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Preparation method of nickel phosphide cocatalyst by photodeposition on cadmium sulfide

A co-catalyst and cadmium sulfide technology, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as hindering large-scale application, harsh experimental conditions, and complicated preparation methods, and achieve the goal of improving visible light. Catalytic activity, simple preparation method, and the effect of inhibiting recombination

Inactive Publication Date: 2020-02-21
HARBIN INST OF TECH AT WEIHAI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Platinum is currently the most efficient co-catalyst, but its high price and scarcity hinder its large-scale application
Recently, transition metal phosphides have been proved to have high catalytic activity for hydrogen production, but their preparation methods are complicated and the experimental conditions are harsh. method is significant

Method used

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  • Preparation method of nickel phosphide cocatalyst by photodeposition on cadmium sulfide
  • Preparation method of nickel phosphide cocatalyst by photodeposition on cadmium sulfide
  • Preparation method of nickel phosphide cocatalyst by photodeposition on cadmium sulfide

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preparation example Construction

[0018] A preparation method for photodepositing nickel phosphide cocatalyst on cadmium sulfide, comprising the following steps:

[0019] (1) Preparation of cadmium sulfide nanosheets: Dissolve 0.183g cadmium chloride and 0.16g sulfur powder in 30ml diethylenetriamine, stir evenly for 30 minutes and transfer it to the high pressure of 50ml polytetrafluoroethylene liner kettle, and heated at 80°C for 48 hours, after natural cooling, fully cleaned with deionized water and ethanol, and dried at 60°C to obtain cadmium sulfide nanosheets;

[0020] (2) Preparation of cadmium sulfide nanosheets / nickel phosphide: the cadmium sulfide nanosheets in step (1) are configured into a cadmium sulfide solution, and the cadmium sulfide solution is added to the aqueous solution containing nickel chloride and sodium hypophosphite, and The mixed solution is transferred into a reactor, and after the oxygen in the solution is extracted, it is irradiated with a simulated sunlight light source to obtai...

Embodiment 1

[0024] Dissolve 0.183g of cadmium chloride and 0.16g of sulfur powder in 30ml of diethylenetriamine, stir evenly for 30 minutes, transfer it to an autoclave with a 50ml polytetrafluoroethylene liner, and heat at 80°C for 48 hours, After natural cooling, fully wash with deionized water and ethanol, and dry at 60°C to obtain cadmium sulfide nanosheets, which are designated as cadmium sulfide-1 photocatalyst.

Embodiment 2

[0026] Dissolve 0.183g of cadmium chloride and 0.16g of sulfur powder in 30ml of diethylenetriamine, stir evenly for 30 minutes, transfer it to an autoclave with a 50ml polytetrafluoroethylene liner, and heat at 80°C for 48 hours, After natural cooling, fully wash with deionized water and ethanol, and dry at 60°C to obtain cadmium sulfide nanosheets.

[0027] Ultrasonic disperse 0.02g of cadmium sulfide nanosheets into 20ml of deionized water, disperse 0.019g of nickel chloride and 0.059g of sodium hypophosphite into 15ml of deionized water respectively, and mix them with cadmium sulfide aqueous solution to turn them into photocatalytically active In the reactor of the fully automatic online evaluation system, use a mechanical pump to empty the air in the reactor and use a 300-watt xenon lamp as the light source to photodeposit nickel phosphide for 5 minutes to obtain cadmium sulfide / nickel phosphide-2 photocatalyst .

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Abstract

The invention discloses a preparation method of a nickel phosphide cocatalyst by photodeposition on cadmium sulfide, and the method comprises the following steps: fully dissolving cadmium chloride andsulfur powder in diethylenetriamine, heating in a high-pressure reaction kettle at 80 DEG C for 48 hours, naturally cooling, and cleaning to obtain a cadmium sulfide nanosheet; preparing the cadmiumsulfide nanosheet into a cadmium sulfide solution, adding the cadmium sulfide solution into an aqueous solution containing nickel chloride and sodium hypophosphite, extracting oxygen in the solution,and irradiating by using a simulated sunlight source to obtain the cadmium sulfide / nickel phosphide visible-light-driven photocatalyst. According to the invention, the nickel phosphide cocatalyst is loaded on the surface of the cadmium sulfide nanosheet by adopting a photochemical reduction method, and the deposition amount of nickel phosphide is adjusted by utilizing illumination time, so that the preparation method has the advantages of simplicity, rapidness, high efficiency, low cost and the like. The hydrogen production efficiency of the cadmium sulfide / nickel phosphide photocatalyst undervisible light excitation reaches 28.7 mmol g <-1 > h <-1 >, and the activity of the cadmium sulfide / nickel phosphide photocatalyst is 3.9 times of the activity of cadmium sulfide.

Description

technical field [0001] The invention belongs to the technical field of preparation and application of visible light catalytic materials, and in particular relates to a preparation method for photodepositing nickel phosphide co-catalysts on cadmium sulfide. Background technique [0002] In recent years, a large number of fossil fuel applications have led to global energy shortages and environmental pollution, which puts forward urgent requirements for the development of clean energy. Photocatalytic hydrogen production technology utilizes electron-hole pairs generated by semiconductor materials to absorb sunlight to decompose water molecules into hydrogen and oxygen, thus perfectly solving the above-mentioned energy shortage and environmental pollution problems. In the photocatalytic hydrogen production technology, cadmium sulfide is the most effective visible light catalyst, but there are also problems such as serious carrier recombination and photocorrosion. Therefore, it is...

Claims

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Application Information

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IPC IPC(8): B01J27/185B01J27/04B01J37/34C01B3/04
CPCB01J27/1853B01J27/04B01J37/344C01B3/042B01J35/23B01J35/39Y02E60/36
Inventor 任守田盖琪晓
Owner HARBIN INST OF TECH AT WEIHAI
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