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Method for preparing graphite-phase carbon nitride film electrode through spray thermal polymerization

A graphite phase carbon nitride, thin film electrode technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of inferior electrical conductivity as the substrate itself, reduced electron transport ability, uneven carbon nitride film, etc., to improve the electronic Conductivity, broadening the photoresponse range, reducing the effect of the band gap

Pending Publication Date: 2021-11-19
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example: Patent CN201710617988.X mentions a preparation method of graphite-phase carbon nitride film electrode. First, carbon nitride is prepared by using a precursor rich in melamine, and then the carbon nitride is dissolved in a solvent and then coated on However, the preparation process of this method is cumbersome, and the prepared carbon nitride film often has problems such as inhomogeneity and poor bonding with the substrate.
[0004] Patent CN201910399396.4 also mentions a method for preparing graphite-phase carbon nitride film electrodes. In this method, the substrate and the precursor are co-coated and calcined, so that the surface of the substrate will be completely deposited on the carbon nitride film. Due to the nitrogen The conductivity of carbonized carbon is far inferior to that of the substrate itself, and the contact between the substrate without a blank area and the electrode holder will reduce the ability of electron transport

Method used

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  • Method for preparing graphite-phase carbon nitride film electrode through spray thermal polymerization
  • Method for preparing graphite-phase carbon nitride film electrode through spray thermal polymerization
  • Method for preparing graphite-phase carbon nitride film electrode through spray thermal polymerization

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Embodiment 1

[0027] A method for preparing graphite phase carbon nitride film electrodes by spray thermal polymerization, the specific steps are as follows:

[0028] (1) Put dicyandiamide in a mortar and grind it into powder at room temperature, and then put it in an oven at 50°C for 24 hours to remove the moisture in dicyandiamide. 5g of dicyandiamide was dissolved in 1L of deionized water, and stirred for 100min to obtain a precursor solution;

[0029] (2) Place the electrode base FTO flat on the upper nozzle of the vertical tube furnace, adjust the exposed area of ​​the electrode substrate FTO in the nozzle to be a square of 1cm*1cm, and cover the beaker above the nozzle to seal;

[0030] (3) Inject the precursor solution in step (1) into the ultrasonic atomizer, connect the atomization port to the lower end of the vertical tube furnace, set and wait for the temperature in the heating zone of the tube furnace to rise to 650°C;

[0031] (4) At a temperature of 650°C, turn on the ultraso...

Embodiment 2

[0035] A method for preparing graphite phase carbon nitride film electrodes by spray thermal polymerization, the specific steps are as follows:

[0036] (1) Put the urea in a mortar and grind it into powder at room temperature, then put it in an oven at 50°C for 24 hours to remove the moisture in the urea, and take 10g of the ground and dried urea while stirring Dissolve in 1L deionized water, stir for 5 minutes to obtain a precursor solution;

[0037] (2) Place the electrode base quartz glass sheet flatly on the outlet end of the horizontal tube furnace, adjust the exposed area of ​​the electrode base quartz glass sheet in the nozzle to be a square of 5cm*5cm, and cover the beaker on the nozzle to seal;

[0038] (3) Inject the precursor solution in step (1) into the mesh atomizer, connect the atomization port to the inlet end of the horizontal tube furnace, set and wait for the temperature in the heating zone of the tube furnace to rise to 800°C;

[0039] (4) At a temperatur...

Embodiment 3

[0042] A method for preparing graphite phase carbon nitride film electrodes by spray thermal polymerization, the specific steps are as follows:

[0043] (1) Put melamine in a mortar and grind it fully into powder at room temperature, and then put it in an oven at 50°C for 24 hours to remove the moisture in melamine. Under the condition of stirring, take 0.1 g was dissolved in 1L deionized water, and stirred for 100 minutes to obtain a precursor solution;

[0044] (2) Place the electrode base FTO flatly on the upper nozzle of the vertical tube furnace, adjust the exposed area of ​​the electrode substrate FTO at the nozzle to be a square of 2cm*2cm, and cover the beaker above the nozzle to seal;

[0045] (3) Inject the precursor solution in step (1) into the compression atomizer, connect the atomization port to the lower end of the vertical tube furnace, set and wait for the temperature in the heating zone of the tube furnace to rise to 550°C;

[0046] (4) At a temperature of 5...

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Abstract

The invention discloses a method for preparing a graphite-phase carbon nitride film electrode through spray thermal polymerization. The method comprises the following steps: grinding a precursor rich in carbon and nitrogen, drying, and stirring and dissolving in deionized water to obtain a precursor solution; placing an electrode substrate at an outlet of a heating furnace, and sealing; and injecting the precursor solution into an atomizer, starting the atomizer, controlling the atomization speed, connecting an atomization opening to the inlet of the heating furnace, carrying out heat treatment on atomized micro-droplets through the heating furnace, and depositing a film electrode of graphite phase carbon nitride on the electrode substrate. According to the invention, the purpose of controlling the thickness of the film can be achieved by adjusting the concentration and dosage of the precursor solution, the method is simple and convenient and has certain universality, and the carbon nitride film can be deposited on different substrates; and the prepared graphite-phase carbon nitride can modify the structure of carbon nitride, widen the light response range and reduce the forbidden band width to achieve a better optical effect.

Description

technical field [0001] The invention relates to a method for preparing a graphite-phase carbon nitride film electrode, which belongs to the technical field of photoelectrochemistry and film preparation, and in particular to a method for preparing a graphite-phase carbon nitride film electrode by spray thermal polymerization. Background technique [0002] Graphite carbon nitride is a new type of organic semiconductor material composed of three-s-triazine structural units. Its forbidden band width is about 2.7eV, and it is easy to adjust the band gap. It is very suitable for the research of photocatalytic water splitting. The stability, low cost and other properties make it a promising candidate photoanode material. [0003] Carbon nitride is generally produced by calcination of organic precursors rich in carbon and nitrogen. For example: Patent CN201710617988.X mentions a preparation method of graphite-phase carbon nitride film electrode. First, carbon nitride is prepared by...

Claims

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Application Information

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IPC IPC(8): C25B1/04C25B1/55C25B11/052C25B11/087C25B11/085
CPCC25B1/04C25B1/55C25B11/052C25B11/087C25B11/085Y02E60/36
Inventor 鲍瑞伍锐易健宏
Owner KUNMING UNIV OF SCI & TECH
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