Increasing reaction time in Hummers' method towards well exfoliated graphene oxide of low oxidation degree

被引：28

作者：

Aixart, Jordi ^{[1
,2
]}

Diaz, Francesc ^{[1
]}

Llorca, Jordi ^{[3
,4
]}

Rosell-Llompart, Joan ^{[2
,5
]}

机构：

[1] Univ Rovira & Virgili URV, Fis & Cristallog Mat & Nanomat FiCMA FiCNA, Marcel Li Domingo 1, Tarragona 43007, Spain

[2] Univ Rovira & Virgili, Dept Chem Engn, Av Paisos Catalans 26, Tarragona 43007, Spain

[3] Univ Politecn Cataluna, EEBE, Dept Chem Engn, Inst Energy Technol, Eduard Maristany 10-14, Barcelona 08019, Spain

[4] Univ Politecn Cataluna, EEBE, Barcelona Res Ctr Multiscale Sci & Engn, Eduard Maristany 10-14, Barcelona 08019, Spain

[5] Catalan Inst Res & Adv Studies ICREA, Pg Lluis Co 23, Barcelona 08010, Spain

来源：

CERAMICS INTERNATIONAL | 2021年 / 47卷 / 15期

关键词：

Graphene oxide; Hummers' method; Graphite oxide; Exfoliation; GRAPHITE OXIDE; MECHANICAL-PROPERTIES; AQUEOUS DISPERSIONS; SHEETS; WATER; REDUCTION; EFFICIENT; KINETICS; ORIGIN; SIZE;

D O I：

10.1016/j.ceramint.2021.04.235

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Graphene oxide (GO) has been synthesized by a modification of the Hummers' method using different times of reaction of 30, 60, 120, 300 and 540 min while maintaining all other parameters constant and avoiding aggressive posttreatments such as sonication and strong agitation that are known to affect the chemical and structural integrity of the flakes. The morphology of the obtained flakes has been investigated by optical and electron microscopies. Chemical properties of the GOs have been determined by TGA, XRD, Raman, XPS and EDS. The degree of exfoliation strongly increased with the reaction time, while no significant differences were found between the GOs in terms of their chemistry. Thus, we demonstrate that increasing reaction time is enough for the obtention of large-sized and well-exfoliated GO flakes, while maintaining a chemical richness that would be hindered by aggressive exfoliation techniques.

引用

页码：22130 / 22137

页数：8

共 51 条

[1] XPS and structural studies of high quality graphene oxide and reduced graphene oxide prepared by different chemical oxidation methods [J].