School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore.
Nanoscale. 2012 Apr 7;4(7):2478-83. doi: 10.1039/c2nr11992g. Epub 2012 Mar 2.
A bifunctional Fe(3)O(4)-Pt/reduced graphene oxide (rGO) composite, i.e. Fe(3)O(4) nanoparticles (4.8 nm in size) and Pt nanoparticles (5 nm in size) loaded on a rGO surface, has been synthesized. It shows great catalytic performance for the reduction of methylene blue. Recycling of the composite can be achieved by simply applying an external magnetic field. In addition, the Fe(3)O(4)-Pt/rGO composite exhibits a higher catalytic activity and selectivity for aqueous-phase aerobic oxidation of benzyl alcohol than does the FeO(x)-Pt on carbon nanotubes (i.e. FeO(x)-Pt/CNT composite). Moreover, the approach for the synthesis of Fe(3)O(4)-Pt/rGO composite is simple, and can be widely employed to produce other rGO-based composites with special properties. Our work indicates that the rGO-based bifunctional composite has great potential for practical applications in various fields, such as catalytic reaction, electrochemical sensing, clean energy, etc.
一种双功能 Fe(3)O(4)-Pt/还原氧化石墨烯（rGO）复合材料，即负载在 rGO 表面上的 Fe(3)O(4)纳米粒子（4.8nm 大小）和 Pt 纳米粒子（5nm 大小），已经被合成出来。它在还原亚甲基蓝方面表现出了优异的催化性能。通过简单地施加外部磁场，可以实现复合材料的回收利用。此外，Fe(3)O(4)-Pt/rGO 复合材料在水相有氧氧化苄醇方面表现出比负载在碳纳米管上的 FeO(x)-Pt（即 FeO(x)-Pt/CNT 复合材料）更高的催化活性和选择性。此外，Fe(3)O(4)-Pt/rGO 复合材料的合成方法简单，可广泛应用于制备具有特殊性能的其他 rGO 基复合材料。我们的工作表明，基于 rGO 的双功能复合材料在催化反应、电化学传感、清洁能源等各个领域的实际应用中具有巨大的潜力。
