Preparation of sulfur-doped graphite by solid-state microwave method: The effect of reaction conditions on the sulfur-doping process

[Display omitted] •A rapid solid-state microwave method was proposed and optimized for the preparation of SGi.•The thiophene-S (CSC) was the preferential conformation of sulfur in SGi.•The dosage of H2SO4 used in intercalation reaction determined whether S-doping achieve or not. The high-quality sul...

Full description

Saved in:
Bibliographic Details
Published in:Chemical physics letters 2019-09, Vol.731, p.136615, Article 136615
Main Authors: Li, Fan, Xu, Wanjun, Lu, Linyi, Zhou, Kai, Xia, Zhining
Format: Article
Language:English
Subjects:
Carbon materials
Intercalation reaction
Large-scale production
Solid-state microwave
Sulfur-doping
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:[Display omitted] •A rapid solid-state microwave method was proposed and optimized for the preparation of SGi.•The thiophene-S (CSC) was the preferential conformation of sulfur in SGi.•The dosage of H2SO4 used in intercalation reaction determined whether S-doping achieve or not. The high-quality sulfur-doped graphite (SGi) was prepared from concentrated sulfuric acid-graphite intercalation compounds (H2SO4-GICs) by solid-state microwave irradiation, where H2SO4 was the sulfur (S) source and S-doping occurred within a minute. The preparation of H2SO4-GICs was a key step for S-doping and exfoliation process. Notably, it was found that S-doping was influenced by the dosage of H2SO4, where the lower dosage of H2SO4 was beneficial for the S-doping. The exfoliation efficiency was greatly affected by the temperature and dosage of oxidant, where lower temperature and lower dosage of KMnO4 guaranteed efficient exfoliation.
ISSN:0009-2614
1873-4448
DOI:10.1016/j.cplett.2019.136615