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Preparation method of precious-metal-free high-activity photocatalytic-water-splitting hydrogen-producing catalyst

A catalyst and high-activity technology, applied in the field of photocatalysis, can solve the problems of restricting industrial applications, and achieve the effects of small investment, easy preparation process, and high hydrogen production activity

Active Publication Date: 2015-02-04
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] After literature search, it was found that the Chinese invention patent application number is CN201310030567, and the name is: a Pt / CdS composite visible light catalyst and its preparation method. Shows good photocatalytic hydrogen production activity, but the catalyst contains noble metal platinum, which limits its industrial application

Method used

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  • Preparation method of precious-metal-free high-activity photocatalytic-water-splitting hydrogen-producing catalyst
  • Preparation method of precious-metal-free high-activity photocatalytic-water-splitting hydrogen-producing catalyst
  • Preparation method of precious-metal-free high-activity photocatalytic-water-splitting hydrogen-producing catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This example relates to a noble metal-free high-activity photocatalyst for hydrogen production from water splitting NiO x -CdS, its preparation method specifically comprises the following steps:

[0026] 1. 200ml of sodium sulfide solution (0.14mol / L) was added dropwise to 250ml of cadmium acetate solution (0.14mol / L) under stirring conditions, aged for 24h, filtered, washed, transferred to a 200ml hydrothermal kettle, heated at 200°C for 24h, naturally Cool, filter and wash, and dry at 40°C to obtain CdS for future use.

[0027] 2. Control group: Weigh 0.1g CdS, disperse it in 100ml methanol solution (30vol%), place it in a photocatalytic reactor made of Pyrex glass, add dropwise 2.0ml chloroplatinic acid (3.86*10 -3 mol / L), the amount of platinum relative to CdS is 1.5wt%. Direct external irradiation under 300W xenon lamp, use sodium nitrite (1mol / L) to filter out light with a wavelength below 400nm, and the gas produced by the photocatalytic reaction is quantitativ...

Embodiment 2

[0030] This example relates to a noble metal-free high-activity photocatalyst for hydrogen production from water splitting NiO x -CdS, its preparation method specifically comprises the following steps:

[0031] 1. 200ml of sodium sulfide solution (0.14mol / L) was added dropwise to 250ml of cadmium acetate solution (0.14mol / L) under stirring conditions, aged for 24h, filtered, washed, transferred to a 200ml hydrothermal kettle, heated at 200°C for 24h, naturally Cool, filter and wash, and dry at 40°C to obtain CdS for future use.

[0032] 2. Control group: Weigh 0.1g CdS, disperse it in 100ml methanol solution (30vol%), place it in a photocatalytic reactor made of Pyrex glass, add dropwise 2.0ml chloroplatinic acid (3.86*10 -3 mol / L), the amount of platinum relative to CdS is 1.5wt%. Direct external irradiation under 300W xenon lamp, use sodium nitrite (1mol / L) to filter out light with a wavelength below 400nm, and the gas produced by the photocatalytic reaction is quantitativ...

Embodiment 3

[0035] This example relates to a noble metal-free high-activity photocatalyst for hydrogen production from water splitting NiO x -CdS, its preparation method specifically comprises the following steps:

[0036] 1. 200ml of sodium sulfide solution (0.14mol / L) was added dropwise to 250ml of cadmium acetate solution (0.14mol / L) under stirring conditions, aged for 24h, filtered, washed, transferred to a 200ml hydrothermal kettle, heated at 200°C for 24h, naturally Cool, filter and wash, and dry at 40°C to obtain CdS for future use.

[0037] 2. Weigh 0.1g of CdS, disperse it in 100ml of methanol solution (30vol%), place it in a photocatalytic reactor made of Pyrex glass, add dropwise 2.77ml of nickel acetate solution (0.0025M), the mole of nickel relative to Cd The ratio is 0.01:1, then add 0.5g of sodium hydroxide, direct external irradiation under a 300W xenon lamp, use sodium nitrite (1mol / L) to filter out the light with a wavelength below 400nm, and use the gas produced by the...

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Abstract

The invention discloses a preparation method of a precious-metal-free high-activity photocatalytic-water-splitting hydrogen-producing catalyst. In the invention, photocatalytically hydrogen-producing activities of a precious-metal-free NiOx-CdS photocatalyst, a precious-metal-free Ni-CdS photocatalyst and a precious-metal-free flower-shaped Ni / Ni(OH)2-CdS photocatalyst are all better than that of Pt-CdS, wherein the NiOx-CdS photocatalyst, the Ni-CdS photocatalyst and the Ni / Ni(OH)2-CdS photocatalyst are prepared respectively through an in-situ photodeposition method, a hydrothermal reduction method and a hydrothermal method. NiOx and Ni can effectively transfer and separate photoproduced electronics and holes so that the photocatalytically hydrogen-producing activity of the catalyst is enhanced. In addition, because of an unique flower-shaped structure of the flower-shaped Ni / Ni(OH)2, CdS can be inserted into a laminated structure of the Ni / Ni(OH)2 well and be contacted tightly with the Ni / Ni(OH)2, thereby forming a composite catalyst having an excellent photocatalytically hydrogen-producing activity under a photochemical effect.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and relates to a preparation method of a photocatalyst, in particular to a preparation method of a noble metal-free high-activity photolysis water hydrogen production catalyst. Background technique [0002] Hydrogen energy has the advantages of light weight, abundant resources, high calorific value (142,351KJ / kg), and environmental friendliness. Many scientists believe that hydrogen energy will become an important energy source on the world energy stage in the 21st century. There are many ways to prepare hydrogen, such as electrolysis of water, petroleum gas cracking, photocatalytic water splitting, etc. Since photocatalytic water splitting to produce hydrogen can widely utilize natural energy—solar energy, and has outstanding features such as low energy consumption, mild reaction conditions, easy operation, and can reduce secondary pollution. 2 Emissions reduction targets offer technolog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/043C01B3/04
CPCY02E60/36
Inventor 陈小平上官文峰陈澍林彩芳江治
Owner SHANGHAI JIAO TONG UNIV
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