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ZnO radical photocatalyst preparation method

A photocatalyst and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of low hydrogen catalyst activity and low hydrogen production rate, Achieve the effects of good catalyst activity, low cost and low energy

Inactive Publication Date: 2010-06-02
INST OF PETROCHEM HEILONGJIANG ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the invention is in order to solve existing photolysis H 2 The problem of low activity and low hydrogen production rate of S hydrogen production catalyst, and a preparation method of ZnO-based photocatalyst is provided

Method used

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specific Embodiment approach 1

[0007] Specific embodiment 1: The preparation method of the ZnO-based photocatalyst of this embodiment is implemented in the following steps: 1. Mix zinc acetate and citric acid at a molar ratio of 1 to 3:1, and then add 0.87L of distilled water and 0.87 to 1mol of zinc acetate. The ratio of L ethanol is made into a mixed solution, and then ultrasonic treatment is performed at an ultrasonic frequency of 30 to 50 kHz and a temperature of 25 to 35°C for 20 to 40 minutes to obtain a white precipitate; 2. Add ammonia to the white precipitate in step 1 to make it white The precipitation completely disappeared and a colorless transparent sol was formed; 3. Add a cadmium nitrate solution with a molar concentration of 3-6 mol / L and a volume of 8-14 mL to the colorless transparent sol obtained in step 2, and then add a molar concentration of 1~ 3mol / L sodium sulfide with a volume of 18-50mL to obtain the catalyst precursor; 4. The catalyst precursor is evaporated to dryness at a temperat...

specific Embodiment approach 2

[0009] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step 1, the ultrasonic frequency is 40 kHz and the temperature is 30°C. The other steps and parameters are the same as in the first embodiment.

[0010] The purpose of ultrasonic treatment in this embodiment is to complete the reaction between the various reactants in the solution.

specific Embodiment approach 3

[0011] Specific embodiment three: This embodiment is different from specific embodiment one in that in step one, zinc acetate and citric acid are mixed at a molar ratio of 2:1. The other steps and parameters are the same as in the first embodiment.

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Abstract

The invention discloses a preparation method of a ZnO-based photo-catalyst, relating to a preparation method of a photo-catalyst. The method solves the problems that in the existing method for producing hydrogen by the photolysis of H2S, a used catalyst has low activity and the production rate of the hydrogen is low. The method includes the following steps: 1. zinc acetate and citric acid are dissolved in distilled water and ultrasonic processing is carried out after ethanol is added so as to obtain white deposition; 2. a colorless and transparent solvent is prepared; 3, a catalyst precursoris prepared; 4. the catalyst precursor is evaporated to be dry; 5. air is fed and roast is carried out, thereby obtaining the ZnO-based photo-catalyst which has good catalytic activity, the hydrogen production rate up to 14mL / h per g to 66mL / h per g and the purity up to 99.0 percent. The utilization efficiency of visible light is high, the consumed energy is low and the addition of expensive metalis not needed, therefore, the preparation technology is simple and the cost is low.

Description

Technical field [0001] The invention relates to a preparation method of a photocatalyst. Background technique [0002] Hydrogen energy has been regarded as an ideal pollution-free green energy in the new century. The use of solar energy as the primary energy source in the formation of hydrogen energy has made hydrogen energy development more promising. Scientists call this technology that uses only sunlight and water to produce hydrogen as "one of the ideal technologies for mankind." However, there are many problems in the use of photocatalysts to produce hydrogen at present-photolysis of H 2 S hydrogen production catalyst has low activity and low hydrogen production rate (decomposition H 2 The hydrogen production rate of S is 7~10mL / h·g) and H 2 S hydrogen production catalysts are generally UV-responsive, so it is urgent to develop a photocatalyst with high activity response to visible light. Summary of the invention [0003] The purpose of the present invention is to solve the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/08B01J23/06C01B3/04
CPCY02E60/364Y02E60/36
Inventor 王艳华白雪峰
Owner INST OF PETROCHEM HEILONGJIANG ACADEMY OF SCI
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