Sunlight-driven photocatalytic mineralization of antibiotic chemical and selected enteric bacteria in water via zinc tungstate-imprinted kaolinite
This study reports the synthesis of sunlight-active zinc oxide-tungstate-kaolinite photocatalytic composite prepared via a green process (solvent-free mechano-thermal process) at an optimum temperature of 500°C for 1 h in a furnace. Electron Paramagnetic Resonance (EPR) study suggests the presence o...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2022-07-01
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| Series: | Green Chemistry Letters and Reviews |
| Subjects: | |
| Online Access: | https://www.tandfonline.com/doi/10.1080/17518253.2022.2124889 |
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| author | Moses O. Alfred Chidinma G. Olorunnisola Temidayo T. Oyetunde Peter Dare Raquel R. C. Vilela Andrea de Camargo Nurudeen A. Oladoja Martins O. Omorogie Olumide D. Olukanni Artur de Jesus Motheo Emmanuel I. Unuabonah |
| author_facet | Moses O. Alfred Chidinma G. Olorunnisola Temidayo T. Oyetunde Peter Dare Raquel R. C. Vilela Andrea de Camargo Nurudeen A. Oladoja Martins O. Omorogie Olumide D. Olukanni Artur de Jesus Motheo Emmanuel I. Unuabonah |
| author_sort | Moses O. Alfred |
| collection | DOAJ |
| description | This study reports the synthesis of sunlight-active zinc oxide-tungstate-kaolinite photocatalytic composite prepared via a green process (solvent-free mechano-thermal process) at an optimum temperature of 500°C for 1 h in a furnace. Electron Paramagnetic Resonance (EPR) study suggests the presence of W5+ defect states in the prepared photocatalytic composite (ZnWK-5), which is responsible for its photoactivity in visible light. Results from further analysis show that hole (h+) and superoxide radical (.O2−) are the major contributors to the photocatalytic efficiency of ZnWK-5 photocatalytic composite. This photocatalytic composite was used to treat water containing an antibiotic chemical-ampicillin (AMP) under sunlight. Mass spectrometry analysis of the treated water suggests that the mechanism of photodegradation of AMP is via several bond and ring cleavages, including amide bond, phenyl ring, and β-lactam ring cleavages. These cleavage reactions were followed by subsequent mineralization of ca. 98% after 5 h without the formation of toxic products. The introduction of phosphate and carbonate anions had a serious negative impact on the photocatalytic activity of the composite. However, the photocatalytic composite completely disinfected water contaminated with gram-(−ve) and gram-(+ve) bacteria. Even after five re-use cycles, the photocatalytic composite maintained a 90% photodegradation efficiency of ampicillin in water. |
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| id | doaj.art-03b1b8f4e1214ce982c277b2f3287444 |
| institution | Directory Open Access Journal |
| issn | 1751-8253 1751-7192 |
| language | English |
| last_indexed | 2025-03-21T05:51:26Z |
| publishDate | 2022-07-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Green Chemistry Letters and Reviews |
| spelling | doaj.art-03b1b8f4e1214ce982c277b2f32874442024-07-23T12:12:11ZengTaylor & Francis GroupGreen Chemistry Letters and Reviews1751-82531751-71922022-07-0115370572310.1080/17518253.2022.2124889Sunlight-driven photocatalytic mineralization of antibiotic chemical and selected enteric bacteria in water via zinc tungstate-imprinted kaoliniteMoses O. Alfred0Chidinma G. Olorunnisola1Temidayo T. Oyetunde2Peter Dare3Raquel R. C. Vilela4Andrea de Camargo5Nurudeen A. Oladoja6Martins O. Omorogie7Olumide D. Olukanni8Artur de Jesus Motheo9Emmanuel I. Unuabonah10African Centre of Excellence for Water and Environment Research (ACEWATER), Redeemer’s University, Ede, NigeriaAfrican Centre of Excellence for Water and Environment Research (ACEWATER), Redeemer’s University, Ede, NigeriaDepartment of Chemical Sciences, Redeemer’s University, Ede, NigeriaAfrican Centre of Excellence for Water and Environment Research (ACEWATER), Redeemer’s University, Ede, NigeriaSão Carlos Institute of Physics, University of São Paulo, São Carlos, BrazilSão Carlos Institute of Physics, University of São Paulo, São Carlos, BrazilHydrochemistry Research Laboratory, Department of Chemical Sciences, Adekunle Ajasin University, Akungba-Akoko, NigeriaAfrican Centre of Excellence for Water and Environment Research (ACEWATER), Redeemer’s University, Ede, NigeriaAfrican Centre of Excellence for Water and Environment Research (ACEWATER), Redeemer’s University, Ede, NigeriaSão Carlos Institute of Chemistry, University of São Paulo, São Carlos, BrazilAfrican Centre of Excellence for Water and Environment Research (ACEWATER), Redeemer’s University, Ede, NigeriaThis study reports the synthesis of sunlight-active zinc oxide-tungstate-kaolinite photocatalytic composite prepared via a green process (solvent-free mechano-thermal process) at an optimum temperature of 500°C for 1 h in a furnace. Electron Paramagnetic Resonance (EPR) study suggests the presence of W5+ defect states in the prepared photocatalytic composite (ZnWK-5), which is responsible for its photoactivity in visible light. Results from further analysis show that hole (h+) and superoxide radical (.O2−) are the major contributors to the photocatalytic efficiency of ZnWK-5 photocatalytic composite. This photocatalytic composite was used to treat water containing an antibiotic chemical-ampicillin (AMP) under sunlight. Mass spectrometry analysis of the treated water suggests that the mechanism of photodegradation of AMP is via several bond and ring cleavages, including amide bond, phenyl ring, and β-lactam ring cleavages. These cleavage reactions were followed by subsequent mineralization of ca. 98% after 5 h without the formation of toxic products. The introduction of phosphate and carbonate anions had a serious negative impact on the photocatalytic activity of the composite. However, the photocatalytic composite completely disinfected water contaminated with gram-(−ve) and gram-(+ve) bacteria. Even after five re-use cycles, the photocatalytic composite maintained a 90% photodegradation efficiency of ampicillin in water.https://www.tandfonline.com/doi/10.1080/17518253.2022.2124889Kaolinitephoto-mineralizationampicillinwater disinfectionAdvanced Oxidation Processes (AOP) |
| spellingShingle | Moses O. Alfred Chidinma G. Olorunnisola Temidayo T. Oyetunde Peter Dare Raquel R. C. Vilela Andrea de Camargo Nurudeen A. Oladoja Martins O. Omorogie Olumide D. Olukanni Artur de Jesus Motheo Emmanuel I. Unuabonah Sunlight-driven photocatalytic mineralization of antibiotic chemical and selected enteric bacteria in water via zinc tungstate-imprinted kaolinite Green Chemistry Letters and Reviews Kaolinite photo-mineralization ampicillin water disinfection Advanced Oxidation Processes (AOP) |
| title | Sunlight-driven photocatalytic mineralization of antibiotic chemical and selected enteric bacteria in water via zinc tungstate-imprinted kaolinite |
| title_full | Sunlight-driven photocatalytic mineralization of antibiotic chemical and selected enteric bacteria in water via zinc tungstate-imprinted kaolinite |
| title_fullStr | Sunlight-driven photocatalytic mineralization of antibiotic chemical and selected enteric bacteria in water via zinc tungstate-imprinted kaolinite |
| title_full_unstemmed | Sunlight-driven photocatalytic mineralization of antibiotic chemical and selected enteric bacteria in water via zinc tungstate-imprinted kaolinite |
| title_short | Sunlight-driven photocatalytic mineralization of antibiotic chemical and selected enteric bacteria in water via zinc tungstate-imprinted kaolinite |
| title_sort | sunlight driven photocatalytic mineralization of antibiotic chemical and selected enteric bacteria in water via zinc tungstate imprinted kaolinite |
| topic | Kaolinite photo-mineralization ampicillin water disinfection Advanced Oxidation Processes (AOP) |
| url | https://www.tandfonline.com/doi/10.1080/17518253.2022.2124889 |
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