Effect of Nanoparticle Size in Pt/SiO<sub>2</sub> Catalyzed Nitrate Reduction in Liquid Phase
Effect of platinum nanoparticle size on catalytic reduction of nitrate in liquid phase was examined under ambient conditions by using hydrogen as a reducing agent. For the size effect study, Pt nanoparticles with sizes of 2, 4 and 8 nm were loaded silica support. TEM images of Pt nanoparticles showe...
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| Format: | Article |
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MDPI AG
2021-01-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/1/195 |
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| author | Khawer Shafqat Satu Pitkäaho Minna Tiainen Lenka Matějová Riitta L. Keiski |
| author_facet | Khawer Shafqat Satu Pitkäaho Minna Tiainen Lenka Matějová Riitta L. Keiski |
| author_sort | Khawer Shafqat |
| collection | DOAJ |
| description | Effect of platinum nanoparticle size on catalytic reduction of nitrate in liquid phase was examined under ambient conditions by using hydrogen as a reducing agent. For the size effect study, Pt nanoparticles with sizes of 2, 4 and 8 nm were loaded silica support. TEM images of Pt nanoparticles showed that homogeneous morphologies as well as narrow size distributions were achieved during the preparation. All three catalysts showed high activity and were able to reduce nitrate below the recommended limit of 50 mg/L in drinking water. The highest catalytic activity was seen with 8 nm platinum; however, the product selectivity for N<sub>2</sub> was highest with 4 nm platinum. In addition, the possibility of PVP capping agent acting as a promoter in the reaction is highlighted. |
| first_indexed | 2024-03-09T04:51:14Z |
| format | Article |
| id | doaj.art-ac050e78da0e4f5aa9c7523caa03277a |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T04:51:14Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-ac050e78da0e4f5aa9c7523caa03277a2023-12-03T13:11:01ZengMDPI AGNanomaterials2079-49912021-01-0111119510.3390/nano11010195Effect of Nanoparticle Size in Pt/SiO<sub>2</sub> Catalyzed Nitrate Reduction in Liquid PhaseKhawer Shafqat0Satu Pitkäaho1Minna Tiainen2Lenka Matějová3Riitta L. Keiski4Environmental and Chemical Engineering Research Unit, University of Oulu, P.O. Box 4300, FI-90014 Oulu, FinlandEnvironmental and Chemical Engineering Research Unit, University of Oulu, P.O. Box 4300, FI-90014 Oulu, FinlandEnvironmental and Chemical Engineering Research Unit, University of Oulu, P.O. Box 4300, FI-90014 Oulu, FinlandInstitute of Environmental Technology, CEET, VSB-Technical University of Ostrava, 17. Listopadu 2172/15, 708 00 Ostrava-Poruba, Czech RepublicEnvironmental and Chemical Engineering Research Unit, University of Oulu, P.O. Box 4300, FI-90014 Oulu, FinlandEffect of platinum nanoparticle size on catalytic reduction of nitrate in liquid phase was examined under ambient conditions by using hydrogen as a reducing agent. For the size effect study, Pt nanoparticles with sizes of 2, 4 and 8 nm were loaded silica support. TEM images of Pt nanoparticles showed that homogeneous morphologies as well as narrow size distributions were achieved during the preparation. All three catalysts showed high activity and were able to reduce nitrate below the recommended limit of 50 mg/L in drinking water. The highest catalytic activity was seen with 8 nm platinum; however, the product selectivity for N<sub>2</sub> was highest with 4 nm platinum. In addition, the possibility of PVP capping agent acting as a promoter in the reaction is highlighted.https://www.mdpi.com/2079-4991/11/1/195nanoparticlesPtplatinumnitrate reductionhydrogenationwastewater |
| spellingShingle | Khawer Shafqat Satu Pitkäaho Minna Tiainen Lenka Matějová Riitta L. Keiski Effect of Nanoparticle Size in Pt/SiO<sub>2</sub> Catalyzed Nitrate Reduction in Liquid Phase Nanomaterials nanoparticles Pt platinum nitrate reduction hydrogenation wastewater |
| title | Effect of Nanoparticle Size in Pt/SiO<sub>2</sub> Catalyzed Nitrate Reduction in Liquid Phase |
| title_full | Effect of Nanoparticle Size in Pt/SiO<sub>2</sub> Catalyzed Nitrate Reduction in Liquid Phase |
| title_fullStr | Effect of Nanoparticle Size in Pt/SiO<sub>2</sub> Catalyzed Nitrate Reduction in Liquid Phase |
| title_full_unstemmed | Effect of Nanoparticle Size in Pt/SiO<sub>2</sub> Catalyzed Nitrate Reduction in Liquid Phase |
| title_short | Effect of Nanoparticle Size in Pt/SiO<sub>2</sub> Catalyzed Nitrate Reduction in Liquid Phase |
| title_sort | effect of nanoparticle size in pt sio sub 2 sub catalyzed nitrate reduction in liquid phase |
| topic | nanoparticles Pt platinum nitrate reduction hydrogenation wastewater |
| url | https://www.mdpi.com/2079-4991/11/1/195 |
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