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Methanobactin-Mediated Synthesis of Gold Nanoparticles Supported over Al(2)O(3) toward an Efficient Catalyst for Glucose Oxidation
Methanobactin (Mb) is a copper-binding peptide that appears to function as an agent for copper sequestration and uptake in methanotrophs. Mb can also bind and reduce Au(III) to Au(0). In this paper, Au/Al(2)O(3) catalysts prepared by a novel incipient wetness-Mb-mediated bioreduction method were use...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2014
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4284666/ https://www.ncbi.nlm.nih.gov/pubmed/25429424 http://dx.doi.org/10.3390/ijms151221603 |
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author | Xin, Jia-Ying Lin, Kai Wang, Yan Xia, Chun-Gu |
author_facet | Xin, Jia-Ying Lin, Kai Wang, Yan Xia, Chun-Gu |
author_sort | Xin, Jia-Ying |
collection | PubMed |
description | Methanobactin (Mb) is a copper-binding peptide that appears to function as an agent for copper sequestration and uptake in methanotrophs. Mb can also bind and reduce Au(III) to Au(0). In this paper, Au/Al(2)O(3) catalysts prepared by a novel incipient wetness-Mb-mediated bioreduction method were used for glucose oxidation. The catalysts were characterized, and the analysis revealed that very small gold nanoparticles with a particle size <4 nm were prepared by the incipient wetness-Mb-mediated bioreduction method, even at 1.0% Au loading (w/w). The influence of Au loading, calcination temperature and calcination time on the specific activity of Au/Al(2)O(3) catalysts was systematically investigated. Experimental results showed that decomposing the Mb molecules properly by calcinations can enhance the specific activity of Au/Al(2)O(3) catalysts, though they acted as reductant and protective agents during the catalyst preparation. Au/Al(2)O(3) catalysts synthesized by the method exhibited optimum specific activity under operational synthesis conditions of Au loading of 1.0 wt % and calcined at 450 °C for 2 h. The catalysts were reused eight times, without a significant decrease in specific activity. To our knowledge, this is the first attempt at the preparation of Au/Al(2)O(3) catalysts by Mb-mediated in situ synthesis of gold nanoparticles. |
format | Online Article Text |
id | pubmed-4284666 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2014 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-42846662015-01-21 Methanobactin-Mediated Synthesis of Gold Nanoparticles Supported over Al(2)O(3) toward an Efficient Catalyst for Glucose Oxidation Xin, Jia-Ying Lin, Kai Wang, Yan Xia, Chun-Gu Int J Mol Sci Article Methanobactin (Mb) is a copper-binding peptide that appears to function as an agent for copper sequestration and uptake in methanotrophs. Mb can also bind and reduce Au(III) to Au(0). In this paper, Au/Al(2)O(3) catalysts prepared by a novel incipient wetness-Mb-mediated bioreduction method were used for glucose oxidation. The catalysts were characterized, and the analysis revealed that very small gold nanoparticles with a particle size <4 nm were prepared by the incipient wetness-Mb-mediated bioreduction method, even at 1.0% Au loading (w/w). The influence of Au loading, calcination temperature and calcination time on the specific activity of Au/Al(2)O(3) catalysts was systematically investigated. Experimental results showed that decomposing the Mb molecules properly by calcinations can enhance the specific activity of Au/Al(2)O(3) catalysts, though they acted as reductant and protective agents during the catalyst preparation. Au/Al(2)O(3) catalysts synthesized by the method exhibited optimum specific activity under operational synthesis conditions of Au loading of 1.0 wt % and calcined at 450 °C for 2 h. The catalysts were reused eight times, without a significant decrease in specific activity. To our knowledge, this is the first attempt at the preparation of Au/Al(2)O(3) catalysts by Mb-mediated in situ synthesis of gold nanoparticles. MDPI 2014-11-25 /pmc/articles/PMC4284666/ /pubmed/25429424 http://dx.doi.org/10.3390/ijms151221603 Text en © 2014 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 license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Xin, Jia-Ying Lin, Kai Wang, Yan Xia, Chun-Gu Methanobactin-Mediated Synthesis of Gold Nanoparticles Supported over Al(2)O(3) toward an Efficient Catalyst for Glucose Oxidation |
title | Methanobactin-Mediated Synthesis of Gold Nanoparticles Supported over Al(2)O(3) toward an Efficient Catalyst for Glucose Oxidation |
title_full | Methanobactin-Mediated Synthesis of Gold Nanoparticles Supported over Al(2)O(3) toward an Efficient Catalyst for Glucose Oxidation |
title_fullStr | Methanobactin-Mediated Synthesis of Gold Nanoparticles Supported over Al(2)O(3) toward an Efficient Catalyst for Glucose Oxidation |
title_full_unstemmed | Methanobactin-Mediated Synthesis of Gold Nanoparticles Supported over Al(2)O(3) toward an Efficient Catalyst for Glucose Oxidation |
title_short | Methanobactin-Mediated Synthesis of Gold Nanoparticles Supported over Al(2)O(3) toward an Efficient Catalyst for Glucose Oxidation |
title_sort | methanobactin-mediated synthesis of gold nanoparticles supported over al(2)o(3) toward an efficient catalyst for glucose oxidation |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4284666/ https://www.ncbi.nlm.nih.gov/pubmed/25429424 http://dx.doi.org/10.3390/ijms151221603 |
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