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A kind of pt-modified au/cuse tangential heterogeneous nanomaterial and preparation method thereof

A nanomaterial, heterogeneous technology, applied in the field of Au/CuSe tangential heterogeneous nanomaterials and its preparation, can solve the problem of limiting the light trapping ability and photoelectric conversion efficiency of heterogeneous catalysts, fast carrier recombination rate, and carrier recombination. problems such as limited transfer paths, to achieve the effect of enhancing the performance of photocatalytic hydrogen production

Active Publication Date: 2022-04-26
WUHAN INSTITUTE OF TECHNOLOGY
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the currently reported metal-semiconductor heterogeneous photocatalysts, the plasmonic carriers are mostly metal nanocrystals, and the plasmonic donors in the heterostructure are limited, which greatly limits the photoharvesting ability and photoelectric conversion of heterogeneous catalysts. efficiency
In addition, currently reported metal-semiconductor heterogeneous nanomaterials are mostly two components, and the carrier transfer path between metal and semiconductor is limited, resulting in a fast carrier recombination rate, low utilization rate, and low photocatalytic activity.

Method used

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  • A kind of pt-modified au/cuse tangential heterogeneous nanomaterial and preparation method thereof
  • A kind of pt-modified au/cuse tangential heterogeneous nanomaterial and preparation method thereof
  • A kind of pt-modified au/cuse tangential heterogeneous nanomaterial and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0031] (1) Preparation of nano-gold seed solution

[0032] 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 rpm to obtain a nano-gold seed solution.

[0033] (2) Preparation of nano-gold colloidal solution

[0034]Get 30mL concentration and be that hexadecyltrimethylammonium bromide of 0.2M, 6mL concentration be that the chloroauric acid solution of 5mM and 3.5mL concentration be that the ascorbic acid solution of 0.01M mixes to obtain the first mixed solution, 40 μ L step (1) The obtained nano-gold seed solution was added to the first mixed 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 obtained reacti...

Embodiment 2

[0036] The preparation of embodiment 2 sodium selenium hydride

[0037] 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 3

[0038] Preparation of Au / CuSe tangential heterogeneous nanomaterials modified by embodiment 3Pt

[0039] The average particle diameter prepared in embodiment 1 is that the concentration of the nano-gold colloid solution of 20nm is adjusted to 50nM, and gets 5mL, adds the ascorbic acid solution that 1mL concentration is 0.1M, the hexamethyltetraammonium solution that 1mL concentration is 0.1M and 1mL concentration is 0.2M cetyltrimethylammonium bromide solution, then add 60μL concentration of 0.1M sodium selenium hydride solution and 600μL concentration of 10mM copper acetate solution to obtain the second mixed solution, the second mixed solution Transfer to a test tube for packaging, vacuumize in a vacuum drying oven and heat to 90°C for 8 hours. After the reaction, centrifuge and resuspend the obtained solid product in deionized water to obtain an aqueous solution of Au / CuSe tangential heterogeneous nanomaterials.

[0040] Adjust the concentration of the obtained Au / CuSe tang...

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Abstract

The invention relates to a method for preparing a Pt-modified Au / CuSe tangential heterogeneous nanomaterial, comprising: S1. preparing a nano-gold colloid solution under a hexadecyltrimethylammonium bromide system; S2. adopting aqueous phase synthesis The method uses gold nanospheres as the growth substrate, sodium selenium hydride and copper acetate as precursors, ascorbic acid as the reducing agent, and hexadecyltrimethylammonium bromide as the surfactant, and reacts under vacuum to obtain Au / CuSe tangential heterogeneous Nanomaterial aqueous solution; S3. Growing Pt nanoparticles on the surface of gold nanospheres and two-dimensional copper selenide nanodisks to obtain Pt-modified Au / CuSe tangential heterogeneous nanomaterials. The present invention utilizes the all-aqueous phase method to prepare Pt-modified Au / CuSe tangential heterogeneous nanomaterials, and the prepared heterogeneous nanomaterials have stable and controllable morphology, and the double plasmon coupling effect is obvious. There is significant photon absorption in the infrared region, and the photocatalytic hydrogen production performance is excellent.

Description

technical field [0001] The invention relates to the technical field of preparation of inorganic nanomaterials, in particular to a Pt-modified Au / CuSe tangential heterogeneous nanomaterial and a preparation method thereof. Background technique [0002] Metal-semiconductor heterogeneous nanomaterials based on plasmons have excellent properties such as photoelectric conversion and photon absorption, and have shown great application potential in the field of photocatalysis. In the currently reported metal-semiconductor heterogeneous photocatalysts, the plasmonic carriers are mostly metal nanocrystals, and the plasmonic donors in the heterostructure are limited, which greatly limits the photoharvesting ability and photoelectric conversion of heterogeneous catalysts. efficiency. In addition, currently reported metal-semiconductor heterogeneous nanomaterials are mostly two components, and the carrier transfer path between metal and semiconductor is limited, resulting in fast carri...

Claims

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Application Information

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IPC IPC(8): B01J27/057C01B3/04
CPCB01J27/0573C01B3/042C01B2203/0277C01B2203/1076B01J35/39Y02E60/36
Inventor 马良陈相柏
Owner WUHAN INSTITUTE OF TECHNOLOGY
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