Preparation method of sulfur-doped carbon quantum dot

A technology of carbon quantum dots and sulfur doping, applied in the direction of nano-carbon, nanotechnology, etc., can solve the problems of expensive preparation process and cumbersome carbon source materials, and achieve the effects of large-scale preparation, good repeatability and low reaction temperature
CN108529593AInactive Publication Date: 2018-09-14TAIYUAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TAIYUAN UNIV OF TECH
Publication Date
2018-09-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a preparation method of sulfur-doped carbon quantum dot. According to the preparation method, polyvinyl alcohol is taken as a carbon source, concentrated sulfuric acid dehydration carbonization, washing, and purifying are adopted so as to obtain the sulfur-doped carbon quantum dot; the particle size of the sulfur-doped carbon quantum dot ranges from 1 to 10nm. The preparation method comprises following steps: polyvinyl alcohol is dried, and is added into a certain amount of concentrated sulfuric acid so as to obtain a dispersion solution with a concentration ranging from 0.25 to 2g / L; mechanical stirring is carried out, and reaction is carried out for 4 to 12h at 20 to 60 DEG C; and filtering, washing, centrifugation, and drying are carried out so as to obtain the sulfur-doped carbon quantum dot powder with blue fluorescence performance. The preparation method is simple; the raw materials are low in cost; reaction consumption amount is low; and the application prospect in the field of fluorescent label and material preparation is promising.
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Description

technical field

[0001] The invention relates to a method for preparing sulfur-doped carbon quantum dots, belonging to the technical field of nanomaterial preparation. Background technique

[0002] Carbon quantum dots are a kind of zero-dimensional carbon nanomaterials, whose particle size is usually less than 10nm, has a quasi-spherical structure, and consists of a carbonaceous core and surface functional groups. Carbon quantum dots not only have good luminescence characteristics and small size effect, but also overcome the shortcomings of metal quantum dots with high toxicity and great environmental hazards. It has good application prospects in many fields such as medical imaging technology, environmental monitoring, chemical analysis, catalyst preparation, optical device manufacturing and thin film material preparation.

[0003] The current research on the synthesis method of carbon quantum dots is devoted to simple, low-cost, size-controllable and large-scale production,...

Claims

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