Green preparation of reduced graphene oxide using a natural reducing agent

被引：61
作者：
Chong, Soon Weng [1 ]
Lai, Chin Wei [1 ]
Hamid, Sharifah Bee Abdul [1 ]
机构：
[1] UM, Nanotechnol & Catalysis Res Ctr NANOCAT, Kuala Lumpur 50603, Malaysia
来源：
CERAMICS INTERNATIONAL | 2015年 / 41卷 / 08期
关键词：
Natural reducing agent; Chemical reduction; One-pot preparation; SENSITIZED SOLAR-CELLS; EPITAXIAL GRAPHENE; GRAPHITE;
D O I：
10.1016/j.ceramint.2015.04.008
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
simple and efficient method was introduced for the high-conversion preparation of graphene oxide (GO) from large graphite flakes (average flake size= 100 mu m) using a simplified Hummer's method. Natural reducing agents such as lemon juice and vinegar were compared with hydrazine (N2H4) as potential reducing agents. Graphene was prepared by chemical reduction of GO because this method was low cost and could be used for large-scale graphene production. This one-pot graphene preparation was performed at room temperature. Different degrees of oxidation of graphite flakes were obtained by stirring graphite in a mixture of sulfuric acid and potassium permanganate at different oxidation times, and highly exfoliated GO sheets were produced. GO was subsequently reduced effectively by lemon juice, a new, green, and potential reducing agent with pH 2.3. This reduced GO exhibited a high electrical conductance of 24.6 mu S attributed to its higher C/O ratio (approximate to 8:2) compared with other samples. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
引用
收藏
页码：9505 / 9513
页数：9
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