Metallic nickel modified sulfur-indium-zinc photocatalyst and preparation method and application thereof

A technology of photocatalyst, sulfur indium zinc, which is applied in the preparation of photocatalytic materials and photocatalysis, can solve the problems of low sunlight utilization rate and low quantum efficiency, and achieve simple preparation method, simple production process, superior catalytic performance and stability Effect

Inactive Publication Date: 2020-04-17
FUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Zn 2 S 4 It has attracted much attention due to its ideal band gap (about 2.16 eV) and suitable energy band structure. However, single-component photocatalysts always have problems such as low utilization rate of sunlight and low quantum efficiency.

Method used

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  • Metallic nickel modified sulfur-indium-zinc photocatalyst and preparation method and application thereof
  • Metallic nickel modified sulfur-indium-zinc photocatalyst and preparation method and application thereof
  • Metallic nickel modified sulfur-indium-zinc photocatalyst and preparation method and application thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0025] A Ni-ZnIn 2 S 4 The preparation method of composite photocatalyst comprises the following steps:

[0026] (1) Preparation of sulfur indium zinc ZnIn by hydrothermal method 2 S 4 nanomaterials:

[0027] Dissolve zinc nitrate hexahydrate, indium chloride tetrahydrate, and cetyltrimethylammonium bromide in deionized water, and stir magnetically at room temperature for 30 minutes; then add thioacetamide to the above solution; stir again After 30 min, the mixture was transferred to a polytetrafluoroethylene-lined stainless steel autoclave, and the autoclave was kept at 160 °C for 16 h; then, it was naturally cooled to room temperature to obtain a yellow solid; washed with absolute ethanol and deionized water to Residues were removed, and the final product was dried in a vacuum oven for 12 hours;

[0028] (2) Photodeposition method to prepare metal nickel-modified sulfur indium zinc Ni-ZnIn 2 S 4 Composite photocatalyst:

[0029] Ultrasonically disperse the sulfur ind...

Embodiment 1

[0039] Ni-ZnIn 2 S 4 Preparation of composite photocatalyst:

[0040] (1) ZnIn 2 S 4 The preparation is the same as Comparative Example 1;

[0041] (2) ZnIn 2 S 4 Ultrasonic dispersion into ethanol, adding nickel chloride solution, flowing nitrogen for 30 minutes, and irradiating with visible light with a wavelength greater than 420nm for 60 minutes. After washing with ethanol and drying in a vacuum oven, nickel-modified sulfur indium zinc (Ni-ZnIn 2 S 4 ) composite photocatalyst. (Ni and ZnIn 2 S 4 The mass ratio is 0.3%).

[0042] Photocatalytic hydrogen production coupling benzyl alcohol selective oxidation experiment:

[0043] Take 10.4 μL benzyl alcohol and 10 mL deionized water in the reactor, add 5 mg 0.3%Ni-ZnIn 2 S 4 Photocatalyst, placed under visible light (λ > 420 nm) for 5 hours under inert gas conditions, produced 21.8 μmol of hydrogen, 71.5 μmol of benzaldehyde, 89.6% conversion of benzyl alcohol, and 89.6% conversion of benzaldehyde The selectivi...

Embodiment 2

[0045] Ni-ZnIn 2 S 4 Preparation of composite photocatalyst:

[0046] (1) ZnIn 2 S 4 The preparation is the same as Comparative Example 1;

[0047] (2) ZnIn 2 S 4 Ultrasonic dispersion into ethanol, adding nickel chloride solution, flowing nitrogen for 30 minutes, and irradiating with visible light with a wavelength greater than 420nm for 60 minutes. After washing with ethanol and drying in a vacuum oven, nickel-modified sulfur indium zinc (Ni-ZnIn 2 S 4 ) composite photocatalyst. (Ni and ZnIn 2 S 4 The mass ratio is 0.5%). Its TEM picture is as follows figure 1 (B) shown.

[0048] Photocatalytic hydrogen production coupling benzyl alcohol selective oxidation experiment:

[0049] Take 10.4 μL benzyl alcohol and 10 mL deionized water in the reactor, add 5 mg 0.5%Ni-ZnIn 2 S 4 The photocatalyst was exposed to visible light (λ > 420 nm) for 5 hours under inert gas conditions, and the amount of hydrogen produced was 36.5 μmol, and the amount of benzaldehyde produce...

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Abstract

The invention belongs to the technical fields of photocatalytic material preparation and photocatalysis, and specifically relates to a Ni-ZnIn2S4 composite photocatalyst material and a preparation method thereof, and the application of the Ni-ZnIn2S4 composite photocatalyst in photocatalytic hydrogen production coupled with selective oxidation of benzyl alcohol under visible light irradiation. TheNi-ZnIn2S4 photocatalytic composite material is prepared through a simple photodeposition method, and the prepared Ni-ZnIn2S4 photocatalytic composite material has higher hydrogen production performance and higher performance of selectively oxidizing benzyl alcohol to produce benzaldehyde compared with a ZnIn2S4 nanomaterial. The method is simple in preparation process and mild in reaction conditions, does not contain precious metal with high cost, has important practical application value in the field of selective organic synthesis, and is beneficial for sustainable development of environment and energy.

Description

technical field [0001] The invention relates to a preparation method of a photocatalyst for photocatalytic hydrogen production coupled with selective oxidation of benzyl alcohol, in particular to a nickel-modified sulfur indium zinc (Ni-ZnIn 2 S 4 ) The composite photocatalyst belongs to the field of photocatalytic material preparation and photocatalytic technology. Background technique [0002] With the reduction of fossil fuels, the energy crisis has become a major problem facing people. Since Honda reported hydrogen production by photolysis of water in 1972, hydrogen production by photolysis of water has been extensively studied. At present, most of the systems that study the photolysis of water to produce hydrogen need to add sacrificial agents as electron donors, which not only increases the cost of the system, but also wastes the energy of photogenerated holes in the system, which is not conducive to improving the efficiency of sunlight. Conversion efficiency. In co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/043B01J35/00C01B3/22C07C45/00C07C47/54
CPCB01J27/043B01J35/004C01B3/22C01B2203/06C01B2203/1058C01B2203/1217C07C45/002C07C47/54
Inventor 徐艺军林琼唐紫蓉
Owner FUZHOU UNIV
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