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Facile Use of Silver Nanoparticles-Loaded Alumina/Silica in Nanofluid Formulations for Enhanced Catalytic Performance toward 4-Nitrophenol Reduction
The introduction of toxic chemicals into the environment can result in water pollution leading to the degradation of biodiversity as well as human health. This study presents a new approach of using metal oxides (Al(2)O(3) and SiO(2)) modified with a plasmonic metal (silver, Ag) nanoparticles (NPs)-...
Autores principales: | , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7999000/ https://www.ncbi.nlm.nih.gov/pubmed/33803950 http://dx.doi.org/10.3390/ijerph18062994 |
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author | Mannu, Rashmi Karthikeyan, Vaithinathan Veerappa, Murugendrappa Malalkere Roy, Vellaisamy A. L. Gopalan, Anantha-Iyengar Saianand, Gopalan Sonar, Prashant Xu, Binrui Lee, Kwang-Pill Kim, Wha-Jung Lee, Dong-Eun Kannan, Venkatramanan |
author_facet | Mannu, Rashmi Karthikeyan, Vaithinathan Veerappa, Murugendrappa Malalkere Roy, Vellaisamy A. L. Gopalan, Anantha-Iyengar Saianand, Gopalan Sonar, Prashant Xu, Binrui Lee, Kwang-Pill Kim, Wha-Jung Lee, Dong-Eun Kannan, Venkatramanan |
author_sort | Mannu, Rashmi |
collection | PubMed |
description | The introduction of toxic chemicals into the environment can result in water pollution leading to the degradation of biodiversity as well as human health. This study presents a new approach of using metal oxides (Al(2)O(3) and SiO(2)) modified with a plasmonic metal (silver, Ag) nanoparticles (NPs)-based nanofluid (NF) formulation for environmental remediation purposes. Firstly, we prepared the Al(2)O(3) and SiO(2) NFs of different concentrations (0.2 to 2.0 weight %) by ultrasonic-assisted dispersion of Al(2)O(3) and SiO(2) NPs with water as the base fluid. The thermo-physical (viscosity, activation energy, and thermal conductivity), electrical (AC conductivity and dielectric constant) and physical (ultrasonic velocity, density, refractive index) and stability characteristics were comparatively evaluated. The Al(2)O(3) and SiO(2) NPs were then catalytically activated by loading silver NPs to obtain Al(2)O(3)/SiO(2)@Ag composite NPs. The catalytic reduction of 4-nitrophenol (4-NP) with Al(2)O(3)/SiO(2)@Ag based NFs was followed. The catalytic efficiency of Al(2)O(3)@Ag NF and SiO(2)@Ag NF, for the 4-NP catalysis, is compared. Based on the catalytic rate constant evaluation, the catalytic reduction efficiency for 4-NP is found to be superior for 2% weight Al(2)O(3)@Ag NF (92.9 × 10(−3) s(−1)) as compared to the SiO(2)@Ag NF (29.3 × 10(−3) s(−1)). Importantly, the enhanced catalytic efficiency of 2% weight Al(2)O(3)@Ag NF for 4-NP removal is much higher than other metal NPs based catalysts reported in the literature, signifying the importance of NF formulation-based catalysis. |
format | Online Article Text |
id | pubmed-7999000 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-79990002021-03-28 Facile Use of Silver Nanoparticles-Loaded Alumina/Silica in Nanofluid Formulations for Enhanced Catalytic Performance toward 4-Nitrophenol Reduction Mannu, Rashmi Karthikeyan, Vaithinathan Veerappa, Murugendrappa Malalkere Roy, Vellaisamy A. L. Gopalan, Anantha-Iyengar Saianand, Gopalan Sonar, Prashant Xu, Binrui Lee, Kwang-Pill Kim, Wha-Jung Lee, Dong-Eun Kannan, Venkatramanan Int J Environ Res Public Health Article The introduction of toxic chemicals into the environment can result in water pollution leading to the degradation of biodiversity as well as human health. This study presents a new approach of using metal oxides (Al(2)O(3) and SiO(2)) modified with a plasmonic metal (silver, Ag) nanoparticles (NPs)-based nanofluid (NF) formulation for environmental remediation purposes. Firstly, we prepared the Al(2)O(3) and SiO(2) NFs of different concentrations (0.2 to 2.0 weight %) by ultrasonic-assisted dispersion of Al(2)O(3) and SiO(2) NPs with water as the base fluid. The thermo-physical (viscosity, activation energy, and thermal conductivity), electrical (AC conductivity and dielectric constant) and physical (ultrasonic velocity, density, refractive index) and stability characteristics were comparatively evaluated. The Al(2)O(3) and SiO(2) NPs were then catalytically activated by loading silver NPs to obtain Al(2)O(3)/SiO(2)@Ag composite NPs. The catalytic reduction of 4-nitrophenol (4-NP) with Al(2)O(3)/SiO(2)@Ag based NFs was followed. The catalytic efficiency of Al(2)O(3)@Ag NF and SiO(2)@Ag NF, for the 4-NP catalysis, is compared. Based on the catalytic rate constant evaluation, the catalytic reduction efficiency for 4-NP is found to be superior for 2% weight Al(2)O(3)@Ag NF (92.9 × 10(−3) s(−1)) as compared to the SiO(2)@Ag NF (29.3 × 10(−3) s(−1)). Importantly, the enhanced catalytic efficiency of 2% weight Al(2)O(3)@Ag NF for 4-NP removal is much higher than other metal NPs based catalysts reported in the literature, signifying the importance of NF formulation-based catalysis. MDPI 2021-03-15 /pmc/articles/PMC7999000/ /pubmed/33803950 http://dx.doi.org/10.3390/ijerph18062994 Text en © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Mannu, Rashmi Karthikeyan, Vaithinathan Veerappa, Murugendrappa Malalkere Roy, Vellaisamy A. L. Gopalan, Anantha-Iyengar Saianand, Gopalan Sonar, Prashant Xu, Binrui Lee, Kwang-Pill Kim, Wha-Jung Lee, Dong-Eun Kannan, Venkatramanan Facile Use of Silver Nanoparticles-Loaded Alumina/Silica in Nanofluid Formulations for Enhanced Catalytic Performance toward 4-Nitrophenol Reduction |
title | Facile Use of Silver Nanoparticles-Loaded Alumina/Silica in Nanofluid Formulations for Enhanced Catalytic Performance toward 4-Nitrophenol Reduction |
title_full | Facile Use of Silver Nanoparticles-Loaded Alumina/Silica in Nanofluid Formulations for Enhanced Catalytic Performance toward 4-Nitrophenol Reduction |
title_fullStr | Facile Use of Silver Nanoparticles-Loaded Alumina/Silica in Nanofluid Formulations for Enhanced Catalytic Performance toward 4-Nitrophenol Reduction |
title_full_unstemmed | Facile Use of Silver Nanoparticles-Loaded Alumina/Silica in Nanofluid Formulations for Enhanced Catalytic Performance toward 4-Nitrophenol Reduction |
title_short | Facile Use of Silver Nanoparticles-Loaded Alumina/Silica in Nanofluid Formulations for Enhanced Catalytic Performance toward 4-Nitrophenol Reduction |
title_sort | facile use of silver nanoparticles-loaded alumina/silica in nanofluid formulations for enhanced catalytic performance toward 4-nitrophenol reduction |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7999000/ https://www.ncbi.nlm.nih.gov/pubmed/33803950 http://dx.doi.org/10.3390/ijerph18062994 |
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