Size Effect of Gold Nanoparticles in Catalytic Reduction of p-Nitrophenol with NaBH4
Gold nanoparticles (Au NPs) were prepared by reducing HAuCl4 with NaBH4. Their average particle sizes could be tuned in the range of 1.7 and 8.2 nm, by adjusting the amount of NaBH4 used during synthesis. The obtained Au NPs (colloids) were then loaded onto a commercial Al2O3 support to prepare Au/A...
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| Format: | Article |
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MDPI AG
2013-10-01
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| Series: | Molecules |
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| Online Access: | http://www.mdpi.com/1420-3049/18/10/12609 |
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| author | Shenghu Zhou Zhen Ma Chao Lin Dayin Hua Kai Tao |
| author_facet | Shenghu Zhou Zhen Ma Chao Lin Dayin Hua Kai Tao |
| author_sort | Shenghu Zhou |
| collection | DOAJ |
| description | Gold nanoparticles (Au NPs) were prepared by reducing HAuCl4 with NaBH4. Their average particle sizes could be tuned in the range of 1.7 and 8.2 nm, by adjusting the amount of NaBH4 used during synthesis. The obtained Au NPs (colloids) were then loaded onto a commercial Al2O3 support to prepare Au/Al2O3 catalysts with tunable Au particle sizes. An optimal pH value (5.9) of the Au colloid solution was found to be essential for loading Au NPs onto Al2O3 while avoiding the growth of Au NPs. Au NPs and Au/Al2O3 catalysts were tested in the reduction of p-nitrophenol with NaBH4. Interestingly, the catalytic activity depended on the size of Au NPs, being the highest when the average size was 3.4 nm. Relevant characterization by UV-Vis, TEM, and XRD was conducted. |
| first_indexed | 2024-12-22T02:55:54Z |
| format | Article |
| id | doaj.art-dcb0bf8d460f44bfbeb4c03d23a15c5f |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-12-22T02:55:54Z |
| publishDate | 2013-10-01 |
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| series | Molecules |
| spelling | doaj.art-dcb0bf8d460f44bfbeb4c03d23a15c5f2022-12-21T18:41:17ZengMDPI AGMolecules1420-30492013-10-011810126091262010.3390/molecules181012609Size Effect of Gold Nanoparticles in Catalytic Reduction of p-Nitrophenol with NaBH4Shenghu ZhouZhen MaChao LinDayin HuaKai TaoGold nanoparticles (Au NPs) were prepared by reducing HAuCl4 with NaBH4. Their average particle sizes could be tuned in the range of 1.7 and 8.2 nm, by adjusting the amount of NaBH4 used during synthesis. The obtained Au NPs (colloids) were then loaded onto a commercial Al2O3 support to prepare Au/Al2O3 catalysts with tunable Au particle sizes. An optimal pH value (5.9) of the Au colloid solution was found to be essential for loading Au NPs onto Al2O3 while avoiding the growth of Au NPs. Au NPs and Au/Al2O3 catalysts were tested in the reduction of p-nitrophenol with NaBH4. Interestingly, the catalytic activity depended on the size of Au NPs, being the highest when the average size was 3.4 nm. Relevant characterization by UV-Vis, TEM, and XRD was conducted.http://www.mdpi.com/1420-3049/18/10/12609gold catalystsaluminap-nitrophenolnanoparticlessize effect |
| spellingShingle | Shenghu Zhou Zhen Ma Chao Lin Dayin Hua Kai Tao Size Effect of Gold Nanoparticles in Catalytic Reduction of p-Nitrophenol with NaBH4 Molecules gold catalysts alumina p-nitrophenol nanoparticles size effect |
| title | Size Effect of Gold Nanoparticles in Catalytic Reduction of p-Nitrophenol with NaBH4 |
| title_full | Size Effect of Gold Nanoparticles in Catalytic Reduction of p-Nitrophenol with NaBH4 |
| title_fullStr | Size Effect of Gold Nanoparticles in Catalytic Reduction of p-Nitrophenol with NaBH4 |
| title_full_unstemmed | Size Effect of Gold Nanoparticles in Catalytic Reduction of p-Nitrophenol with NaBH4 |
| title_short | Size Effect of Gold Nanoparticles in Catalytic Reduction of p-Nitrophenol with NaBH4 |
| title_sort | size effect of gold nanoparticles in catalytic reduction of p nitrophenol with nabh4 |
| topic | gold catalysts alumina p-nitrophenol nanoparticles size effect |
| url | http://www.mdpi.com/1420-3049/18/10/12609 |
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