不同氧化机制对两种石墨插层硫酸氢石墨剥离的影响

IF 0.5 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materia-rio De Janeiro Pub Date : 2021-06-04 DOI:10.1590/S1517-707620210002.1293

J. A. Martinez, Miguel Sanchez Junior, Augusto Nobre Golçalves, R. Orrego, O. Florêncio

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引用次数: 1

摘要

在粉末和片状两种不同类型的石墨中，试验了三种不同的工艺合成剥离石墨插层化合物。每个石墨在相同的实验条件下被氧化(超声、中和、过滤和干燥)，但使用三种不同的辅助氧化剂(H2O2、HNO3和KClO3)，之前与H2SO4混合。用x射线衍射、拉曼光谱和扫描电镜对合成的样品进行了表征。氧化样品的拉曼光谱分析与几层石墨烯的拉曼光谱分析相对应。用H2SO4/HNO3处理后，原粉状的石墨样品出现了更强的分层和剥落现象。关键词:石墨，石墨烯，拉曼光谱，插层。

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Influence of different oxidation mechanisms on the exfoliation of intercalated graphite bisulfate using two types of graphite

Three different processes for the synthetization of exfoliated graphite intercalation compound have been tested in two different type of graphite, one in powder form and the other one as flakes. Each graphite was oxidized applying the same experimental conditions (sonification, neutralization, filtering and drying) but using three different auxiliary oxidizers (H2O2, HNO3 and KClO3) previously mixed with H2SO4. The resulting synthesized samples were characterized by X-ray diffraction, Raman spectroscopy and scanning electron microscopy. The Raman spectra analysis of the oxidized samples correspond to that of a graphene of few layers. Stronger delamination and exfoliation were observed in the samples of graphite, originally in powder form, treated with H2SO4/HNO3. Keywords: graphite, graphene, Raman spectroscopy, intercalation.

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来源期刊

Materia-rio De Janeiro MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

1.00

自引率

25.00%

发文量

审稿时长

6 weeks

期刊介绍： All the articles are submitted to a careful peer-reviewing evaluation process by the journal''s Editorial Board. The Editorial Board, reviewers and authors make use of a web based proprietary automated tool to deal with the reviewing procedures.the Revista Matéria''s article reviewing restricted access system - SEER. Authors are not informed about the identity of the reviewers.