Effect of Nanoparticle Size in Pt/SiO<sub>2</sub> Catalyzed Nitrate Reduction in Liquid Phase

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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Main Authors: Khawer Shafqat, Satu Pitkäaho, Minna Tiainen, Lenka Matějová, Riitta L. Keiski
Format: Article
Language:English
Published: MDPI AG 2021-01-01
Series:Nanomaterials
Subjects:
nanoparticles
Pt
platinum
nitrate reduction
hydrogenation
wastewater
Online Access:https://www.mdpi.com/2079-4991/11/1/195
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spelling doaj-ac050e78da0e4f5aa9c7523caa03277a2021-01-15T00:01:16ZengMDPI AGNanomaterials2079-49912021-01-011119519510.3390/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
collection DOAJ
language English
format Article
sources DOAJ
author Khawer Shafqat
Satu Pitkäaho
Minna Tiainen
Lenka Matějová
Riitta L. Keiski
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
author_facet Khawer Shafqat
Satu Pitkäaho
Minna Tiainen
Lenka Matějová
Riitta L. Keiski
author_sort Khawer Shafqat
title 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_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_sort effect of nanoparticle size in pt/sio<sub>2</sub> catalyzed nitrate reduction in liquid phase
publisher MDPI AG
series Nanomaterials
issn 2079-4991
publishDate 2021-01-01
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.
topic nanoparticles
Pt
platinum
nitrate reduction
hydrogenation
wastewater
url https://www.mdpi.com/2079-4991/11/1/195
work_keys_str_mv AT khawershafqat effectofnanoparticlesizeinptsiosub2subcatalyzednitratereductioninliquidphase
AT satupitkaaho effectofnanoparticlesizeinptsiosub2subcatalyzednitratereductioninliquidphase
AT minnatiainen effectofnanoparticlesizeinptsiosub2subcatalyzednitratereductioninliquidphase
AT lenkamatejova effectofnanoparticlesizeinptsiosub2subcatalyzednitratereductioninliquidphase
AT riittalkeiski effectofnanoparticlesizeinptsiosub2subcatalyzednitratereductioninliquidphase
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