Photocatalytic Conversion of Organic Pollutants in Air: Quantum Yields Using a Silver/Nitrogen/TiO<sub>2</sub> Mesoporous Semiconductor under Visible Light
This research studies the photocatalytic conversion of methanol (25–90 µmol/L range) as a volatile organic compound (VOC) surrogate into CO<sub>2</sub>, using a N/Ag/TiO<sub>2</sub> photocatalyst under visible light irradiation in a Photo-CREC Air unit. The N/Ag/TiO<sub>...
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MDPI AG
2021-04-01
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| Series: | Catalysts |
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| Online Access: | https://www.mdpi.com/2073-4344/11/5/529 |
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| author | Adilah Sirivallop Salvador Escobedo Thanita Areerob Hugo de Lasa Siriluk Chiarakorn |
| author_facet | Adilah Sirivallop Salvador Escobedo Thanita Areerob Hugo de Lasa Siriluk Chiarakorn |
| author_sort | Adilah Sirivallop |
| collection | DOAJ |
| description | This research studies the photocatalytic conversion of methanol (25–90 µmol/L range) as a volatile organic compound (VOC) surrogate into CO<sub>2</sub>, using a N/Ag/TiO<sub>2</sub> photocatalyst under visible light irradiation in a Photo-CREC Air unit. The N/Ag/TiO<sub>2</sub> mesh supported photocatalyst is prepared via the solvothermal method. While the bare-TiO<sub>2</sub> is inactive under visible light, the N/Ag/TiO<sub>2</sub> 2 wt.% loaded stainless-steel woven mesh displays 35% quantum yields, with 80% absorbed photons and 60% methanol conversion in a 110 min irradiation period. Results obtained are assigned to silver surface plasmon resonance, silver and nitrogen species synergistic impacts on band gap, and their influence on particle agglomerate size and semiconductor acidity. The determined quantum yields under visible light in a Photo-CREC Air unit, are the highest reported in the technical literature, that these authors are aware of, with this opening unique opportunity for the use of visible light for the purification of air from VOC contaminants. |
| first_indexed | 2024-03-10T12:07:49Z |
| format | Article |
| id | doaj.art-a13cfd6f65f4447ea0718d3af66f692a |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-10T12:07:49Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-a13cfd6f65f4447ea0718d3af66f692a2023-11-21T16:28:59ZengMDPI AGCatalysts2073-43442021-04-0111552910.3390/catal11050529Photocatalytic Conversion of Organic Pollutants in Air: Quantum Yields Using a Silver/Nitrogen/TiO<sub>2</sub> Mesoporous Semiconductor under Visible LightAdilah Sirivallop0Salvador Escobedo1Thanita Areerob2Hugo de Lasa3Siriluk Chiarakorn4Division of Environmental Technology, The Join Graduate School of Energy and Environment, King Mongkut’s University of Technology Thonburi, Bangkok 10140, ThailandChemical Reactor Engineering Centre (CREC), Department of Chemical and Biochemical Engineering, Faculty of Engineering, University of Western Ontario, London, ON N6A 5B9, CanadaFaculty of Technology and Environment, Phuket Campus, Prince of Songkla University, Phuket 83120, ThailandChemical Reactor Engineering Centre (CREC), Department of Chemical and Biochemical Engineering, Faculty of Engineering, University of Western Ontario, London, ON N6A 5B9, CanadaEnvironmental Technology Program, School of Energy, Environment and Materials, King Mongkut’s University of Technology Thonburi, Bangkok 10140, ThailandThis research studies the photocatalytic conversion of methanol (25–90 µmol/L range) as a volatile organic compound (VOC) surrogate into CO<sub>2</sub>, using a N/Ag/TiO<sub>2</sub> photocatalyst under visible light irradiation in a Photo-CREC Air unit. The N/Ag/TiO<sub>2</sub> mesh supported photocatalyst is prepared via the solvothermal method. While the bare-TiO<sub>2</sub> is inactive under visible light, the N/Ag/TiO<sub>2</sub> 2 wt.% loaded stainless-steel woven mesh displays 35% quantum yields, with 80% absorbed photons and 60% methanol conversion in a 110 min irradiation period. Results obtained are assigned to silver surface plasmon resonance, silver and nitrogen species synergistic impacts on band gap, and their influence on particle agglomerate size and semiconductor acidity. The determined quantum yields under visible light in a Photo-CREC Air unit, are the highest reported in the technical literature, that these authors are aware of, with this opening unique opportunity for the use of visible light for the purification of air from VOC contaminants.https://www.mdpi.com/2073-4344/11/5/529photocatalysismethanolsilver and nitrogentitanium dioxidevisible light |
| spellingShingle | Adilah Sirivallop Salvador Escobedo Thanita Areerob Hugo de Lasa Siriluk Chiarakorn Photocatalytic Conversion of Organic Pollutants in Air: Quantum Yields Using a Silver/Nitrogen/TiO<sub>2</sub> Mesoporous Semiconductor under Visible Light Catalysts photocatalysis methanol silver and nitrogen titanium dioxide visible light |
| title | Photocatalytic Conversion of Organic Pollutants in Air: Quantum Yields Using a Silver/Nitrogen/TiO<sub>2</sub> Mesoporous Semiconductor under Visible Light |
| title_full | Photocatalytic Conversion of Organic Pollutants in Air: Quantum Yields Using a Silver/Nitrogen/TiO<sub>2</sub> Mesoporous Semiconductor under Visible Light |
| title_fullStr | Photocatalytic Conversion of Organic Pollutants in Air: Quantum Yields Using a Silver/Nitrogen/TiO<sub>2</sub> Mesoporous Semiconductor under Visible Light |
| title_full_unstemmed | Photocatalytic Conversion of Organic Pollutants in Air: Quantum Yields Using a Silver/Nitrogen/TiO<sub>2</sub> Mesoporous Semiconductor under Visible Light |
| title_short | Photocatalytic Conversion of Organic Pollutants in Air: Quantum Yields Using a Silver/Nitrogen/TiO<sub>2</sub> Mesoporous Semiconductor under Visible Light |
| title_sort | photocatalytic conversion of organic pollutants in air quantum yields using a silver nitrogen tio sub 2 sub mesoporous semiconductor under visible light |
| topic | photocatalysis methanol silver and nitrogen titanium dioxide visible light |
| url | https://www.mdpi.com/2073-4344/11/5/529 |
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