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Au/CuSe tangential heterogeneous nano material and preparation method thereof

A nanomaterial and heterogeneous technology, which is applied in nanotechnology, chemical instruments and methods, chemical/physical processes, etc., can solve the problem of difficult regulation of heterogeneous structure morphology and structure, poor photocatalytic performance, and plasmon energy. The problem of low utilization rate can achieve the effect of enhancing the performance of photocatalytic hydrogen production and stabilizing the morphology and structure

Active Publication Date: 2019-11-22
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The morphology and structure of heterostructures prepared by these two methods are difficult to control, and the energy utilization rate of plasmons is low, so their photocatalytic performance is not good.

Method used

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  • Au/CuSe tangential heterogeneous nano material and preparation method thereof
  • Au/CuSe tangential heterogeneous nano material and preparation method thereof
  • Au/CuSe tangential heterogeneous nano material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Preparation of nano gold seed solution

[0030] Add 8mL of cetyltrimethylammonium bromide solution with a concentration of 0.1M, 0.5mL of chloroauric acid solution with a concentration of 0.05M and 0.6mL of sodium borohydride ice-water mixture with a concentration of 0.01M into the test tube for 2 hours at room temperature. , during the reaction, stir with a magnet, and the magnetic stirrer is set at 1000 revolutions per minute to obtain a nano-gold seed solution.

[0031] (2) Preparation of nano-gold colloidal solution

[0032] Get 30mL concentration of 0.2M hexadecyltrimethylammonium bromide, 6mL concentration of 5mM chloroauric acid solution and 3.5mL concentration of 0.01M ascorbic acid solution and mix to obtain the first solution, 40μL step (1) obtained The nano-gold seed solution was added to the first solution, and then 1 mL of 1M sodium hydroxide was added to adjust the pH value to between 11.3 and 11.7, and the resulting reaction system was placed in a bi...

Embodiment 2

[0034] The preparation of embodiment 2 sodium selenium hydride

[0035] Weigh 75.66 mg of sodium borohydride and dissolve it in 10 mL of deionized water, freeze at -4°C for 8 minutes, add 78.96 mg of selenium powder into the above-mentioned frozen sodium borohydride solution, and keep stirring until completely dissolved to obtain a concentration of 0.1M For the sodium selenium hydride solution, the sodium selenium hydride solution with a concentration of 75 mM and 125 mM was prepared respectively by adjusting the concentrations of sodium borohydride and selenium powder.

Embodiment 3A

[0036] Preparation of embodiment 3 Au / CuSe tangential heterogeneous nanomaterials

[0037]Get the concentration prepared in 5mL embodiment 1 and be 50nM, average particle diameter is the nano-gold colloid solution of 20nm, add the ascorbic acid solution that 1mL concentration is 0.1M, the hexamethyltetraammonium solution that 1mL concentration is 0.1M and 1mL concentration are 0.2 M of cetyltrimethylammonium bromide solution, then add 60 μL of 0.1 M sodium selenium hydride solution and 600 μL of 10 mM copper acetate solution to obtain a second mixed solution, and transfer the second mixed solution to a test tube Packaged, placed in a vacuum drying oven to evacuate and heated to 90°C and kept for 8 hours to obtain an aqueous solution of Au / CuSe tangential heterogeneous nanomaterials, which was cooled to room temperature, centrifuged at 8000rpm for 5 minutes to obtain a solid product, and the solid product The product was washed alternately with deionized water and ethanol, drie...

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Abstract

The invention relates to a preparation method of an Au / CuSe tangential heterogeneous nano material, which comprises the following steps of S1, preparing a nanogold colloidal solution under a hexadecyltrimethyl ammonium bromide system, wherein the particle size of gold nanospheres is 18-22nm; S2, preparing a sodium hydrogen selenide solution; adopting a water-phase synthesis method, taking the gold nanospheres as a growth substrate, the sodium hydrogen selenide and the copper acetate as the precursors, the ascorbic acid as a reducing agent and the hexadecyl trimethyl ammonium bromide as a surfactant, carrying out vacuum reaction in the presence of hexamethylenetetramine to grow a two-dimensional copper selenide nanodisk in the tangential direction of the gold nanospheres so as to obtain anAu / CuSe tangential heterogeneous nano-material aqueous solution; and S3, separating, cleaning and drying to obtain the Au / CuSe tangential heterogeneous nano material. The Au / CuSe tangential heterogeneous nano-material is prepared by using an all-aqueous phase method, and the obtained heterogeneous nano-material is stable in morphology and structure, obvious in double-plasmon coupling effect and excellent in photocatalytic hydrogen production performance.

Description

technical field [0001] The invention relates to the technical field of preparation of inorganic nanomaterials, in particular to an Au / CuSe tangential heterogeneous nanomaterial and a preparation method thereof. Background technique [0002] Two-dimensional copper selenide nanodisks have excellent photoelectric conversion properties, large specific surface area, abundant reaction sites, and strong near-infrared plasmonic photon absorption, showing great application potential in the field of photocatalysis. However, due to the weak absorption of two-dimensional copper selenide nanomaterials in the visible light band, and the rapid recombination of carriers generated by photoexcitation, their practical photocatalytic performance is greatly limited. Combining metal nanocrystals with plasmonic properties with two-dimensional semiconductor nanomaterials, the synergistic effect of plasmons and excitons can greatly improve the photocatalytic performance of heterostructures. Since t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/057B22F9/24B82Y40/00C01B3/04
CPCB01J27/0573B22F9/24B82Y40/00C01B3/042B01J35/393B01J35/23B01J35/39Y02E60/36
Inventor 马良陈相柏
Owner WUHAN INSTITUTE OF TECHNOLOGY
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