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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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  • Summary
  • Abstract
  • Description
  • Claims
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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 compared with the existing method, but this technology is only limited to a reducing agent, so the hydrogen activity is still insufficient

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach ( manufacture Embodiment 1～7

[0052] Mix 125 mL of water, CdSO 4 2H 2 O and cocatalyst K 2 Cr 2 o 7 and reactant H 2 S, so that it has the composition recorded in Table 1 below, until precipitation occurs. The resulting mixture was stirred and the precipitate was a CdCrS precipitate.

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

[0054] Ni(NO 3 ) 2 ·6H 2 O, after making the Ni content reach 1% by weight, slowly add 6-7 drops of concentrated hydrochloric acid therein under full stirring, and the obtained slurry is treated with ultrasonic waves for 3 minutes, dried at 130°C for 2 hours, and then heated in an oxidizing atmosphere at 360°C After sintering for 4 hours and further sintering in a reducing atmosphere at 360° C. for 4 hours, Ni(1% by weight) / Cd[Cr(0.2)]S was obtained. (Manufacturing Example 8)

manufacture Embodiment 8

[0055] In addition to 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 process as in Manufacturing Example 1 was carried out to obtain the photocatalyst Ni (1% by weight) / Cd[Cr (0.2)] S. (Manufacturing Example 9)

manufacture Embodiment 9

[0056] In addition to 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 process as in Manufacturing Example 1 was carried out to obtain the photocatalyst Ni (1% by weight) / Cd[Cr (0.2)] S. (Manufacturing Example 10)

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PUM

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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
CPCB01J27/138Y02E60/36B01J35/30B01J35/39B01J27/04
Inventor 朴大喆白振旭
Owner 株式会社青丘
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