A kind of cadmium sulfide/nickel tungstate composite visible light catalyst, preparation method and application

A technology of nickel tungstate and catalyst, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of high electron-hole recombination rate and low photocatalytic activity of pure nickel tungstate , to achieve good stability, excellent photocatalytic activity, and strong light absorption range

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

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Problems solved by technology

As a member of the tungstate family, nickel tungstate (NiWO 4 ) has a narrow band gap energy (2.6eV), and has a certain ability to oxidize and decompose various organic substances, so it is considered to have a promising photocatalyst, but due to its high electron-hole recombination rate, the photocatalytic activity of pure nickel tungstate still low

Method used

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  • A kind of cadmium sulfide/nickel tungstate composite visible light catalyst, preparation method and application
  • A kind of cadmium sulfide/nickel tungstate composite visible light catalyst, preparation method and application
  • A kind of cadmium sulfide/nickel tungstate composite visible light catalyst, preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0025] (1) Preparation of nickel tungstate: add 0.33g of nickel nitrate and 0.291g of sodium tungstate into 30ml of deionized water respectively, and stir magnetically for 2 hours to obtain a homogeneous solution. Then the sodium tungstate solution was added dropwise to the nickel nitrate solution, and the stirring was continued for 2 hours. Then, the obtained mixed solution was transferred to a 100ml reactor, and reacted hydrothermally at 180°C for 16 hours. The obtained product was centrifuged and washed 3 times with deionized water and ethanol, and dried at 100°C for 2 hours, and finally the dried powder was calcined in a muffle furnace at 700°C for 4 hours to obtain a light yellow powdery nickel tungstate sample .

[0026] (2) Preparation of cadmium sulfide / nickel tungstate composite photocatalyst: Weigh 0.1g nickel tungstate and add it to 70ml ethylene glycol, stir magnetically for 1h, then add 0.018432g cadmium acetate, continue ultrasonication for 1h, then add 0.0052g s...

Embodiment 2

[0028] (1) Preparation of nickel tungstate: add 0.33g of nickel nitrate and 0.291g of sodium tungstate into 30ml of deionized water respectively, and stir magnetically for 2 hours to obtain a homogeneous solution. Then the sodium tungstate solution was added dropwise to the nickel nitrate solution, and the stirring was continued for 2 hours. Then, the obtained mixed solution was transferred to a 100ml reactor, and reacted hydrothermally at 180°C for 16 hours. The obtained product was centrifuged and washed 3 times with deionized water and ethanol, and dried at 100°C for 2 hours, and finally the dried powder was calcined in a muffle furnace at 700°C for 4 hours to obtain a light yellow powdery nickel tungstate sample .

[0029] (2) Preparation of cadmium sulfide / nickel tungstate composite photocatalyst: Weigh 0.1g nickel tungstate and add it to 70ml ethylene glycol, stir magnetically for 1h, then add 0.036864g cadmium acetate, continue ultrasonication for 1h, then add 0.0104g s...

Embodiment 3

[0031] (1) Preparation of nickel tungstate: add 0.33g of nickel nitrate and 0.291g of sodium tungstate into 30ml of deionized water respectively, and stir magnetically for 2 hours to obtain a homogeneous solution. Then the sodium tungstate solution was added dropwise to the nickel nitrate solution, and the stirring was continued for 2 hours. Then, the obtained mixed solution was transferred to a 100ml reactor, and reacted hydrothermally at 180°C for 16 hours. The obtained product was centrifuged and washed 3 times with deionized water and ethanol, and dried at 100°C for 2 hours, and finally the dried powder was calcined in a muffle furnace at 700°C for 4 hours to obtain a light yellow powdery nickel tungstate sample .

[0032] (2) Preparation of cadmium sulfide / nickel tungstate composite photocatalyst: Weigh 0.1g nickel tungstate and add it to 70ml ethylene glycol, stir magnetically for 1h, then add 0.055296g cadmium acetate, continue ultrasonication for 1h, then add 0.0156g s...

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Abstract

A cadmium sulfide / nickel tungstate composite visible light catalyst, a preparation method and an application thereof belong to the technical field of semiconductor photocatalytic nanomaterials. The invention provides a preparation method of a cadmium sulfide / nickel tungstate composite visible light catalyst. The method of the present invention constructs NiWO 4 The heterostructure with CdS retains the redox ability of the material, inhibits the recombination of photogenerated carriers, effectively enhances the photocatalytic activity of the composite material, and makes it exhibit superior photocatalytic activity under visible light irradiation.

Description

technical field [0001] The invention belongs to the technical field of semiconductor photocatalytic nanomaterials, and in particular relates to the preparation and application of a cadmium sulfide / nickel tungstate composite visible light catalyst. Background technique [0002] Photocatalytic technology has great application prospects to alleviate energy depletion and ecological environment damage by producing renewable fuels, degrading and mineralizing toxic pollutants. On the one hand, the use of semiconductor photocatalytic materials can convert low-density solar energy into high-density chemical energy (photocatalytic water splitting to produce hydrogen) or electrical energy (dye-sensitized solar cells); Redox activity of electrons and holes for treatment of industrial wastewater and organic pollutants. [0003] Cadmium sulfide (CdS) is a typical direct-bandgap narrow-bandgap semiconductor material in the II-VI group. The bandgap width of bulk CdS is 2.42eV at room tempe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/049C02F1/30C02F101/30C02F101/38
CPCB01J35/004B01J27/049C02F1/30C02F2101/308C02F2101/38C02F2305/10
Inventor 王安慰万玉山
Owner CHANGZHOU UNIV
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