Biogenic Platinum Nanoparticles’ Production by Extremely Acidophilic Fe(III)-Reducing Bacteria
Platinum nanoparticles (Pt(0)NPs) are expected to play a vital role in future technologies as high-performance catalysts. The microbiological route for Pt(0)NPs’ production is considered a greener and simpler alternative to conventional methods. In order to explore the potential utility of extreme a...
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MDPI AG
2021-10-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/11/11/1175 |
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| author | Takahiro Matsumoto Idol Phann Naoko Okibe |
| author_facet | Takahiro Matsumoto Idol Phann Naoko Okibe |
| author_sort | Takahiro Matsumoto |
| collection | DOAJ |
| description | Platinum nanoparticles (Pt(0)NPs) are expected to play a vital role in future technologies as high-performance catalysts. The microbiological route for Pt(0)NPs’ production is considered a greener and simpler alternative to conventional methods. In order to explore the potential utility of extreme acidophiles, Fe(III)-reducing acidophilic bacteria, <i>Acidocella aromatica</i> and <i>Acidiphilium crytpum,</i> were tested for the production of bio-Pt(0)NPs from an acidic solution. Bio-Pt(0)NPs were successfully formed via a simple one-step reaction with the difference in the size and location between the two strains. Intact enzymatic activity was essential to exhibit the site for Pt(0) crystal nucleation, which enables the formation of well-dispersed, fine bio-Pt(0)NPs. Active <i>Ac. aromatica</i> cells produced the finest bio-Pt(0)NPs of mean and median size of 16.1 and 8.5 nm, respectively. The catalytic activity of bio-Pt(0)NPs was assessed using the Cr(VI) reduction reaction, which was shown to be in a negative linear correlation with the mean particle size under the conditions tested. This is the first study reporting the recruitment of acidophilic extremophiles for the production of Pt(0)NPs. Acidophilic extremophiles often inhabit metal-rich acidic liquors in nature and are expected to become the promising tool for metal nanotechnology. |
| first_indexed | 2024-03-10T05:15:23Z |
| format | Article |
| id | doaj.art-ff5f6dc5c2ce485aa3bc3e77e5bbd2c8 |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-10T05:15:23Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-ff5f6dc5c2ce485aa3bc3e77e5bbd2c82023-11-23T00:31:24ZengMDPI AGMinerals2075-163X2021-10-011111117510.3390/min11111175Biogenic Platinum Nanoparticles’ Production by Extremely Acidophilic Fe(III)-Reducing BacteriaTakahiro Matsumoto0Idol Phann1Naoko Okibe2Department of Earth Resources Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, JapanDepartment of Earth Resources Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, JapanDepartment of Earth Resources Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, JapanPlatinum nanoparticles (Pt(0)NPs) are expected to play a vital role in future technologies as high-performance catalysts. The microbiological route for Pt(0)NPs’ production is considered a greener and simpler alternative to conventional methods. In order to explore the potential utility of extreme acidophiles, Fe(III)-reducing acidophilic bacteria, <i>Acidocella aromatica</i> and <i>Acidiphilium crytpum,</i> were tested for the production of bio-Pt(0)NPs from an acidic solution. Bio-Pt(0)NPs were successfully formed via a simple one-step reaction with the difference in the size and location between the two strains. Intact enzymatic activity was essential to exhibit the site for Pt(0) crystal nucleation, which enables the formation of well-dispersed, fine bio-Pt(0)NPs. Active <i>Ac. aromatica</i> cells produced the finest bio-Pt(0)NPs of mean and median size of 16.1 and 8.5 nm, respectively. The catalytic activity of bio-Pt(0)NPs was assessed using the Cr(VI) reduction reaction, which was shown to be in a negative linear correlation with the mean particle size under the conditions tested. This is the first study reporting the recruitment of acidophilic extremophiles for the production of Pt(0)NPs. Acidophilic extremophiles often inhabit metal-rich acidic liquors in nature and are expected to become the promising tool for metal nanotechnology.https://www.mdpi.com/2075-163X/11/11/1175platinumnanoparticlesextreme acidophilesFe(III)-reducing bacteria<i>Acidocella</i> sp.<i>Acidiphilium</i> sp. |
| spellingShingle | Takahiro Matsumoto Idol Phann Naoko Okibe Biogenic Platinum Nanoparticles’ Production by Extremely Acidophilic Fe(III)-Reducing Bacteria Minerals platinum nanoparticles extreme acidophiles Fe(III)-reducing bacteria <i>Acidocella</i> sp. <i>Acidiphilium</i> sp. |
| title | Biogenic Platinum Nanoparticles’ Production by Extremely Acidophilic Fe(III)-Reducing Bacteria |
| title_full | Biogenic Platinum Nanoparticles’ Production by Extremely Acidophilic Fe(III)-Reducing Bacteria |
| title_fullStr | Biogenic Platinum Nanoparticles’ Production by Extremely Acidophilic Fe(III)-Reducing Bacteria |
| title_full_unstemmed | Biogenic Platinum Nanoparticles’ Production by Extremely Acidophilic Fe(III)-Reducing Bacteria |
| title_short | Biogenic Platinum Nanoparticles’ Production by Extremely Acidophilic Fe(III)-Reducing Bacteria |
| title_sort | biogenic platinum nanoparticles production by extremely acidophilic fe iii reducing bacteria |
| topic | platinum nanoparticles extreme acidophiles Fe(III)-reducing bacteria <i>Acidocella</i> sp. <i>Acidiphilium</i> sp. |
| url | https://www.mdpi.com/2075-163X/11/11/1175 |
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