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Co-combustion preparation method of sulfur-doped graphene quantum dots

A graphene quantum dot, sulfur doping technology, applied in the directions of graphene, nanotechnology, nanocarbon, etc., can solve the problem of single energy band structure of graphene quantum dots, and achieve excellent optoelectronic properties, simple method and low cost. Effect

Active Publication Date: 2017-11-28
KUNMING INST OF PHYSICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] What the present invention is to solve is the problem that the energy band structure of existing graphene quantum dots is single, and provides a kind of co-combustion of sulfur-doped graphene quantum dots prepared by co-combustion method using cheap liquid paraffin and carbon disulfide as raw materials Preparation

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  • Co-combustion preparation method of sulfur-doped graphene quantum dots
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  • Co-combustion preparation method of sulfur-doped graphene quantum dots

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Embodiment 1

[0028] Example 1: A co-combustion preparation method of sulfur-doped graphene quantum dots, through the doping of heterogeneous sulfur atoms, to effectively modulate the structure and energy level of graphene quantum dots, thereby modulating the photoelectric properties of graphene quantum dots , the sulfur-doped graphene quantum dots are obtained by co-combustion, ultrasonic and other preparation methods:

[0029] (1) Co-combustion: take 5g of liquid paraffin and 1g of carbon disulfide with a straw, mix them evenly, put them into a clean pure white cotton wick bottle and ignite them, clamp a clean glass slide with tweezers at 25-30cm above the flame, collect and burn The sulfur-doped carbon nanospheres produced in the process, after the combustion is extinguished, all the sulfur-doped carbon nanospheres on the glass slide are collected;

[0030] (2) Ultrasonic liquid phase exfoliation: Add a dispersant to the sulfur-doped carbon nanospheres. The dispersant is N-methylpyrrolid...

Embodiment 2

[0032] Example 2: A co-combustion preparation method of sulfur-doped graphene quantum dots, through the doping of heterogeneous sulfur atoms, to effectively modulate the structure and energy level of graphene quantum dots, thereby modulating the photoelectric properties of graphene quantum dots , the sulfur-doped graphene quantum dots are obtained by co-combustion, ultrasonic and other preparation methods:

[0033] (1) Co-combustion: take 5g of liquid paraffin and 1g of carbon disulfide with a straw, mix them evenly, put them into a clean pure white cotton wick bottle and ignite them, clamp a clean glass slide with tweezers at 25-30cm above the flame, collect and burn The sulfur-doped carbon nanospheres produced in the process, after the combustion is extinguished, all the sulfur-doped carbon nanospheres on the glass slide are collected;

[0034] (2) Ultrasonic liquid phase exfoliation: Add a dispersant to the sulfur-doped carbon nanospheres. The dispersant is N-methylpyrrolid...

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Abstract

The invention provides a co-combustion preparation method of a sulfur doped graphene quantum dot and relates to a preparation method of a graphene quantum dot, in particular to the co-combustion preparation method which adopts cheap liquid paraffin and carbon disulfide as raw materials for preparation of the sulfur doped graphene quantum dot with a co-combustion method. According to the co-combustion preparation method of the sulfur doped graphene quantum dot, a structure and an energy level of the graphene quantum dot are effectively modulated through doping of heterogeneous sulfur atoms, so that photoelectrical properties of the graphene quantum dot are modulated, and the co-combustion preparation method of the sulfur doped graphene quantum dot is characterized in that the sulfur doped graphene quantum dot is obtained with the co-combustion preparation method, an ultrasonic preparation method and the like. According to the co-combustion preparation method of the sulfur doped graphene quantum dot, the overall technical route is innovative, the price is low, sulfur doped carbon nanospheres prepared with the co-combustion method are subjected to ultrasonic liquid-phase stripping, the sulfur doped graphene quantum dot is successfully prepared and has excellent photoelectrical properties, the extra energy level of the graphene quantum dot is increased, and the performance of the graphene quantum dot is effectively improved.

Description

technical field [0001] The invention relates to a preparation method of graphene quantum dots, in particular to a co-combustion preparation method of sulfur-doped graphene quantum dots prepared by a co-combustion method using cheap liquid paraffin and carbon disulfide as raw materials. Background technique [0002] In recent years, the preparation and doping technology of graphene quantum dots have attracted much attention. Graphene quantum dots are graphene single-layer or few-layer graphene fragments with a thickness of 0.5-1.5nm and a particle size of about 10nm. The surface contains carbonyl, hydroxyl, carboxyl and other groups to make it have good water solubility and Excellent chemical inertness, good biocompatibility, non-toxicity, low quenching and stable chemical characteristics, but also has a larger surface area than graphene, better surface grafting, and can be combined through π-π conjugation The introduction of more functional groups makes it an important carb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184B82Y40/00
CPCC01P2002/72C01P2002/82C01P2002/84C01P2004/03C01P2004/04C01P2006/60
Inventor 唐利斌姬荣斌项金钟高树雄
Owner KUNMING INST OF PHYSICS
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