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Photocatalyst and preparation method thereof

A technology of photocatalyst and catalyst, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as poor stability

Inactive Publication Date: 2015-05-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The photocatalyst has high activity and stability, which solves the problem of poor stability of CdS photocatalysts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Weigh 4.3g Cd(CH 3 COO) 2 2H 2 O, 3.94g Mn(CH 3 COO) 2 4H 2 O was dissolved in 30ml of water, and 2.42g of thioacetamide was added; it was added to a stainless steel hydrothermal synthesis reactor and heated at 160°C for 18h; Green single phase Mn 0.46 Cd 0.54 S complex metal sulfide, the lower layer is dark green α-MnS; isolated yellow-green Mn 0.46 Cd 0.54 S sample, the Mn 0.46 Cd 0.54 S sample added to THF of Ru 3 (CO) 12 Soaked in solution (0.2mol / L) for 5h, filtered, and then vacuum-dried, the sample was reacted at 220°C for 12h to make Ru 3 (CO) 12 converted to RuO 2 , the final product is RuO 2 mn 0.46 Cd 0.54 S, where RuO 2 The mass of Mn 0.46 Cd 0.54 0.5% of the mass of S composite metal sulfide. This catalyst 0.2g is added to the Na of 200ml 0.5mol / L 2 S and 0.5mol / L Na 2 SO 3 In the mixed solution, stir slowly, and use a 500W xenon lamp to irradiate the sample, and the hydrogen production rate is 2835μmol·h -1 g -1 , after 1 day of c...

Embodiment 2

[0023] Add 5mg Ag(CH 3 COO), all the other conditions are the same as embodiment 1, and the final product obtained is RuO 2 Ag 0.001 mn 0.4598 Cd 0.5397 S, RuO 2 The mass of Ag 0.001 mn 0.4598 Cd 0.5397 0.5% of the mass of S composite metal sulfide. The hydrogen production reaction conditions of the catalyst are the same as in Example 1, and the hydrogen production rate of the catalyst for hydrogen production by decomposing water under visible light is 3324 μmol h -1 g -1 , after continuous use for 2 days, the catalytic activity of the catalyst did not change.

Embodiment 3

[0025] Cd(CH 3 COO) 2 2H 2 The mass of O becomes 5g, Mn(CH 3 COO) 2 4H 2 The quality of O becomes 3.28g, Ag(CH 3 COO) quality becomes 5mg, all the other conditions are with embodiment 2, obtain final product and be RuO 2 Ag 0.001 mn 0.3698 Cd 0.6297 S, where RuO 2 The mass of Ag 0.001 mn 0.3698 Cd 0.6297 0.5% of the mass of S composite metal sulfide. The hydrogen production reaction conditions of the catalyst are the same as in Example 1, and the hydrogen production rate of the catalyst for hydrogen production by decomposing water under visible light is 3567 μmol h -1 g-1 , after continuous use for 2 days, the catalytic activity of the catalyst did not change.

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Abstract

The invention discloses a photocatalyst. The photocatalyst is composed of RuO2 and Mn1-xCdxS composite metal sulfide according to a mass ratio of 0.01-8:100 and preferably 0.02-4:100, and x in the Mn1-xCdxS composite metal sulfide is 0-1 and preferably 0.5-0.9. A preparation method of the photocatalyst comprises a preparation process of the composite metal sulfide and a RuO2 loading process. The photocatalyst has high active stability, and solves the problem of low stability of CdS photocatalysts.

Description

technical field [0001] The invention relates to a photocatalyst and a preparation method thereof, in particular to a visible light catalyst and a preparation method thereof. Background technique [0002] Hydrogen energy is an ideal green energy source. Converting solar energy and water into efficient and clean hydrogen energy is one of the most promising methods to solve future energy and environmental problems. In 1972, Japanese scholars Fujishima and Honda discovered TiO 2 The phenomenon of photocatalytic water splitting on the electrode provides a basis for photocatalytic water splitting to produce hydrogen, and also accelerates the research pace of converting light energy into chemical energy. Semiconductor photocatalytic water splitting to produce hydrogen is to float semiconductor particles in water, and decompose water into hydrogen and oxygen under light conditions. The whole process converts solar energy into chemical energy, which has the advantages of environme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/045
Inventor 李建涛张鹏李宝忠刘忠生郭宏山方向晨
Owner CHINA PETROLEUM & CHEM CORP