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一种采用锌粉还原制备高电导率的还原石墨烯的绿色﹑柔和的合成方法
耿志刚,张光辉,林岳,于欣欣,任文贞,吴昱昆,潘楠*,王晓平
作者单位E-mail
耿志刚 中国科学技术大学合肥微尺度物质科学国家实验室(筹)合肥230026  
张光辉 中国科学技术大学物理系合肥230026  
林岳 中国科学技术大学合肥微尺度物质科学国家实验室(筹)合肥230026  
于欣欣 中国科学技术大学合肥微尺度物质科学国家实验室(筹)合肥230026  
任文贞 中国科学技术大学物理系合肥230026  
吴昱昆 中国科学技术大学物理系合肥230026  
潘楠* 中国科学技术大学物理系合肥230026 npan@mail.ustc.edu.cn 
王晓平 中国科学技术大学合肥微尺度物质科学国家实验室(筹)合肥230026中国科学技术大学物理系合肥230026  
摘要:
报道了一种在室温下,采用锌粉还原氧化石墨烯制备还原石墨烯的简单﹑绿色的合成途径.随着反应时间的变化,由氧化石墨烯被还原到还原石墨烯的过程分别可通过XRD、UV-Vis以及Raman光谱进行表征,同时通过XPS的结果可知石墨烯的碳氧比由原先的1.67增加到13.7,其电导率高达26.900±2.2 kS/m.在厚度大约为20 nm、波长为450~1500 nm时,其透过率超过70%.
关键词:  氧化石墨,还原,锌粉
DOI:10.1088/1674-0068/25/04/494-500
分类号:
基金项目:
A Green and Mild Approach of Synthesis of Highly-Conductive Graphene Film by Zn Reduction of Exfoliated Graphite Oxide
Zhi-gang Geng,Guang-hui Zhang,Yue Lin,Xin-xin Yu,Wen-zhen Ren,Yu-kun Wu,Nan Pan*,Xiao-ping Wang
Abstract:
We report a simple and green approach to synthesize reduced graphene oxide (RGO) nanosheets at room temperature based on Zn reduction of exfoliated GO. The evolution of GO to RGO has been characterized by X-ray diffraction, UV-Vis absorption spectroscopy and Raman spectroscopy. The results of X-ray photoelectron spectroscopy reveal that the atomic ratio of carbon to oxygen in the RGO can be tuned from 1.67 to 13.7 through controlling the reduction time. Moreover, the conductivity of the RGO is measured to be 26.9±2.2 kS/m, much larger than those previously obtained by chemical reduction through other reducing agents. More importantly, the resistance of the RGO film with 20 nm thick- ness can be as low as 2 kΩ/square, while a high transparency over 70% within a broad spectral range from 0.45 μm to 1.50 μm can be retained. The proposed method is low-cost, eco-friendly and highly-effcient, the as-prepared thinner RGO films are useful in a variety of potential application fields such as optoelectronics, photovoltaics and electrochemistry by serving as an ultralight, flexible and transparent electrode material.
Key words:  Graphene oxide, Reduction, Zn powder