Mfg. method of cals photocatalyst for hydrogen prodn and method for generating hydrogen therewith

A manufacturing method and photocatalyst technology, which are applied in the directions of cadmium sulfide, chemical instruments and methods, hydrogen production, etc., can solve the problems of insufficient hydrogen activity and increase in the amount of hydrogen generated, and achieve enhanced sintering time, simple manufacturing process, and long catalyst life. Effect

Inactive Publication Date: 2003-09-17
株式会社青丘 +1
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AI Technical Summary

Problems solved by technology

The resulting photocatalyst has a very long life, and the amount of hydrogen generated in water is significantly increased compare

Method used

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Examples

Experimental program
Comparison scheme
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Example

[0051] Specific embodiments (manufacturing examples 1 to 7)

[0052] Mix 125ml of water and CdSO with stirring 4 ·2H 2 O and promoter K 2 Cr 2 O 7 And reactant H 2 S, make it have the composition described in Table 1 below, until precipitation appears. The resulting mixture was stirred and the precipitate was CdCrS precipitate.

[0053] After washing the precipitate with water to pH=7, it was thoroughly washed, and then vacuum-dried at 130°C under a nitrogen stream for 2 hours to obtain CdCrS powder.

[0054] To this dried CdCrS powder is added Ni(NO 3 ) 2 ·6H 2 O, after the Ni content reaches 1% by weight, 6-7 drops of concentrated hydrochloric acid are slowly added dropwise to it with sufficient stirring. The resulting slurry is treated with ultrasound for 3 minutes, dried at 130°C for 2 hours, and then placed in an oxidizing atmosphere at 360°C. After sintering for 4 hours and then sintering in a reducing atmosphere at 360°C for 4 hours, Ni(1 wt%) / Cd[Cr(0.2)]S...

Example

Preparation Example 8

[0055] Except for sintering in an oxidizing atmosphere at 360°C for 2 hours, and then sintering in a reducing atmosphere at 360°C for 2 hours, the same procedure as in Production Example 1 was carried out to obtain the photocatalyst Ni (1 wt%) / Cd[Cr (0.2)]S. (Manufacturing Example 9)

Example

Preparation Example 9

[0056] Except for sintering in an oxidizing atmosphere at 360°C for 2.5 hours, and then sintering in a reducing atmosphere at 360°C for 2.5 hours, the same procedure as in Production Example 1 was carried out to obtain the photocatalyst Ni (1 wt%) / Cd[Cr (0.2)]S. (Manufacturing Example 10)

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Abstract

A method for producing CdS-based photocatalyst for hydrogen generation and a method for producing hydrogen in the presence of CdS. Dissolve the compound containing Cd and M in water, after the M value reaches 0.001-20.00, add H to it 2 S or Na 2 S any reactant, stir to get Cd[M]S precipitate, wash the precipitate with water, and vacuum dry the washed precipitate in a nitrogen (flow) atmosphere at a temperature of 105-150 ℃ for 1.5-3.0 Hours later, add a liquid phase m-containing compound to the dried Cd[M]S precipitate for doping treatment, so that the m content in the entire photocatalyst reaches 0.10 to 5.00% by weight, and the photocatalyst with the following formula I is produced. m(a)/Cd[M(b)]S(I) (in the above general formula, m represents the metal doped as an electron acceptor, which is made from Ni, Pd, Pt, Fe, Ru, Co or their oxides One or more substances selected from; a represents the weight % of m, and its value is 0.10 to 5.00. M is a promoter selected from V, Cr, Al, P, As, Sb, Pb, and b represents M/ (Mole % of (M+Cd), its value is 0.001~20.00.) Make the above-mentioned photocatalyst, contact with the water that adds 0.05~1.0 mole sodium sulfite reducing agent and 0.05~1.0 mole sodium sulfide electron donor to suspend it, while stirring While irradiating the light in the visible light region adjusted by the filter and sunlight, it reacts to generate hydrogen.

Description

technical field [0001] The present invention relates to the manufacture method of the cadmium sulfide series photocatalyst that produces hydrogen and the method that uses it to produce hydrogen; Hydrogen method. Background technique [0002] Hydrogen is a raw material used to manufacture ammonia, methanol, etc., and is an essential raw material for the hydrogenation reaction that converts unsaturated compounds into saturated compounds. At the same time, hydrogen is used in hydroprocessing processes such as hydrogenation reaction, desulfurization reaction, denitrogenation reaction, and demetallization reaction, especially hydrogen is used in the immobilization reaction of carbon dioxide, which is the cause of global warming . Moreover, hydrogen is regarded as one of the non-polluting and clean alternative energy sources, and people are eagerly looking forward to using it as a future energy source to replace the current mineral raw materials. [0003] ...

Claims

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Application Information

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IPC IPC(8): C01B3/04B01J23/06B01J23/80B01J23/843B01J27/04B01J27/043B01J27/049B01J27/138B01J27/14B01J35/00B01J35/02C01B3/06C01G11/02
CPCB01J27/138B01J35/002B01J35/004Y02E60/36B01J27/04
Inventor 朴大喆白振旭
Owner 株式会社青丘
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