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Preparation method of g-C3N4 composite film material for photoelectrocatalysis

A composite film, photoelectric catalysis technology, applied in catalyst activation/preparation, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as Eg increase and limitation

Pending Publication Date: 2020-10-30
TIANJIN CHENGJIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reduction of the quantum confinement effect (QCE) and the conjugate length lead to 2D g-C 3 N 4 The greatly increased Eg of nanosheets and their tendency to agglomerate limit their applications

Method used

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  • Preparation method of g-C3N4 composite film material for photoelectrocatalysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A g-C for photocatalysis 3 N 4 The preparation method of composite film material, comprises the steps:

[0020] (1) Add 8g of dicyandiamide to 100mL of water under constant stirring, and then keep at 180°C for 4h by hydrothermal reaction. Cool the prepared solution to room temperature, centrifuge to obtain a white powder, dry it in a freezer for 20 h, take 6g of the powder and fill it into a 60×90mm ark, and press the FTO conductive glass on the ark with the conductive side facing down. transferred to a muffle furnace for processing, heated to 600 °C at a heating rate of 2 °C / min, kept for 4 h, and cooled to room temperature. You can get g-C with a rod-like structure attached to the FTO conductive glass 3 N 4 film.

[0021] (2) 0.48g Bi(NO 3 ) 3 ·5H 2 O was dissolved in 20 mL of ethylene glycol, and 0.48 g of Na 2 S·9H 2 O was dissolved in 20 mL of deionized water, and the two solutions were magnetically stirred for 0.5 h. Then immerse the sample prepared in ...

Embodiment 2

[0024] A g-C for photocatalysis 3 N 4 The preparation method of composite film material, comprises the steps:

[0025] (1) Add 5g of dicyandiamide to 100mL of water under constant stirring, and then keep at 180°C for 4h by hydrothermal reaction. Cool the prepared solution to room temperature, centrifuge to obtain a white powder, dry it in a freezer for 24 h, take 3 g of the powder and fill it into a 5 ml crucible, cover and press the FTO conductive glass on the crucible with the conductive side facing down, transfer It was processed in a muffle furnace, heated to 550°C at a heating rate of 2°C / min, then kept for 4 hours, and then cooled to room temperature. You can get g-C with a rod-like structure attached to the FTO conductive glass 3 N 4 film.

[0026] (2) 0.48g Bi(NO 3 ) 3 ·5H 2 O was dissolved in 20 mL of ethylene glycol, and 0.48 g of Na 2 S·9H 2 O was dissolved in 20 mL of deionized water, and the two solutions were magnetically stirred for 0.5 h. Then immerse ...

Embodiment 3

[0029] A g-C for photocatalysis 3 N 4 The preparation method of composite film material, comprises the steps:

[0030] (1) 6g of dicyandiamide was added to 100mL of water under constant stirring, and then kept at 180°C for 4h by hydrothermal reaction. Cool the prepared solution to room temperature, centrifuge to obtain a white powder, dry it in a freezer for 18 h, take 4 g of powder and fill it into a 5 ml crucible, cover and press the FTO conductive glass on the crucible with the conductive side facing down, transfer It was processed in a muffle furnace, heated to 600°C at a heating rate of 2°C / min, then kept for 4 hours, and then cooled to room temperature. You can get g-C with a rod-like structure attached to the FTO conductive glass 3 N 4 film.

[0031] (2) 0.48g Bi(NO 3 ) 3 ·5H 2 O was dissolved in 20 mL of ethylene glycol, and 0.48 g of Na 2 S·9H 2 O was dissolved in 20 mL of deionized water, and the two solutions were magnetically stirred for 0.5 h. Then imme...

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Abstract

The invention discloses a preparation method of a g-C3N4 composite film material for photoelectrocatalysis. The method comprises the steps: firstly, preparing a g-C3N4 film by adopting a hydrothermalmethod and a hot vapor liquid polymerization method; then, Bi2S3 nanoparticles are loaded on the g-C3N4 film by adopting a continuous ionic layer adsorption method (SILAR); and finally, Co-Pi nanoparticles are deposited on the g-C3N4 / Bi2S3 through a photoelectrochemical deposition method, and finally the g-C3N4 / Bi2S3 / Co-Pi film composite material is obtained. According to the prepared composite film material, the visible light absorption of g-C3N4 is improved, and the improvement of the photoelectrocatalysis performance is promoted; the preparation method is simple and easy to operate and lowin overall cost.

Description

technical field [0001] The invention belongs to the technical field of preparation of photoelectrocatalytic thin film materials, in particular to a g-C material used for photoelectrocatalysis 3 N 4 The preparation method of composite film material. Background technique [0002] Since 1972, Japanese scholars Fujishima and Honda reported TiO 2 Since photoelectrodes are used as photoelectrocatalytic materials, photoelectrocatalysis (PEC) based on semiconductor photoelectrodes is a key technology to directly convert solar energy into chemical energy that can be stored and is expected to alleviate the growing energy crisis and related environmental problems, which has attracted worldwide attention. world research interests. TiO 2 Due to its excellent stability, availability, non-toxicity and low price, TiO 2 It has become a traditional photoanode material for photocatalysis. However, due to its wide bandgap of 3.2eV, it absorbs only 4% of the ultraviolet light that accounts...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/00B01J37/02B01J37/08B01J37/10B01J37/34
CPCB01J37/348B01J37/344B01J37/02B01J37/10B01J37/08B01J27/24B01J35/39B01J35/33
Inventor 刘志锋钱红霞贾小丽
Owner TIANJIN CHENGJIAN UNIV
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