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

[1] NMR and NEXAFS Study of Various Graphite Fluorides [J].

Ahmad, Y. ;

Dubois, M. ;

Guerin, K. ;

Hamwi, A. ;

Fawal, Z. ;

Kharitonov, A. P. ;

Generalov, A. V. ;

Klyushin, A. Yu. ;

Simonov, K. A. ;

Vinogradov, N. A. ;

Zhdanov, I. A. ;

Preobrajenski, A. B. ;

Vinogradov, A. S. .

JOURNAL OF PHYSICAL CHEMISTRY C, 2013, 117 (26) :13564-13572

[2] CARBON-1S NEAR-EDGE-ABSORPTION FINE-STRUCTURE IN GRAPHITE [J].

BATSON, PE .

PHYSICAL REVIEW B, 1993, 48 (04) :2608-2610

[3] Covalent modification of exfoliated fluorographite with nitrogen functionalities [J].

Bosch-Navarro, Concha ;

Walker, Marc ;

Wilson, Neil R. ;

Rourke, Jonathan P. .

JOURNAL OF MATERIALS CHEMISTRY C, 2015, 3 (29) :7627-7631

[4] PI-ASTERISK AND SIGMA-ASTERISK EXCITONS IN C-1S ABSORPTION OF GRAPHITE [J].

BRUHWILER, PA ;

MAXWELL, AJ ;

PUGLIA, C ;

NILSSON, A ;

ANDERSON, S ;

MARTENSSON, N .

PHYSICAL REVIEW LETTERS, 1995, 74 (04) :614-617

[5] Structural evolution during annealing of thermally reduced graphene nanosheets for application in supercapacitors [J].

Chen, Cheng-Meng ;

Zhang, Qiang ;

Yang, Mang-Guo ;

Huang, Chun-Hsien ;

Yang, Yong-Gang ;

Wang, Mao-Zhang .

CARBON, 2012, 50 (10) :3572-3584

[6] Defect formation in graphene nanosheets by acid treatment: an x-ray absorption spectroscopy and density functional theory study [J].

Coleman, V. A. ;

Knut, R. ;

Karis, O. ;

Grennberg, H. ;

Jansson, U. ;

Quinlan, R. ;

Holloway, B. C. ;

Sanyal, B. ;

Eriksson, O. .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2008, 41 (06)

[7] Reactivity of Fluorographene: A Facile Way toward Graphene Derivatives [J].

Dubecky, Matus ;

Otyepkova, Eva ;

Lazar, Petr ;

Karlicky, Frantisek ;

Petr, Martin ;

Cepe, Klara ;

Banas, Pavel ;

Zboril, Radek ;

Otyepka, Michal .

JOURNAL OF PHYSICAL CHEMISTRY LETTERS, 2015, 6 (08) :1430-1434

[8] Two-Dimensional Fluorinated Graphene: Synthesis, Structures, Properties and Applications [J].

Feng, Wei ;

Long, Peng ;

Feng, Yiyu ;

Li, Yu .

ADVANCED SCIENCE, 2016, 3 (07)

[9] GRAPHITIC INTERLAYER STATES - A CARBON-K NEAR-EDGE X-RAY-ABSORPTION FINE-STRUCTURE STUDY [J].

FISCHER, DA ;

WENTZCOVITCH, RM ;

CARR, RG ;

CONTINENZA, A ;

FREEMAN, AJ .

PHYSICAL REVIEW B, 1991, 44 (03) :1427-1429

[10] Probing the Thermal Deoxygenation of Graphene Oxide Using High-Resolution In Situ X-ray-Based Spectroscopies [J].

Ganguly, Abhijit ;

Sharma, Surbhi ;

Papakonstantinou, Pagona ;

Hamilton, Jeremy .

JOURNAL OF PHYSICAL CHEMISTRY C, 2011, 115 (34) :17009-17019

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