Graphene quantum dot and ionic liquid compound and application thereof to Cr(VI) detection

A technology of graphene quantum dots and ionic liquids, applied in measuring devices, instruments, fluorescence/phosphorescence, etc., to achieve the effects of stable fluorescence performance, rapid detection, and obvious selective recognition capabilities
CN106323928AActive Publication Date: 2017-01-11HUAWEI TEHCHNOLOGIES CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUAWEI TEHCHNOLOGIES CO LTD
Publication Date
2017-01-11

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Abstract

The invention belongs to the field of application of novel materials to analytical chemistry and discloses a graphene quantum dot and ionic liquid compound and application thereof to Cr(VI) detection. A method for preparing the graphene quantum dot and ionic liquid compound includes: mixing graphene quantum dots with ionic liquid, and purifying after reaction to obtain the graphene quantum dot and ionic liquid compound, wherein the complex is 2.0-4.0nm in size and 0.23nm in lattice spacing, and the ionic liquid refers to 1-butyl-3-methylimidazole bromide. The graphene quantum dot and ionic liquid compound BMIMBr-GQDs has a great fluorescence property and more stable in fluorescence property than graphene quantum dots which are not combined with the ionic liquid. In addition, the BMIMBr-GQDs has an evident Cr(VI) selective recognition capability and is capable of realizing rapid and sensitive detection of Cr(VI) in samples.
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Description

technical field

[0001] The invention relates to the application field of new materials in analytical chemistry, in particular to a graphene quantum dot-ionic liquid compound and its application in detecting Cr(VI). Background technique

[0002] Inorganic anions widely exist in the ecosystem, and some inorganic anions are seriously harmful to the environment and human health. Potassium dichromate is widely used in printing, enamel production, glass, and dye industries, and a large amount of Cr(VI) is released into natural water bodies during use. Water-soluble Cr(VI) is usually oxyacid CrO 4 2- 、Cr 2 o 7 2- exist in other forms and transform into each other.

[0003] Cr(VI) is an ingestion / inhalation poison, and skin contact may cause allergy; inhalation may cause cancer or cause genetic defects, and has persistent danger to the environment. So far, many methods have been used to determine Cr(VI) in the environment, such as spectrophotometry, liquid chromatography, ato...

Claims

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