Structural evolution of fluorinated graphene upon molten-alkali treatment probed by X-ray absorption near-edge structure spectroscopy

被引：15

作者：

Liang, Xianqing ^{[1
,2
]}

Pan, Deyou ^{[1
]}

Lao, Ming ^{[1
]}

Liang, Shuiying ^{[1
]}

Huang, Dan ^{[1
,2
]}

Zhou, Wenzheng ^{[1
,2
]}

Guo, Jin ^{[1
,2
]}

机构：

[1] Guangxi Univ, Coll Phys Sci & Technol, Guangxi Coll & Univ Key Lab Novel Energy Mat & Re, Nanning 530004, Peoples R China

[2] Guilin Univ Elect Technol, Guangxi Collaborat Innovat Ctr Struct & Property, Sch Mat Sci & Engn, Guilin 541004, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2017年 / 404卷

基金：

中国国家自然科学基金;

关键词：

Fluorinated graphene; Molten alkali; Surface chemistry; Electronic structure; XANES; FINE-STRUCTURE; SOLUBLE GRAPHENE; INNER-SHELL; OXIDE; GRAPHITE; CARBON; REACTIVITY; NANOSHEETS; FLUORIDE; NEXAFS;

D O I：

10.1016/j.apsusc.2017.01.190

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：

The structural evolution of fluorinated graphene (FG) nanosheets upon molten-alkali treatment has been systematically investigated utilizing X-ray absorption near-edge structure (XANES) spectroscopy. It is found that the hydroxyl groups can progressively displace fluorine atoms to form covalent bonds to the graphene sheets under designed molten-alkali condition. The XANES spectra also reveal the formation of epoxide groups through intramolecular dehydration of neighbouring hydroxyl groups after substitution reaction. At high alkali-FG weight ratio, the restoration of the pi-conjugated structure in graphene sheets can be observed due to the gradual decomposition of epoxide groups. Our experimental results indicate that the surface chemistry and electronic structure of hydroxyl-functionalized FG (HFG) can be readily tuned by varying the ratio of reactants. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：1 / 6

页数：6

共 36 条

[21] Soft X-ray Absorption Spectroscopy Studies of the Electronic Structure Recovery of Graphene Oxide upon Chemical Defunctionalization [J].