第 28 卷第 2 期
高 校 化 学 工 程 学 报
No.2
Vol.28
2014 年 4 月
Journal of Chemical Engineering of Chinese Universities
Apr
.
2014
文章编号:1003-9015(2014)02-0258-06
维他命C绿色还原制备石墨烯/Pt复合材料
袁文辉
1
, 顾叶剑
1
, 李 莉
2
(1. 华南理工大学 化学与化工学院, 广东 广州 510640;
2. 华南理工大学 环境科学与工程学院, 广东 广州 510640)
摘
要:以氧化石墨和氯铂酸作为初始反应物,采用环境友好型还原剂
Vitamin C
,绿色还原制备了石墨烯
/Pt
(GNS/Pt)
纳米复合材料。采用
X
射线衍射
(XRD)
、扫描电子显微镜
(SEM)
、透射电子显微镜
(TEM)
、傅里叶变换红
外
(FT-IR)
光谱、
X
射线光电子能谱
(XPS)
和拉曼光谱
(RS)
等分析手段对石墨烯
/Pt
样品进行了表征。结果表明:氧化
石墨还原彻底,铂离子和氧化石墨在反应过程中同时被
Vitamin C
还原,样品的无序度增加,平均晶粒尺寸逐渐减
小,
Pt
粒子的大小和分布受氯铂酸用量的影响,在一定的铂离子浓度下,粒径为
7
~
10 nm
的铂纳米粒子均匀分布
于石墨烯片层之间,有效地减少了石墨烯片层间的团聚现象。此外,
GNS/Pt
可稳定分散于水、
N, N-
二甲基甲酰胺
(DMF)
、
N-
甲基吡咯烷酮
(NMP)
等多种溶剂中,且导电率高达
12630 S
⋅
m
−
1
。
关键词:石墨烯;石墨烯
/Pt
;复合材料;维他命
C
;环境友好
中图分类号:
TB33
文献标识码:
A DOI
:
10.3969/j.issn.1003-9015.2014.02.010
Green Synthesis of Graphene/Pt Nanocomposites with Vitamin C
YUAN Wen-hui
1
, GU Ye-jian
1
, LI Li
2
(1. School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou
510640, China; 2. College of Environmental Science and Engineering, South China University of
Technology, Guangzhou 510640, China)
Abstract: Graphene/Pt (GNS/Pt) nanocomposites were fabricated via a green and facile method, which
employed graphene oxide (GO) as a precursor of graphene, H
2
PtCl
6
as a precursor of Pt nanoparticles, and
Vitamin C as an environmentally friendly reducing agent. The as-prepared GNS/Pt was characterized by
X-ray diffraction (XRD), Scanning electron microscopy (SEM), Transmission electron microscopy (TEM),
Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS) and Raman
Spectra (RS). The results indicate that graphite oxide is completely reduced to graphene, and platinum ions
are reduced by Vitamin C simultaneously. The average grain size of the sample decreases gradually and the
degree of sample disorder increases. The amount of H
2
PtCl
6
influences the size range of the Pt nanoparticles,
and face-to-face aggregation of graphene sheets is arrested by 7~10 nm Pt crystallites on the graphene
surface under a certain concentration of platinum ions. In addition, stable suspensions of GNS/Pt can be
prepared in some solvents, such as water, N,N-dimethylformamide (DMF) or N-methyl-2-pyrrolidone (NMP)
and the electrical conductivity of the GNS/Pt film is up to 12630 S⋅m
−1
.
Key words: graphene; graphene/Pt; composites; Vitamin C; environment-friendly
1 前 言
单原子厚的二维材料—石墨烯由于其高的热导率、优越的机械物理性能、易改性的表面化学
[1,2]
等特性,被广泛应用于电池、传感器、超级电容器、燃料电池、氢气存储等应用研究领域
[3~7]
。但是,
收稿日期:2012-08-27;修订日期:2012-12-10。
基金项目:国家自然科学基金(20976057);广东省绿色精细化学品工程技术研究中心开放基金资助。
作者简介:袁文辉(1969−),男,江苏扬中人,华南理工大学副教授,博士。 通讯联系人:袁文辉,E-mail
cewhyuan@scut.edu.cn