School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin 150001, China.
ACS Nano. 2011 Mar 22;5(3):1785-91. doi: 10.1021/nn102467s. Epub 2011 Mar 1.
Here we report that poly(diallyldimethylammonium chloride) (PDDA) acts as both a reducing agent and a stabilizer to prepare soluble graphene nanosheets from graphite oxide. The results of transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, atomic force microscopy, and Fourier transform infrared indicated that graphite oxide was successfully reduced to graphene nanosheets which exhibited single-layer structure and high dispersion in various solvents. The reaction mechanism for PDDA-induced reduction of exfoliated graphite oxide was proposed. Furthermore, PDDA facilitated the in situ growth of highly dispersed Pt nanoparticles on the surface of graphene nanosheets to form Pt/graphene nanocomposites, which exhibited excellent catalytic activity toward formic acid oxidation. This work presents a facile and environmentally friendly approach to the synthesis of graphene nanosheets and opens up a new possibility for preparing graphene and graphene-based nanomaterials for large-scale applications.
我们在此报告，聚二烯丙基二甲基氯化铵（PDDA）可同时作为还原剂和稳定剂，将氧化石墨还原为可溶性石墨烯纳米片。透射电子显微镜、X 射线衍射、X 射线光电子能谱、原子力显微镜和傅里叶变换红外光谱的结果表明，氧化石墨成功地被还原为具有单层结构和在各种溶剂中高分散性的石墨烯纳米片。提出了 PDDA 诱导剥离氧化石墨还原的反应机制。此外，PDDA 促进了高度分散的 Pt 纳米粒子在石墨烯纳米片表面的原位生长，形成 Pt/石墨烯纳米复合材料，该复合材料对甲酸氧化表现出优异的催化活性。这项工作提供了一种简便、环保的合成石墨烯纳米片的方法，为大规模应用制备石墨烯和基于石墨烯的纳米材料开辟了新的可能性。
