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Preparation method of bismuth sulfide nanoparticle and graphene composite material

A nanoparticle and composite material technology, which is applied in the field of preparation of bismuth sulfide nanoparticles and graphene composite materials, can solve the problems of large-scale production of air pollution materials, and achieve the effects of low equipment cost, simple experimental methods, and wide application prospects

Inactive Publication Date: 2021-01-12
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, at present, there are very few preparation methods for uniformly growing bismuth sulfide nanoparticles on graphene. Bismuth sources, precursors of sulfur sources, may need to provide harsh experimental environments, such as high temperature, high pressure, and oxygen-free conditions, which will cause air pollution and limit mass production of materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Dissolve 0.2mmol of bismuth ammonium citrate and 0.3mmol of thioacetamide in 60ml of ultrapure water, add 80mg of graphene oxide, fully dissolve through ultrasonic and magnetic stirring, pour the mixed solution into a three-necked flask and place it in an oil bath , stirred magnetically at 95°C for 2 h, and then added 60 μL of hydrazine hydrate to continue the reaction for 2 h. After the reaction, the black product was collected by centrifugation at a speed of 8000r / min for 15min, washed three times with deionized water and absolute ethanol to remove impurities, and then vacuum-dried in a vacuum oven at 60°C for 8h. The composite material of bismuth sulfide nanoparticles and graphene is obtained.

Embodiment 2

[0027] Dissolve 0.5mmol bismuth ammonium citrate and 0.75mmol thioacetamide in 60ml ultrapure water, add 75mg graphene oxide, fully dissolve through ultrasonic and magnetic stirring, pour the mixed solution into a three-necked flask and place it in an oil bath , stirred magnetically at 85°C for 2 h, and then added 70 μL of hydrazine hydrate to continue the reaction for 4 h. After the reaction, the black product was collected by centrifugation at a speed of 9000r / min for 15min, then washed three times with deionized water and absolute ethanol to remove impurities, and then vacuum-dried in a vacuum oven at 60°C for 8h. The composite material of bismuth sulfide nanoparticles and graphene is obtained.

Embodiment 3

[0029] Dissolve 0.15mmol bismuth ammonium citrate and 0.225mmol thioacetamide in 60ml ultrapure water, add 60mg graphene oxide, fully dissolve through ultrasonic and magnetic stirring, pour the mixed solution into a three-necked flask and place it in an oil bath , stirred magnetically at 90° C. for 2 h, and then added 50 μL of hydrazine hydrate to continue the reaction for 2 h. After the reaction, the black product was collected by centrifugation at a speed of 12000r / min for 10min, then washed three times with deionized water and absolute ethanol to remove impurities, and then vacuum-dried in a vacuum oven at 50°C for 12h. The composite material of bismuth sulfide nanoparticles and graphene is obtained.

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Abstract

A preparation method of a well-dispersed bismuth sulfide nanoparticle and graphene composite material comprises the following steps: dissolving graphene oxide, bismuth ammonium citrate and thioacetamide in water to prepare a mixed solution, conducting heating in a constant-temperature oil bath in an oil bath pan, so as to combine bismuth ions, sulfur ions and graphene oxide to form a graphene oxide and bismuth sulfide intermediate product, and synthesizing the bismuth sulfide and graphene composite material under the action of a reducing agent hydrazine hydrate. The bismuth sulfide nanoparticles on the graphene are uniform in particle size, the size is about 25 nm, the growth density and the particle size of the bismuth sulfide nanoparticles can be regulated and controlled by controlling the reactant concentration and the reaction time, and the experiment process is simple and effective. The invention not only provides an experimental thought for synthesizing the semiconductor nano composite material of the base graphene, but also can be widely applied to the fields of photoelectrons, catalysis, electrode materials and the like.

Description

technical field [0001] The invention relates to the fields of nanometer materials, optoelectronics, photocatalysis and energy storage, and in particular to a preparation method of a bismuth sulfide nanoparticle and graphene composite material. Background technique [0002] Semiconductor nanomaterials are materials with electrical conductivity between metals and insulators, and have unique photoelectric, pyroelectric, and magnetoelectric properties. Bismuth sulfide (Bi 2 S 3 ) is an inorganic semiconductor material with a direct band gap, which is environmentally friendly and has good optoelectronic properties. The two-dimensional material graphene has unique thermal conductivity, mechanical stability, excellent carrier mobility and chemical stability, etc. By combining bismuth sulfide with graphene, it can not only effectively improve the zero band gap problem of graphene , can also inhibit the recombination of bismuth sulfide electron-hole pairs, and accelerate the overa...

Claims

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Application Information

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IPC IPC(8): C01G29/00C01B32/19
CPCC01G29/00C01B32/19C01P2004/64
Inventor 匡登峰刘刚铄
Owner NANKAI UNIV
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