The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 30, 2017
Filed:
Jan. 17, 2014
Shenzhen Cantonnet Energy Services Co., Ltd, Shenzhen, CN;
Mingdong Zhang, Shenzhen, CN;
Linde Zhang, Shenzhen, CN;
SHENZHEN CANTONNET ENERGY SERVICES CO., LTD, Shenzhen, CN;
Abstract
A method for preparing graphene quantum dots in large-scale, comprising: dispersing graphene oxide uniformly in the first solvent to obtain a first dispersion liquid, adding reducing agent into the first dispersion liquid and dispersing uniformly to give a mixed solution; treating the mixed solution for 10˜60 mins under microwave environment with the power being at 500˜800 W, then cooling and separating to obtain the solid as a crude product; mixing, one of the reducing polyhydroxy aldehyde or organic acid with the crude product, following by adding the Lewis acid to obtain a mixture, dispersing the mixture in a second solvent uniformly to obtain a second dispersion liquid; putting wherein the second dispersion liquid into microwave treatment for 0.2-1 hours with the microwave power being 500˜800 w, then stripping for 2˜3 hours under ultrasonic power of 120˜300 w, purifying to obtain the graphene quantum dots.