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Method for directly preparing graphene/cadmium sulfide quantum dot nano composite material with one step by adopting graphite oxide as material

A nanocomposite material and graphene technology, applied in the direction of nanotechnology, nanotechnology, nanostructure manufacturing, etc., can solve the problems of low content of single-layer graphene, difficulty in preparation, high cost of preparation of graphene functional materials, etc., and achieve energy conversion efficiency The effect of high and low manufacturing cost

Inactive Publication Date: 2009-10-21
SHANGHAI UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although graphene has excellent characteristics, its preparation is very difficult, the yield of existing methods is very low, and single-layer graphene is easy to aggregate, making the preparation cost of graphene functional materials very high, and the prepared products are monolayer Layer graphene content is very small

Method used

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  • Method for directly preparing graphene/cadmium sulfide quantum dot nano composite material with one step by adopting graphite oxide as material
  • Method for directly preparing graphene/cadmium sulfide quantum dot nano composite material with one step by adopting graphite oxide as material
  • Method for directly preparing graphene/cadmium sulfide quantum dot nano composite material with one step by adopting graphite oxide as material

Examples

Experimental program
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Effect test

Embodiment 1

[0016] The preparation process and steps in this embodiment are as follows:

[0017] 1. Preparation of graphite oxide and graphene oxide solution: use natural graphite powder as raw material, get 3 grams of natural graphite powder with a fineness of 325 meshes, add 12 milliliters of concentrated sulfuric acid, 2.5 grams of potassium persulfate and 2.5 grams of phosphorus pentoxide , mixed evenly at 80°C, and allowed to react for 4.5 hours; the mixture was cooled to room temperature, diluted with deionized water and allowed to stand overnight, then separated by filtration with a cellulose acetate membrane with 0.2 micron pores, and washed with a large amount of deionized water , the product was left standing overnight at room temperature; the above product, namely pre-oxidized graphite, was stirred and slowly added to a mixed solution of 120 ml of cooled concentrated sulfuric acid at 0°C and 15 grams of potassium permanganate, and stirred at 35°C After 2 hours, dilute with 250 ...

Embodiment 2

[0020] The preparation process and steps in this example are exactly the same as those in Example 1 above. The difference is: the annealing temperature in the high-temperature reactor is 150° C., and the annealing time is 8 hours, and finally the composite material is obtained.

Embodiment 3

[0022] The preparation process and steps in this example are exactly the same as those in Example 1 above. The difference is: the annealing temperature in the high-temperature reactor is 200° C., and the annealing time is 16 hours, and finally the composite material is obtained.

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Abstract

The invention relates to a method for directly preparing graphene / cadmium sulfide quantum dot nano composite material with one step by adopting the graphite oxide as material. The invention provides a simplified technique method, namely the independent preparation step of graphene is saved and skipped, the reduction of graphite oxide or graphene oxide and generation of composite material are finished simultaneously or in one step; and the cadmium sulfide quantum dot has grown on the graphene while the graphite oxide or graphene oxide is reduced to graphene. Therefore, the method can greatly reduce the manufacturing cost of the composite material. The graphene / cadmium sulfide composite material prepared by the method can be used as novel photoelectric conversion material and has higher energy conversion rate.

Description

technical field [0001] The invention relates to a method for directly preparing a graphene / cadmium sulfide quantum dot nanocomposite material by using graphite oxide as a raw material in one step, and belongs to the technical fields of nano inorganic materials and photoelectric conversion energy chemistry. Background technique [0002] Since its independent existence was discovered in 2004, graphene, as a new allotrope of carbon, has a special honeycomb two-dimensional structure composed of a single layer of carbon atoms. It not only has a good Mechanical properties also have unique electrical properties. Although it has not been discovered for a long time, it has attracted the attention of more and more scientists. In view of its excellent mechanical, electronic, physical, and chemical properties, it has attracted widespread attention from various disciplines, and is considered to have great application prospects in a wide range of fields, including electronic devices, ener...

Claims

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Application Information

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IPC IPC(8): B82B3/00
Inventor 曹傲能刘振蔡正伟陈琳吴明红刘元方
Owner SHANGHAI UNIV
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