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Preparation method of nickel oxide-carbon nitride composite photocatalyst

A carbon nitride, nickel oxide technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of low photocatalytic performance, carrier recombination, and low quantum efficiency, etc. To achieve the effect of simple process, good repeatability, and improved photocatalytic hydrogen production rate

Inactive Publication Date: 2018-11-16
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

But the pure phase g-C 3 N 4 Photocatalysts have inherent defects such as serious carrier recombination and low quantum efficiency, resulting in low photocatalytic performance.

Method used

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  • Preparation method of nickel oxide-carbon nitride composite photocatalyst
  • Preparation method of nickel oxide-carbon nitride composite photocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0021] 1) Fill a corundum crucible with 36g of urea and heat it in an oven at 80°C for 24 hours, then cover it and heat it up to 550°C in a muffle furnace at a rate of 4.6°C / min, and keep it warm for 3 hours. Cooling to room temperature, a yellow powdery solid C 3 N 4 , ready to use after grinding;

[0022] 2) Add 184mg of C to the screw bottle 3 N 4 powder, then add 30mL of tert-butanol, and ultrasonically disperse at 40°C for 0.5h to obtain dispersion A; Stir on the stirrer for 12h to obtain the mixed solution B;

[0023] 3) Preheat a 50mL reactor with a polytetrafluoroethylene liner to 70°C, then quickly transfer the mixed solution B to the polytetrafluoroethylene liner, quickly close the reactor and transfer it to temperature In an oven at 100°C, then set the oven temperature to 210°C, when the temperature rises to the set temperature, start timing, and react at constant temperature for 24 hours;

[0024] 4) After the solvothermal reaction is over, turn off the power...

Embodiment 2

[0026] 1) Fill a corundum crucible with 36g of urea and heat it in an oven at 80°C for 24 hours, then cover it and heat it up to 550°C in a muffle furnace at a rate of 4.6°C / min, and keep it warm for 3 hours. Cooling to room temperature, a yellow powdery solid C 3 N 4 , ready to use after grinding;

[0027] 2) Add 184mg of C to the screw bottle 3 N 4 powder, then add 30mL of tert-butanol, ultrasonically disperse at 40°C for 0.5h to obtain dispersion A; then add 128mg of nickel acetylacetonate to dispersion A, then ultrasonically disperse at 40°C for 0.5h Stir on the stirrer for 12h to obtain the mixed solution B;

[0028] 3) Preheat a 50mL reactor with a polytetrafluoroethylene liner to 70°C, then quickly transfer the mixed solution B to the polytetrafluoroethylene liner, quickly close the reactor and transfer it to temperature In an oven at 100°C, then set the oven temperature to 210°C, when the temperature rises to the set temperature, start timing, and react at constan...

Embodiment 3

[0031] 1) Fill a corundum crucible with 36g of urea and heat it in an oven at 80°C for 24 hours, then cover it and heat it up to 550°C in a muffle furnace at a rate of 4.6°C / min, and keep it warm for 3 hours. Cooling to room temperature, a yellow powdery solid C 3 N 4, ready to use after grinding;

[0032] 2) Add 184mg of C to the screw bottle 3 N 4 powder, then add 30mL of tert-butanol, ultrasonically disperse at 40°C for 0.5h to obtain dispersion A; then add 257mg of nickel acetylacetonate to dispersion A, then ultrasonically disperse at 40°C for 0.5h Stir on the stirrer for 12h to obtain the mixed solution B;

[0033] 3) Preheat a 50mL reactor with a polytetrafluoroethylene liner to 70°C, then quickly transfer the mixed solution B to the polytetrafluoroethylene liner, quickly close the reactor and transfer it to temperature In an oven at 100°C, then set the oven temperature to 210°C, when the temperature rises to the set temperature, start timing, and react at constant...

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Abstract

The invention discloses a preparation method of a nickel oxide-carbon nitride composite photocatalyst. The preparation method comprises the steps: firstly, calcining urea under a certain condition toobtain carbon nitride powder; then, carrying out ultrasonic dispersion at a certain temperature, dispersing the carbon nitride powder into tert-butanol with a certain volume, then, adding a certain amount of nickel acetylacetonate into a mixed solution, and carrying out ultrasonic dispersion and continuous magnetic stirring to obtain a precursor solution; and finally, carrying out a solvothermal reaction on the precursor solution to obtain carbon nitride nanopowder of which the surface is modified with nickel oxide nanoparticles. The preparation method has the advantages that: (1) compared with other methods, the method is simple in process, free of complex equipment and harsh environments and low in cost; (2) the loading amount of the nickel oxide nanoparticles on the surface of carbon nitride can be conveniently controlled by using the method; and (3) the nickel oxide-carbon nitride composite photocatalyst prepared by using the method has excellent photocatalytic hydrogen production,and the hydrogen production amount of the catalyst is obviously increased after the nickel oxide nanoparticles are loaded.

Description

technical field [0001] The invention belongs to the technical field of visible light photocatalyst materials, and in particular relates to a preparation method of a nickel oxide-carbon nitride composite photocatalyst. Background technique [0002] Since humans entered the industrial society, fossil fuels have been widely used in industrial production, releasing a large amount of pollutants during combustion, causing serious impacts on the atmosphere, water sources and other natural environments. At the same time, fossil fuels are non-renewable resources. With the continuous exploitation and utilization, the energy crisis has become an inevitable problem for human beings. In order to solve this problem, the development of pollution-free renewable clean energy has become an inevitable choice. Inspired by photosynthesis in nature, researchers are committed to finding and building efficient photocatalytic materials, and using them to split water into hydrogen and oxygen under s...

Claims

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Application Information

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IPC IPC(8): B01J27/24
CPCB01J27/24B01J35/396B01J35/393B01J35/39
Inventor 尹行天国玉晓谢海霞阙文修
Owner XI AN JIAOTONG UNIV
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