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A composite nanomaterial for photocatalytic decomposition of water to produce hydrogen and its preparation method

A composite nanomaterial and photocatalytic technology, which is applied in the field of photocatalytic water decomposition hydrogen production materials and its preparation, can solve the problems of poor hydrogen production effect of P25 photocatalyst, and achieve good application prospects, good stability and high conductivity. Effect

Active Publication Date: 2022-03-18
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a composite nanomaterial and its preparation method for photocatalytic decomposition of water to produce hydrogen, so as to overcome the defects of P25 photocatalyst in the prior art such as poor hydrogen production effect

Method used

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  • A composite nanomaterial for photocatalytic decomposition of water to produce hydrogen and its preparation method
  • A composite nanomaterial for photocatalytic decomposition of water to produce hydrogen and its preparation method
  • A composite nanomaterial for photocatalytic decomposition of water to produce hydrogen and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Nickel (0.32 g) of hexahydrate and nine-water (0.44 g) was added to ultrapure water (20 ml) to mix the proportion of 1: 1, to obtain a uniform dispersion, and then dispersed The mixed solution was transferred to a single neck flask, and N-methylpyrrolidone (30 mL) was heated in the dispersion, heated at 90 ° C for 4 h, naturally cooled to room temperature, washing, freeze, and dried to give Feni-LDH nano sheet.

[0033](2) The above Feni-LDH (20 mg) was pulverized in anhydrous ethanol (20 mL), and the cells were dispersed and uniform, and then the P25 nanoparticles were weighed in anhydrous ethanol solution according to the mass ratio of 5%. Mechanically at room temperature for 12 h, since the Feni-LDH surface belt positively charged, the P25 nanoparticle belt negative electricity can be assembled together by mechanically stirring, and then placed in a blast dryer of 60 ° C, drying, The time was 8 h, which was obtained for Feni-LDH / P25 complex nanomaterial for photoca...

Embodiment 2

[0035] (1) Nickel (0.63 g) of hexahydrate (0.63 g) and nine-water mixture (0.44 g) was stirred in ultrapure water (20 mL) to obtain a uniform dispersion, and then dispersed mixed solution Transfer to a single neck flask, an additional N-methylpyrrolidone (30 mL) in the dispersion in the dispersion, heated at 100 ° C for 5 h, naturally cooled to room temperature, washing, freeze, and dried to give Feni-LDH nano sheet.

[0036] (2) The above Feni-LDH (20 mg) was pulverized in anhydrous ethanol (20 mL), and the cells were dispersed and uniform, and then the P25 nanoparticles were weighed in anhydrous ethanol solution according to the mass ratio of 10%. Mechanically at room temperature for 12 h, since the Feni-LDH surface belt positively charged, the P25 nanoparticle belt negative electricity can be assembled together by mechanically stirring, and then placed in a blast dryer of 60 ° C, drying, The time was 8 h, which was obtained for Feni-LDH / P25 complex nanomaterial for photocatal...

Embodiment 3

[0038] (1) Nickel (0.98 g) of hexahydrate (0.44 g) and nine-water (0.44 g) were added to the proportion of 3: 1 to 3: 1, and the uniform dispersion is obtained, and then dispersed A good mixed solution was transferred to a single neck flask, and an additional N-methylpyrrolidone (30 mL) in the dispersion in the dispersion, heated at 110 ° C for 6 h, naturally cooled to room temperature, washed, freeze dry, gave Feni- LDH.

[0039] (2) The above-mentioned Feni-LDH (20 mg) was pulverized in anhydrous ethanol (20 mL) to obtain a solution of a uniform solution, and then the P25 nanoparticles were weighed according to the mass ratio of 15%, placed in anhydrous ethanol solution. Mechanically at room temperature for 12 h, since the Feni-LDH surface belt positively charged, the P25 nanoparticle belt negative electricity can be assembled together by mechanically stirring, and then placed in a blast dryer of 60 ° C, drying, The time was 8 h, which was obtained for Feni-LDH / P25 complex nan...

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Abstract

The invention relates to a composite nanometer material for photocatalytic decomposition of water to produce hydrogen and a preparation method thereof. The material composition includes semiconducting P25 nanoparticles and FeNi‑LDH. The method comprises: mixing nickel salt, iron salt and ultrapure water, stirring, adding N-methylpyrrolidone, heating and reacting, cooling, washing, freeze-drying, adding semiconductor P25 nanoparticles to the obtained FeNi-LDH dispersion, Stir for electrostatic assembly. The method has the characteristics of simplicity and low cost, and the prepared composite nanomaterial has a thin sheet structure, and has the advantages of high hydrogen production efficiency for photocatalytic water splitting and good photostability, and has good application prospects.

Description

Technical field [0001] The present invention belongs to the photocatalytic decomposition aquatic hydrogen product and the preparation of the present invention, and in particular, the Feni-LDH / P25 composite nanoma material for photocatalytic decomposition of aquatic hydrogen is involved and the preparation method thereof. Background technique [0002] Traditional fossil energy is severe and increasingly exhausted, and environmental issues are constantly threatening the survival of humans. By using cleaning solar energy into hydrogen and oxygen, it is one of the important ways of solar utilization. In recent years, the use of semiconductor photocatalysts to decompose hydrogen, which is expected to become a new generation of hydrogen energy development technology, which is also expected to achieve environmental protection technology for hydrogen in sustainable production. However, now the photocatalysts utilize the solar photocatalytic decomposition water is relatively low, and th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755B01J35/10C01B3/04
CPCB01J23/755B01J35/004B01J35/1004C01B3/042C01B2203/0277Y02E60/36
Inventor 张青红崔文莉王宏志李耀刚侯成义
Owner DONGHUA UNIV
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