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Nano composite material simultaneously modified by non-noble metal cocatalyst and defects as well as preparation method and application thereof

A nano-composite material and co-catalyst technology, applied in the preparation of carbon-based compounds, chemical instruments and methods, preparation of organic compounds, etc., can solve the problems of optimization of preparation conditions and low separation efficiency of photogenerated electrons and holes, and achieve the preparation conditions Optimize and improve the efficiency and high yield of photocatalytic hydrogen production

Pending Publication Date: 2020-05-22
HUAIBEI NORMAL UNIVERSITY
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0004] For the deficiencies in the prior art, the present invention aims at ZnIn 2 S 4 (ZIS) preparation conditions were optimized to provide a novel non-precious metal co-catalyst and defect-modified 2D / 2D-3D Ni at the same time 12 P 5 / V Zn -ZnIn 2 S 4 Nano-hierarchical composite materials and their preparation methods and applications in the field of photocatalysis and fine chemical synthesis. The problem to be solved is the optimization of the preparation conditions of ZIS and the reported low efficiency of photogenerated electron-hole separation of ZIS photocatalysts.

Method used

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  • Nano composite material simultaneously modified by non-noble metal cocatalyst and defects as well as preparation method and application thereof
  • Nano composite material simultaneously modified by non-noble metal cocatalyst and defects as well as preparation method and application thereof
  • Nano composite material simultaneously modified by non-noble metal cocatalyst and defects as well as preparation method and application thereof

Examples

Experimental program
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Embodiment 1

[0041] Such as figure 1 As shown, this embodiment prepares 2D-3D ZIS nanomaterials according to the following steps:

[0042] Step 1, weigh 0.8mmol ZnCl 2 , 1.6mmol InCl 3 4H 2 O and 3.5 mmol CH 3 CSNH 2 In a 100mL polytetrafluoroethylene reactor, add 60mL deionized water-ethanol mixture (30mL water and 30mL ethanol) as a solvent, stir and dissolve to form a uniformly mixed solution;

[0043] Step 2. Put the polytetrafluoroethylene reaction kettle into the steel-jacketed kettle and seal it and keep it at 180°C for 24 hours; after the reaction kettle is naturally cooled to room temperature, the obtained precipitate is alternately washed several times with deionized water and ethanol, and the final product Vacuum drying at 60°C yields 2D-3D ZIS.

Embodiment 2

[0045] Such as figure 2 As shown, the present embodiment prepares 2D NP nanomaterials according to the following steps:

[0046] Step 1, 0.14mmol Ni(NO 3 ) 2 ·6H 2 O was dissolved in 40 mL of deionized water. Then 1.4mmol red phosphorus was dispersed in the above 40mL containing Ni(NO 3 ) 2 ·6H 2 In the solution of O, a uniform suspension was obtained;

[0047] Step 2. Put the suspension into a 50mL steel-jacketed kettle, seal it, and keep it at 180°C for 12 hours; after the reaction is completed, cool it down to room temperature naturally, and wash the obtained precipitate alternately with deionized water and absolute ethanol for several times. Second, the final product was vacuum-dried at 60 °C to obtain 2D NPs.

Embodiment 3

[0049] Such as image 3 As shown, this embodiment prepares 2D / 2D-3D NP / V-ZIS nanocomposites according to the following steps:

[0050] This example is the same as Example 2, except that 0.21 g of the 2D-3D ZIS prepared in Example 1 is added in Step 1. By changing the amount of nickel nitrate and red phosphorus in this example, 2D / 2D-3D NP / V-ZIS nanocomposites with different NP contents can be prepared, such as: the amounts of nickel nitrate and red phosphorus are (0.02mmol, 0.20 mmol), (0.06mmol, 0.60mmol), (0.10mmol, 1.00mmol), (0.14mmol, 1.4mmol), (0.25mmol, 2.5mmol), the mass percent composition of NP in the obtained product is respectively 1%, 3 %, 5%, 7% and 12%.

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Abstract

The invention discloses a nano composite material simultaneously modified by a non-noble metal cocatalyst and defects as well as a preparation method and application thereof. The nano composite material is characterized in that 2D non-noble metal cocatalyst Ni12P5 nanosheets are uniformly loaded on a 3D spherical hierarchical structure assembled by 2D porous ZnIn2S4 nanosheets modified by zinc defects VZn. The photocatalyst prepared by the invention shows excellent activity, selectivity and stability for preparing benzaldehyde and hydrogen by catalyzing benzyl alcohol with visible light, and the preparation method is simple and convenient in steps, mild in reaction conditions and high in yield.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation and photocatalysis, in particular to a 2D / 2D-3D Ni modified simultaneously with non-noble metal promoters and defects 12 P 5 / V Zn -ZnIn 2 S 4 (2D / 2D-3D NP / V-ZIS) nanocomposite materials and their preparation methods and applications in the fields of environmental and energy photocatalysis and biomass conversion. Background technique [0002] Excessive consumption of fossil resources leads to CO 2 Emissions continue to increase, environmental pollution and climate change are becoming increasingly severe, and finding abundant sustainable clean energy has become an important scientific issue of concern to the world. Hydrogen only produces water in combustion or fuel cells, and the energy released by hydrogen combustion is much higher than that of traditional fossil fuels, so it is considered an ideal clean energy carrier. The renewable cycle of biomass is short, and the carbon...

Claims

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Application Information

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IPC IPC(8): B01J27/198C01B3/04C01B3/22C07C45/00C07C47/54
CPCB01J27/198C07C45/002C01B3/042C01B3/22C01B2203/0277C01B2203/1094C01B2203/1058C01B2203/1217B01J35/39C07C47/54Y02E60/36
Inventor 孟苏刚顾晓蒙李勇付先亮陈士夫
Owner HUAIBEI NORMAL UNIVERSITY
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