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Photocatalyst and its preparing process

A photocatalyst and catalyst technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as poor stability and low efficiency

Inactive Publication Date: 2007-09-12
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the existing problems are: ① low efficiency, ② poor stability

Method used

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  • Photocatalyst and its preparing process

Examples

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Embodiment 1

[0028] Embodiment 1: the preparation process of catalyst CdS. Dissolve 20g of cadmium acetate in 500mL of water to form a solution, then add 500mL of 0.14M Na 2 S·9H 2 O solution. After continuing to stir for 24 hours, 830 mL of water was filtered off, and the remaining slurry was transferred to a 200 mL polytetrafluoroethylene-lined autoclave for hydrothermal treatment at 200°C for 24 hours. After filtration, washing and vacuum drying, an orange-yellow precipitate was obtained. The catalyst prepared in this embodiment is a hexagonal phase (see accompanying drawing 1), and the catalyst is a nanoparticle with a high degree of crystallinity, and its diameter is 30-50 nm (see accompanying drawing 2, accompanying drawing 3).

Embodiment 2

[0029] Embodiment 2: Catalyst Cd 0.84 Zn 0.16 The preparation process of S. 20g of cadmium acetate and 3.12g of zinc acetate were dissolved in 500mL of water to form a solution, and then 500mL of 0.14M Na 2 S·9H 2 O solution. After continuing to stir for 24 hours, 830 mL of water was filtered off, and the remaining slurry was transferred to a 200 mL polytetrafluoroethylene-lined autoclave for hydrothermal treatment at 200°C for 24 hours. After filtration, washing and vacuum drying, an orange-yellow precipitate was obtained. The catalyst prepared in this embodiment is mainly based on cubic phase and contains hexagonal phase (see accompanying drawing 4)

Embodiment 3

[0030] Embodiment 3: Catalyst Cd 0.88 Zn 0.12 The preparation process of S. Concrete process is as embodiment 2, but the amount of zinc acetate is changed into 2.26g.

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Abstract

The present invention relates to one kind of photocatalyst for high efficiency visible light catalysis to decompose H2S for preparing H2. The photocatalyst has the composition of MI(x)+MIIS(z) / Cd1-yZnyS, where, MI is noble Ru, Rh, Ir, Pt and / or Au, x is 0-0.05, y is 0-0.5, MII is one of Pd, Mo and W, and z is 0-0.2. The catalyst is high crystallized nanometer particle of D50 in 10-70 nm.

Description

technical field [0001] The invention relates to a photocatalytic decomposition of H with high efficiency using visible light 2 A photocatalyst for producing hydrogen and a preparation method thereof. It belongs to the field of photocatalytic hydrogen production. Background technique [0002] Hydrogen is a high-energy density, high-efficiency, and clean energy. As a fuel for fuel cells, it has attracted great attention from industry and society because of its high energy conversion efficiency and no pollution to the environment. In addition, hydrogen is also one of the most important raw materials in the chemical industry, and is widely used in the synthesis of ammonia, methanol, and petroleum refining. At present, most of the hydrogen in the world is produced from fossil fuels, and a small part comes from electrolyzed water and others. Of the current world hydrogen production (up to 500 billion cubic meters per year), hydrogen production from natural gas accounts for 48%,...

Claims

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Application Information

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IPC IPC(8): B01J27/04B01J35/02B01J37/03B01J37/08C01B3/04
CPCY02E60/364Y02E60/36
Inventor 李灿鄢洪建马贵军吴国鹏宗旭栾国有雷志斌
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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