Targeted thiolation of graphene oxide and its utilization as precursor for graphene/silver nanoparticles composites

被引：78

作者：

Orth, Elisa S. ^{[1
]}

Fonsaca, Jessica E. S. ^{[1
]}

Domingues, Sergio H. ^{[1
]}

Mehl, Hiany ^{[1
]}

Oliveira, Marcella M. ^{[2
]}

Zarbin, Aldo J. G. ^{[1
]}

机构：

[1] Univ Fed Parana UFPR, Dept Chem, BR-81531990 Curitiba, Parana, Brazil

[2] Univ Tecnol Fed Parana UTFPR, Dept Biol & Chem, BR-81280340 Curitiba, Parana, Brazil

来源：

CARBON | 2013年 / 61卷

关键词：

ENHANCED RAMAN-SCATTERING; CHEMICAL FUNCTIONALIZATION; CYSTEAMINE MONOLAYERS; SILVER NANOPARTICLES; CARBON NANOTUBES; FACILE SYNTHESIS; SHEETS; SPECTROSCOPY; NANOMATERIALS; REDUCTION;

D O I：

10.1016/j.carbon.2013.05.032

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We describe a route to graphene/silver nanoparticles composites based on the targeted chemical thiolation of graphene oxide (GO), followed by a chemical reduction in the presence of Ag+ cations. The carboxylic groups on the GO surface were selectively modified with cysteamine (CA) through amide bonds, and the free thiol groups remaining in CA were further used as capping agent for silver nanoparticles, preventing particle aggregation in the preparation of graphene/silver nanoparticles composites. Characterizations were carried out by infrared and Raman spectroscopy, thermogravimetric analysis, X-ray diffraction and transmission electron microscopy, confirming both the targeted chemical modification and the composite formation. Results show that increasing functionalization of GO with CA give smaller and more homogenous silver nanoparticles, with mean diameter of similar to 5 nm. Therefore, the modified GO has potential in size controlling the silver nanoparticles, essential for the design of novel composites with promising applications in catalysis, surface enhanced Raman scattering and bactericide activity. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：543 / 550

页数：8

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