Zero-dimensional ZnSe-one-dimensional FeSe2 heterojunction catalyst as well as preparation method and application thereof

A heterojunction and catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of low internal carrier separation and transmission efficiency, large band gap, and large differences

Pending Publication Date: 2022-03-29
HANGZHOU DIANZI UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

There is no report to obtain zero-dimensional ZnSe-one-dimensional FeSe 2 For heterojunction catalysts, the applicant found that the zero-dimensional nanoparticle ZnSe single material has a large band gap (2.7eV), high internal resistance, and low internal carrier separation and transmission efficiency. If it can be combined with One-dimensional narrow bandgap semiconductor FeSe 2 Composite, it is expected to get zero-dimensional ZnSe-one-dimensional FeSe with enhanced performanc

Method used

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  • Zero-dimensional ZnSe-one-dimensional FeSe2 heterojunction catalyst as well as preparation method and application thereof
  • Zero-dimensional ZnSe-one-dimensional FeSe2 heterojunction catalyst as well as preparation method and application thereof
  • Zero-dimensional ZnSe-one-dimensional FeSe2 heterojunction catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1g Zn(CH 3 COO) 2 2H 2 O, 1g SeO 2 , 2g sodium cetylbenzenesulfonate, 6g hydrazine hydrate, and 50g water are mixed according to the mass ratio of 1:1:2:6:50, and placed in a hydrothermal reaction kettle for hydrothermal reaction; the hydrothermal reaction temperature is 160°C , the constant temperature time is 12 hours; the solid-liquid mixture after the hydrothermal reaction is subjected to solid-liquid centrifugation, the liquid product is poured out, the solid product is taken out, washed alternately with deionized water and alcohol for 3 times, and then dried at 70°C for 4 hours; the dried product is ground into powder to obtain zero-dimensional nano-particle ZnSe; the above 10g zero-dimensional nano-particle ZnSe, 1g FeCl 3 , 2g Na 2 SeO 3 , 4g of cetyltrimethylammonium bromide, 4g of hydrazine hydrate and 50g of water are mixed according to the mass ratio of 10:1:2:4:4:50 to form a precursor solution, which is placed in a hydrothermal reaction kettle for hyd...

Embodiment 2

[0032] 1g Zn(CH 3 COO) 2 2H 2 O, 1g SeO 2 , 3g of sodium cetylbenzenesulfonate, 8g of hydrazine hydrate, and 50g of water are mixed according to the mass ratio of 1:1:3:8:50, and placed in a hydrothermal reaction kettle for hydrothermal reaction. The hydrothermal reaction temperature is 180°C , the constant temperature time is 14 hours; the solid-liquid mixture after the hydrothermal reaction is subjected to solid-liquid centrifugation, the liquid product is poured out, the solid product is taken out, washed alternately with deionized water and alcohol for 3 times, and then dried at 80°C for 5 hours; the dried product is ground into powder to obtain zero-dimensional nano-particle ZnSe; the above 10g zero-dimensional nano-particle ZnSe, 2g FeCl 3 , 3g Na 2 SeO 3 , 5g of cetyltrimethylammonium bromide, 6g of hydrazine hydrate and 50g of water are mixed according to the mass ratio of 10:2:3:5:6:50 to form a precursor solution, which is placed in a hydrothermal reaction kettl...

Embodiment 3

[0038] 1g Zn(CH 3 COO) 2 2H 2 O, 2g SeO 2 , 4g sodium cetylbenzenesulfonate, 10g hydrazine hydrate, and 50g water are mixed according to the mass ratio of 1:2:4:10:50, and placed in a hydrothermal reaction kettle for hydrothermal reaction. The hydrothermal reaction temperature is 200°C , the constant temperature time is 16 hours; the solid-liquid mixture after the hydrothermal reaction is subjected to solid-liquid centrifugation, the liquid product is poured out, the solid product is taken out, washed alternately with deionized water and alcohol for 3 times, and then dried at 80°C for 6 hours; the dried product is ground into powder to obtain zero-dimensional nano-particle ZnSe; the above 10g zero-dimensional nano-particle ZnSe, 2g FeCl 3 , 4g Na 2 SeO 3 , 6g of cetyltrimethylammonium bromide, 8g of hydrazine hydrate and 50g of water are mixed according to the mass ratio of 10:2:4:6:8:50 to form a precursor solution, which is placed in a hydrothermal reaction kettle for h...

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Abstract

The invention relates to a zero-dimensional ZnSe-one-dimensional FeSe2 heterojunction catalyst as well as a preparation method and application of the zero-dimensional ZnSe-one-dimensional FeSe2 heterojunction catalyst. The method comprises the following steps: mixing Zn (CH3COO) 2.2 H2O, SeO2, sodium hexadecyl benzene sulfonate, hydrazine hydrate and water to form a precursor solution, and putting the precursor solution into a hydrothermal reaction kettle for hydrothermal reaction to obtain zero-dimensional nano granular ZnSe; zero-dimensional nano granular ZnSe, FeCl3, Na2SeO3, cetyltrimethylammonium bromide, hydrazine hydrate and water are mixed into a precursor solution, and the precursor solution is placed in a hydrothermal reaction kettle to be subjected to secondary hydrothermal reaction. The catalytic hydrogen production rate and the photocurrent density of the zero-dimensional ZnSe-one-dimensional FeSe2 heterojunction catalyst prepared by the preparation scheme are 2.4 times and 3 times of those of a single ZnSe product respectively, and the performance of the heterojunction photocatalyst is obviously enhanced. The method is simple in process, easy to control and high in production efficiency.

Description

technical field [0001] The invention relates to a zero-dimensional ZnSe-one-dimensional FeSe 2 Heterojunction catalyst and its preparation method and application. Background technique [0002] ZnSe is a new type of photoelectric material, and it has been reported that zero-dimensional nanoparticle ZnSe can be obtained by hydrothermal synthesis. This zero-dimensional nanoparticle ZnSe has a large specific surface area and exhibits certain photoelectric conversion and catalytic properties. FeSe 2 It is a one-dimensional nano-rod material, which is suitable for loading nano-particle materials to construct heterojunction structure materials. Studies have shown that constructing catalysts with heterojunction structures can improve the catalytic activity of traditional single catalyst materials. There is no report to obtain zero-dimensional ZnSe-one-dimensional FeSe 2 For heterojunction catalysts, the applicant found that the zero-dimensional nano-particle ZnSe single materia...

Claims

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Application Information

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IPC IPC(8): B01J27/057C01B3/22
CPCB01J27/0573B01J35/0013B01J35/004B01J35/0033C01B3/22
Inventor 熊小山张峻田鹏辉
Owner HANGZHOU DIANZI UNIV
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