Metal nanoparticles supported graphene oxide 3D porous monoliths and their excellent catalytic activity

详细信息	查看全文 | 推荐本文 |

• 作者：Yongqiang He^a ; ^b ; Nana Zhang^b ; Qiaojuan Gong^a ; Zhiliang Li^b ; Jianping Gao^b ; ^{jianpinggaols@126.com} ; Haixia Qiu^b ; ^{qhx@tju.edu.cn}
• 关键词：Composite materials ; Nanostructures ; Electron microscopy ; Chemical synthesis
• 刊名：Materials Chemistry and Physics
• 出版年：2012
• 期刊代码：58_02540584
• 类别：ms
• 出版时间：15 June, 2012
• 卷：134
• 期：2-3
• 页码：585-589
• 文件大小：1491 K

摘要

Graphene oxide (GO) and reduced graphene oxide (RGO) 3D porous monoliths were prepared using a simple and green method, unidirectional freeze-drying method. Gold or silver nanoparticles were deposited on the GO nanosheets to form Au/GO and Ag/GO nanocomposites under the reducing action of GO without using any reducing agent or surfactant. The Au or Ag nanoparticles loaded GO 3D porous monoliths (Au/GO or Ag/GO 3D porous monoliths) prepared from Au/GO and Ag/GO nanocomposites by unidirectional freeze-drying method had an order (unidirectional) porous structure and high porosity. The Au/GO or Au/RGO 3D porous monoliths not only had high catalytic activity in the reduction of 4-nitrophenol and Suzuki-Miyaura coupling reaction, but also showed good recyclability.