Preparation method of sulfur and nitrogen codoped graphene quantum dot material

The invention provides a preparation method of sulfur and nitrogen codoped graphene quantum dots, and the method comprises the following steps of: dispersing network-like reduced graphene oxide and thiourea in concentrated nitric acid, heating in an oil bath to 140-160 DEG C under magnetic stirring,...

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Bibliographic Details
Main Authors PEI HEBING, JIA QIANQIAN, MO ZUNLI, ZHANG HONGJUAN
Format Patent
LanguageChinese
English
Published 01.10.2019
Subjects
ADHESIVES
CHEMISTRY
COMPOUNDS THEREOF
DYES
INORGANIC CHEMISTRY
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
NON-METALLIC ELEMENTS
PAINTS
POLISHES
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Summary:The invention provides a preparation method of sulfur and nitrogen codoped graphene quantum dots, and the method comprises the following steps of: dispersing network-like reduced graphene oxide and thiourea in concentrated nitric acid, heating in an oil bath to 140-160 DEG C under magnetic stirring, and carrying out constant temperature reaction for 12-48h under circulating water condensation; removing circulating condensing water, evaporating at constant temperature for 2-3h, cooling to room temperature, adding ultrapure water for ultrasonic dispersion, filtering, performing rotary evaporation and concentrating on filtrate, and placing the filtrate into a 3000-8000 Da dialysis bag for dialysis for 24-48h; performing rotary evaporation and concentrating on dialysate again, and vacuum freeze-drying to obtain the sulfur and nitrogen co-doped graphene quantum dots. The preparation method improves the luminous stability of the sulfur and nitrogen co-doped graphene quantum dots to a certainextent, effectively simp
Bibliography:Application Number: CN201910564778