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Surface plasmon photocatalyst with broad spectrum absorption and preparation method thereof

A surface plasmon and photocatalyst technology, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of low photocatalytic efficiency and low utilization rate constraints, and achieve enhanced electric field Intensity, promotion of generation and separation, effect of enhancing photocatalytic performance

Active Publication Date: 2018-08-03
DALIAN NATIONALITIES UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the low photocatalytic efficiency and low utilization of visible and near-infrared light restrict the development of this technology.

Method used

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  • Surface plasmon photocatalyst with broad spectrum absorption and preparation method thereof
  • Surface plasmon photocatalyst with broad spectrum absorption and preparation method thereof
  • Surface plasmon photocatalyst with broad spectrum absorption and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] The method for preparing the Au nanorod seed solution was as follows: in a glass bottle with a capacity of 20 mL, 5 mL of 0.5 mM chloroauric acid was mixed with 5 mL of 0.2 M cetyltrimethylammonium bromide solution, and then injected with 0.6 mL of fresh For the prepared 0.01M sodium borohydride solution, stop stirring after 2 minutes, and let it stand at room temperature for 30 minutes before use. The preparation method of the growth solution is as follows. Dissolve 7.0g of cetyltrimethylammonium bromide and 1.234g of sodium oleate in 250mL of warm water at 50°C in a conical flask with a capacity of 1L, and wait for the solution to cool to 30°C , add 18mL 4mM silver nitrate solution, keep 15min; then add 250mL 1mM chloroauric acid solution, stir for 90min, add 3mL hydrochloric acid (12.1M) to adjust the pH value; after slow stirring for 15min, add 1.25mL0.064M ascorbic acid solution, stir vigorously After 30 s, inject 0.8 mL of the seed solution into the growth solutio...

Embodiment 2

[0034] The method for preparing the Au nanorod seed solution was as follows: in a glass bottle with a capacity of 20 mL, 5 mL of 0.5 mM chloroauric acid was mixed with 5 mL of 0.2 M cetyltrimethylammonium bromide solution, and then injected with 0.6 mL of fresh For the prepared 0.01M sodium borohydride solution, stop stirring after 2 minutes, and let it stand at room temperature for 60 minutes before use. The preparation method of the growth solution is as follows. Dissolve 7.0g of cetyltrimethylammonium bromide and 1.234g of sodium oleate in 250mL of warm water at 50°C in a conical flask with a capacity of 1L, and wait for the solution to cool to 30°C , add 24mL 4mM silver nitrate solution, keep 15min; then add 250mL 1mM chloroauric acid solution, stir for 90min, add 5mL hydrochloric acid (12.1M) to adjust the pH value; after slow stirring for 15min, add 1.25mL0.064M ascorbic acid solution, stir vigorously After 30 s, inject 0.5 mL of the seed solution into the growth solutio...

Embodiment 3

[0038] The method for preparing the Au nanorod seed solution was as follows: in a glass bottle with a capacity of 20 mL, 5 mL of 0.5 mM chloroauric acid was mixed with 5 mL of 0.2 M cetyltrimethylammonium bromide solution, and then injected with 0.6 mL of fresh For the prepared 0.01M sodium borohydride solution, stop stirring after 2 minutes, and let it stand at room temperature for 45 minutes before use. The preparation method of the growth solution is as follows. Dissolve 7.0g of cetyltrimethylammonium bromide and 1.234g of sodium oleate in 250mL of warm water at 50°C in a conical flask with a capacity of 1L, and wait for the solution to cool to 30°C , add 36mL 4mM silver nitrate solution, keep 15min; then add 250mL 1mM chloroauric acid solution, stir for 90min, add 2mL hydrochloric acid (12.1M) to adjust the pH value; after slow stirring for 15min, add 1.25mL0.064M ascorbic acid solution, stir vigorously After 30 s, inject 0.3 mL of the seed solution into the growth solutio...

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Abstract

The invention relates to a surface plasmon photocatalyst. According to the invention, precious metal Pt nanoparticles are grown at two ends of an Au nano rod, a CdS case layer is grown at a middle part of the Au nano rod, and the surface plasmon photocatalyst is constructed; a preparation method comprises the following steps: the Au nano rod is prepared through a seed growth method, silver nitrate, sodium hydroxide, ascorbic acid and a chloroplatinic acid solution are added in a cetyl trimethyl ammonium bromide aqueous solution of the Au nano rod for a reaction, centrifugation is carried out to obtain the products at two ends of the Au nano rod, the prepared Au nano rod solution with two ends grown with the Pt nanoparticles is added in a cadmium acetate and thioacetamide solution for the reaction, and centrifugation is carried out on a final product to obtain the surface plasmon photocatalyst with the two ends grown with Pt and the middle part grown with Cds of the Au nano rod. The photocatalysis material has excellent photocatalytic decomposition of water into hydrogen.

Description

technical field [0001] The invention relates to a high-efficiency photocatalyst and a preparation method. Background technique: [0002] With the increasingly serious problems of environmental pollution and energy crisis, it has become a worldwide problem that plagues human existence, and people urgently need to find new recyclable green energy. Solar energy has the advantages of universality, harmlessness, large reserves, and long-term durability. The technology of using solar photocatalytic decomposition of water to produce hydrogen has attracted widespread attention. When hydrogen energy is burned, it can not only release huge energy, but also generate pollution-free water, which greatly reduces environmental pollution. At the same time, it can effectively convert solar energy into fuel energy. However, low photocatalytic efficiency and low utilization of visible and near-infrared light restrict the development of this technology. Therefore, improving photocatalytic eff...

Claims

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Application Information

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IPC IPC(8): B01J27/045B01J37/16B01J37/03C01B3/04
CPCC01B3/042B01J27/045B01J37/031B01J37/16B01J35/393B01J35/23B01J35/39Y02E60/36
Inventor 张振翼吴金磊吕娜刘奎朝董斌
Owner DALIAN NATIONALITIES UNIVERSITY
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