Polyphenol-Reduced Graphene Oxide: Mechanism and Derivatization

被引：104

作者：

Liao, Ruijuan ^{[1
]}

Tang, Zhenghai ^{[1
]}

Lei, Yanda ^{[1
]}

Guo, Baochun ^{[1
,2
]}

机构：

[1] S China Univ Technol, Dept Polymer Mat & Engn, Guangzhou 510640, Peoples R China

[2] S China Univ Technol, State Key Lab Pulp & Paper Engn, Guangzhou 510640, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2011年 / 115卷 / 42期

基金：

中国国家自然科学基金;

关键词：

GREEN TEA CATECHINS; (-)-EPIGALLOCATECHIN GALLATE; FACILE SYNTHESIS; GRAPHITE OXIDE; VITAMIN-C; REDUCTION; CHEMISTRY; IDENTIFICATION; HYDRAZINE; ROUTE;

D O I：

10.1021/jp2068683

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：

In this work, tea polyphenols (TPs) were employed as an environmentally friendly and highly efficient reducer and stabilizer for graphene oxide (GO). The results from XPS, Raman, and conductivity studies of reduced graphene indicated the efficient deoxidization of GO. The adsorption of oxidized TPs onto graphene supplies steric hindrance among graphene sheets to keep them individually dispersed in water and some solvents. To investigate the reduction mechanism, epigallocatechin gallate (EGCG), the primary component of TPs, was used as a model. Characterization by H-1 NMR and FTIR spectroscopies indicated that the gallic units in EGCG were converted to galloyl-derived orthoquinone and the flavonoid structure survived during the reduction. To further enhance the organosolubility of the resultant graphene, derivatization of the graphene was conducted by galloyl-derived orthoquinone-thiol chemistry. The successful derivatization was found to greatly improve the organosolubility of graphene in solvents with low boiling points.

引用

页码：20740 / 20746

页数：7

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