Semi-core-shell Au/Cu2-xS heterogenous nano-material and preparation method therefor

A cu2-xs, nanomaterial technology, applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve problems such as low catalytic efficiency and limited practical application

Inactive Publication Date: 2019-12-20
WUHAN INSTITUTE OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Copper chalcogenide semiconductor is a kind of photocatalyst with great development potential, and is widely used in the treatment of photocatalytic pollutants. At the same time, copper chalcogenide and gold nanocrystals are also good Fenton-like catalysts. The catalytic efficiency of the as-prepared single-component copper chalcogenide and gold nanocrystal Fenton-like reaction is relatively low, which limits its practical application

Method used

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  • Semi-core-shell Au/Cu2-xS heterogenous nano-material and preparation method therefor
  • Semi-core-shell Au/Cu2-xS heterogenous nano-material and preparation method therefor
  • Semi-core-shell Au/Cu2-xS heterogenous nano-material and preparation method therefor

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Effect test

Embodiment 1

[0029] The preparation of embodiment 1 nano gold colloidal solution

[0030] (1) Preparation of nano gold seed solution

[0031] Add 4.5mL of 0.2M cetyltrimethylammonium bromide solution, 5mL of deionized water, 500μL of 0.05M chloroauric acid solution and 600μL of 0.01M sodium borohydride ice-water mixture into the test tube and react at room temperature for 2h. During the reaction process, a magnet was used to stir, and the magnetic stirrer was set at 1000 rpm to obtain a nano-gold seed solution.

[0032] (2) Preparation of nano-gold colloidal solution

[0033]Get 90mL 0.2M cetyl trimethyl cyanogen bromide solution, 18mL 5mM chloroauric acid solution and 10.5mL 10mM ascorbic acid solution and mix to obtain the first mixed solution, add 60 μL of nano gold seed solution obtained in step (1) to the first Add 1mL of 1M sodium hydroxide solution to the mixed solution, adjust the pH to 11.3-11.7, place the resulting reaction system in a biochemical incubator at 25-35°C for 1 hou...

Embodiment 2

[0035] Example 2 Half core-shell Au / Cu 2-x Preparation of S heterogeneous nanomaterials

[0036] 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 hexadecyltrimethylammonium bromide solution, 70 μL of 0.1 M thioacetamide solution and 300 μL of 10 mM copper acetate solution to obtain the second mixed solution, transfer the second mixed solution to a test tube for packaging , placed in a vacuum oven to evacuate and then heated to 90°C for 3h to obtain half-core-shell Au / Cu 2-x S is an aqueous solution of heterogeneous nanomaterials, cooled to room temperature, and centrifuged at 8000rpm for 5 minutes to obtain a solid product. The solid product is washed alternately with deionized water and ethanol, dried in a blast drying oven at 65°C ...

Embodiment 3

[0039] Get the concentration prepared in 5mL embodiment 1 and be 45nM, average particle diameter is the nano-gold colloid solution of 22nm, add the ascorbic acid solution that 1mL concentration is 0.07M, the hexamethyltetraammonium solution that 1mL concentration is 0.07M and 1mL concentration are 0.17M M hexadecyltrimethylammonium bromide solution, 70 μL of 0.08 M thioacetamide solution and 300 μL of 7 mM copper acetate solution to obtain the second mixed solution, transfer the second mixed solution to a test tube and pump Vacuum packaged, placed in a vacuum oven and then heated to 94°C for 3.2h to obtain half-core-shell Au / Cu 2-x S is an aqueous solution of heterogeneous nanomaterials, cooled to room temperature, and centrifuged at 8000rpm for 5 minutes to obtain a solid product. The solid product is washed alternately with deionized water and ethanol, dried in a blast drying oven at 70°C and kept for 12 hours to obtain Semi-core-shell Au / Cu 2-x S Heterogeneous Nanomaterial...

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Abstract

The invention relates to a preparation method for a semi-core-shell Au/Cu2-xS heterogenous nano-material. The method comprises the following steps: S1. preparing a nano gold colloid solution in a cetyl trimethyl ammonium bromide system, wherein the particle size of nano gold is 18nm to 22nm; S2. carrying out a vacuum reaction in the presence of hexamethylene tetramine by employing an aqueous phasesynthesis method in a manner of taking the nano gold as a growth substrate, taking thioacetamide and cupric acetate as precursors, taking ascorbic acid as a reducer and taking cetyl trimethyl ammonium bromide as an auxiliary growth agent, so as to obtain an aqueous solution of the semi-core-shell Au/Cu2-xS heterogenous nano-material; and S3. carrying out separating, washing and drying, thereby obtaining the semi-core-shell Au/Cu2-xS heterogenous nano-material. The method is simple and controllable, and the prepared semi-core-shell Au/Cu2-xS heterogenous nano-material has a yield higher than 97% and has excellent bis-plasmon reinforced photocatalytic and multiphase Fenton catalytic activity.

Description

technical field [0001] The invention relates to the technical field of preparation of inorganic nanomaterials, in particular to a semi-core-shell Au / Cu 2-x SHeterogeneous nanomaterials and their preparation methods. Background technique [0002] Metal-semiconductor heterogeneous nanomaterials based on plasmons have shown great application potential in the field of photocatalytic solar energy conversion due to the excellent photon absorption and photoelectric conversion properties produced by the synergistic effect of plasmons and semiconductors. Copper chalcogenide semiconductor is a kind of photocatalyst with great development potential, and is widely used in the treatment of photocatalytic pollutants. At the same time, copper chalcogenide and gold nanocrystals are also good Fenton-like catalysts. The catalytic efficiency of the prepared single-component copper chalcogenide and gold nanocrystal Fenton-like reaction is relatively low, which limits its practical application....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04C02F1/72C02F1/30B82Y40/00B82Y30/00B22F9/24B22F1/02C02F101/38
CPCB01J27/04B01J35/004C02F1/725C02F1/722C02F1/30B82Y40/00B82Y30/00B22F9/24C02F2305/10C02F2305/026C02F2101/38C02F2101/308B22F1/16
Inventor 马良陈相柏
Owner WUHAN INSTITUTE OF TECHNOLOGY
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