Preparation of graphite derivatives by selective reduction of graphite oxide and isocyanate functionalization

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F16%3A00464022" target="_blank" >RIV/61389013:_____/16:00464022 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.matchemphys.2016.07.028" target="_blank" >http://dx.doi.org/10.1016/j.matchemphys.2016.07.028</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.matchemphys.2016.07.028" target="_blank" >10.1016/j.matchemphys.2016.07.028</a>

Result language

angličtina

Original language name

Preparation of graphite derivatives by selective reduction of graphite oxide and isocyanate functionalization

Original language description

Heavily oxidized and ordered graphene nanoplatelets were produced from natural graphite by oxidation using a mixture of phosphoric acid, sulphuric acid, and potassium permanganate (Marcano's method). The atomic percentage of oxygen in the graphite oxide produced was more than 30% confirmed by XPS studies. The graphite oxide produced had intact basal planes and remains in a layered structure with interlayer distance of 0.8 nm, analyzed by WAXS. The graphite oxide was treated with 4,4-methylenebis(phenyl isocyanate) (MDI) to produce grafted isocyanate functionalization. Introduction of these bulky functional groups widens the interlayer distance to 1.3 nm. In addition, two reduction methods, namely benzyl alcohol mediated reduction and thermal reduction were carried out on isocyanate modified and unmodified graphite oxides and compared to each other. The decrease in the oxygen content and the sp3 defect-repair were studied with XPS and RAMAN spectroscopy. Compared to the thermal reduction process, which is connected with large material loss, the benzyl alcohol mediated reduction process is highly effective in defect repair. This resulted in an increase of conductivity of at least 9 orders of magnitude compared to the graphite oxide.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CD - Macromolecular chemistry

OECD FORD branch

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Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Materials Chemistry and Physics

ISSN

0254-0584

e-ISSN

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Volume of the periodical

182

Issue of the periodical within the volume

1 October

Country of publishing house

CH - SWITZERLAND

Number of pages

9

Pages from-to

237-245

UT code for WoS article

000383524900030

EID of the result in the Scopus database

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