Preparation method of cadmium sulfide carbon-based composite material serving as photoelectric catalyst

A technology of carbon-based composite materials and catalysts, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of poor light stability of cadmium sulfide, low sunlight absorption efficiency, photogenerated electrons and holes Fast recombination and other issues, to achieve good photostability, high visible light response, and a wide range of sources

Active Publication Date: 2017-01-04
青岛富强新材料科技有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, as a photocatalytic material, it has some disadvantages: first, photogenerated electrons and holes recombine quickly, resulting in low absorption efficiency of sunlight; second, cadmium sulfide has poor photostability

Method used

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  • Preparation method of cadmium sulfide carbon-based composite material serving as photoelectric catalyst
  • Preparation method of cadmium sulfide carbon-based composite material serving as photoelectric catalyst
  • Preparation method of cadmium sulfide carbon-based composite material serving as photoelectric catalyst

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Embodiment 1

[0023] Embodiment one, according to figure 1 , 2 , Shown in 3, 4, a kind of cadmium sulfide carbon-based composite material is used as the preparation method of photoelectric catalyst, and concrete steps are as follows:

[0024] Step 1, using the principle of carrageenan gel to drop 2g of ι-carrageenan raw material with a mass fraction of 2% into 100ml of ethanol solution of hydrochloric acid with a concentration of 2mol L-1 to form a gel and remove impurities from the gel deal with;

[0025] Step 2, immerse the carrageenan gel after removing impurities into the ethanol solution of 1.5mol L-1 cadmium acetate in the amount concentration of 100ml of substance, and process 3 to 5 times;

[0026] Step 3, wash the above-mentioned gel with ethanol and water for 2 to 3 times, put the treated gel in the refrigerator, and then freeze-dry to form cadmium-carrageenan airgel;

[0027] Step 4: The cadmium-carrageenan airgel is calcined in a tube furnace through a certain carbonization p...

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Abstract

The invention discloses a preparation method of a cadmium sulfide carbon-based composite material serving as a photoelectric catalyst. The preparation method is simple in preparation process, does not need expensive devices, and an obtained product is high in quality and good in performance. According to the technical scheme, the preparation method comprises the steps that 1, the gelling principle of carrageenan is utilized to dropwise add the carrageenan dissolved at high temperature to an ethanol solution of hydrochloric acid to form gel, and gel impurity removing treatment is performed; 2, the carrageenan gel subjected to impurity removal is immersed into a certain concentration of cadmium acetateethanol solution, and multiple times of treatment are performed; 3, the gel is washed with ethyl alcohol and water step by step, the treated gel is put in a refrigerator, freeze drying is performed to form cadmium-carrageenan aerogel; 4, the cadmium-carrageenan aerogel is calcined in a tubular furnace by adopting a certain carbonization process, then high-temperature decarbonization is performed in carbon dioxide to obtain a cadmium sulfide carbon-based composite photoelectric catalyst; 5, the photoelectron catalysis performance of the product is tested by using an electric chemical workstation and an xenon lamp system.

Description

technical field [0001] The invention belongs to the field of photoelectric catalysis, in particular to a method for preparing a cadmium sulfide carbon-based composite material as a photoelectric catalyst. Background technique [0002] Cadmium sulfide (CdS) has a band gap of 2.4eV at room temperature and has excellent visible light absorption properties. The narrow band gap and negative conduction band edge of CdS make it a promising photocatalytic material. However, as a photocatalytic material, it has some disadvantages: firstly, photogenerated electrons and holes recombine quickly, resulting in low absorption efficiency of sunlight; secondly, cadmium sulfide has poor photostability. Facing these problems, it is very meaningful to develop a stable CdS photocatalyst. [0003] Carrageenan is a seaweed macromolecular polysaccharide extracted from red algae (as shown in Figure a). Its chemical structure is a linear polysaccharide composed of sulfated or non-sulfated galactose...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04
CPCB01J27/04B01J35/0033B01J35/004B01J37/082B01J37/32
Inventor 杜法富
Owner 青岛富强新材料科技有限公司
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