias de la Ingeniería Mención Bioprocesos, Universidad de la Frontera, Temuco 4780000, ChileCentro de Excelencia en Investigación Biotecnológica Aplicada al Medio Ambiente CIBAMA-BIOREN, Universidad de La Frontera, Temuco 4780000, ChileCentro de Excelencia en Investigación Biotecnológica Aplicada al Medio Ambiente CIBAMA-BIOREN, Universidad de La Frontera, Temuco 4780000, ChileCentro de Excelencia en Investigación Biotecnológica Aplicada al Medio Ambiente CIBAMA-BIOREN, Universidad de La Frontera, Temuco 4780000, ChileCenter for Natural and Human Sciences, Universidade Federal do ABC, Santo André 09210-580, SP, BrazilCenter for Natural and Human Sciences, Universidade Federal do ABC, Santo André 09210-580, SP, BrazilCentro de Excelencia en Investigación Biotecnológica Aplicada al Medio Ambiente CIBAMA-BIOREN, Universidad de La Frontera, Temuco 4780000, ChileCentro de Excelencia en Investigación Biotecnológica Aplicada al Medio Ambiente CIBAMA-BIOREN, Universidad de La Frontera, Temuco 4780000, ChileChlorpyrifos (CP) is a globally used pesticide with acute toxicity. This work studied the photocatalytic degradation of CP using TiO<sub>2</sub>, ZnO nanoparticles, and nanocomposites of TiO<sub>2</sub> and ZnO supported on SPIONs (SPION@SiO<sub>2</sub>@TiO<sub>2</sub> and SPION@SiO<sub>2</sub>@ZnO). The nanocomposites were synthesized by multi-step incipient wetness impregnation. The effects of the initial pH, catalyst type, and dose were evaluated. The nanocomposites of SPION@SiO<sub>2</sub>@TiO<sub>2</sub> and SPION@SiO<sub>2</sub>@ZnO showed higher CP photodegradation levels than free nanoparticles, reaching 95.6% and 82.3%, respectively, at pH 7. The findings indicate that iron oxide, as a support material for TiO<sub>2</sub> and ZnO, extended absorption edges and delayed the electron–hole recombination of the nanocomposites, improving their photocatalytic efficiency. At the same time, these nanocomposites, especially SPION@SiO<sub>2</sub>@TiO<sub>2</sub>, showed efficient degradation of 3,5,6-trichloropyridinol (TCP), one of the final metabolites of CP. The stability and reuse of this nanocomposite were also evaluated, with 74.6% efficiency found after six cycles. Therefore, this nanomaterial represents an eco-friendly, reusable, and effective alternative for the degradation of chlorpyrifos in wastewater treatment.https://www.mdpi.com/2079-4991/14/3/299degradationnanocompositespesticidesTCPtitanium dioxidezinc oxide |
| spellingShingle | Wence Herrera Joelis Vera Edward Hermosilla Marcela Diaz Gonzalo R. Tortella Roberta Albino Dos Reis Amedea B. Seabra María Cristina Diez Olga Rubilar The Catalytic Role of Superparamagnetic Iron Oxide Nanoparticles as a Support Material for TiO<sub>2</sub> and ZnO on Chlorpyrifos Photodegradation in an Aqueous Solution Nanomaterials degradation nanocomposites pesticides TCP titanium dioxide zinc oxide |
| title | The Catalytic Role of Superparamagnetic Iron Oxide Nanoparticles as a Support Material for TiO<sub>2</sub> and ZnO on Chlorpyrifos Photodegradation in an Aqueous Solution |
| title_full | The Catalytic Role of Superparamagnetic Iron Oxide Nanoparticles as a Support Material for TiO<sub>2</sub> and ZnO on Chlorpyrifos Photodegradation in an Aqueous Solution |
| title_fullStr | The Catalytic Role of Superparamagnetic Iron Oxide Nanoparticles as a Support Material for TiO<sub>2</sub> and ZnO on Chlorpyrifos Photodegradation in an Aqueous Solution |
| title_full_unstemmed | The Catalytic Role of Superparamagnetic Iron Oxide Nanoparticles as a Support Material for TiO<sub>2</sub> and ZnO on Chlorpyrifos Photodegradation in an Aqueous Solution |
| title_short | The Catalytic Role of Superparamagnetic Iron Oxide Nanoparticles as a Support Material for TiO<sub>2</sub> and ZnO on Chlorpyrifos Photodegradation in an Aqueous Solution |
| title_sort | catalytic role of superparamagnetic iron oxide nanoparticles as a support material for tio sub 2 sub and zno on chlorpyrifos photodegradation in an aqueous solution |
| topic | degradation nanocomposites pesticides TCP titanium dioxide zinc oxide |
| url | https://www.mdpi.com/2079-4991/14/3/299 |
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