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G-C3N4 photoelectric catalyst and preparation method thereof

A catalyst, g-c3n4 technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of complex preparation, low catalytic efficiency, and difficult recovery of photoelectric catalysts, and achieve simple preparation, Good catalytic effect, inhibition of recombination effect

Inactive Publication Date: 2017-07-07
HUIZHOU RES INST OF SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved in the present invention is to overcome traditional g-C 3 N 4 To solve the problems of difficult photocatalyst recovery, low catalytic efficiency, and complicated preparation, provide a simple, efficient, environmentally friendly, good catalytic effect, and easy-to-recycle photocatalyst

Method used

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  • G-C3N4 photoelectric catalyst and preparation method thereof
  • G-C3N4 photoelectric catalyst and preparation method thereof
  • G-C3N4 photoelectric catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] a g-C 3 N 4 The photocatalyst is prepared by the following steps:

[0023] S1. Transfer 20 ml of the prepared melamine (6 g / L) acetic acid solution to a two-electrode system, with a carbon rod as the cathode, and a 1×2 cm 2 The FTO conductive glass used as the anode was electroplated with the HDV-7C transistor potentiostat under the conditions of the temperature of the electroplating solution at 50 °C, the constant current at -0.5 mA, and the time of 60 min to obtain elemental melamine.

[0024] S2. Calcining the prepared melamine in a tube furnace at a temperature of 550 °C for 4 h, VN 2 / O 2 =4:1 to get the g-C 3 N 4 photocatalyst.

[0025] The g-C prepared in embodiment 1 3 N 4 Photoelectrocatalytic oxygen evolution map and SEM image figure 1 , the figure illustrates that our prepared g-C 3 N 4 It is in the form of nanoparticles and has good photoelectric catalytic oxygen evolution performance, and is an important catalytic material for photoelectric catal...

Embodiment 2

[0027] a g-C 3 N 4 The photocatalyst is prepared by the following steps:

[0028] S1. Transfer 20 ml of the prepared melamine (6 g / L) acetic acid solution to a two-electrode system, with a carbon rod as the cathode, and a 1×2 cm 2 The FTO conductive glass used as the anode was electroplated with the HDV-7C transistor potentiostat under the conditions of the temperature of the electroplating solution at 30 °C, the constant current of -0.5 mA, and the time of 30 min to obtain elemental melamine.

[0029] S2. Calcining the prepared melamine in a tube furnace at a temperature of 550 °C for 2 h, VN 2 / O 2 =4:1 to get the g-C 3 N 4 photocatalyst.

Embodiment 3

[0031] a g-C 3 N 4 The photocatalyst is prepared by the following steps:

[0032] S1. Transfer 20 ml of the prepared melamine (6 g / L) acetic acid solution to a two-electrode system, with a carbon rod as the cathode, and a 1×2 cm 2 The FTO conductive glass used as the anode was electroplated with a HDV-7C transistor potentiostat under the conditions of the temperature of the electroplating solution at 30 °C, the constant current at -2 mA, and the time of 60 min to obtain elemental melamine.

[0033] S2. Calcining the prepared melamine in a tube furnace at a temperature of 300 °C for 4 h, VN 2 / O 2 =2:1 to get the g-C 3 N 4 photocatalyst.

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Abstract

The invention discloses a g-C3N4 photoelectric catalyst and a preparation method thereof. The preparation method comprises the following steps: (S1) preparing electroplating liquid from an amine substance and acetic acid, and carrying out electroplating by taking FTO conductive glass as a substrate under a continuous current condition, so as to obtain the amine substance; and (S2) preparing the g-C3N4 photoelectric catalyst by taking the amine substance, adopting the FTO conductive glass as the substrate, as a precursor under a calcination condition. By utilizing the g-C3N4 photoelectric catalyst, the compounding of photo-induced electrons and electron holes can be effectively inhibited, so that the photoelectrocatalysis oxygen evolution efficiency is substantially improved. According to an electrochemical method of the g-C3N4 photoelectric catalyst, the FTO conductive glass is taken as the substrate so as to prepare the amine substance, and the g-C3N4 photoelectric catalyst is prepared under the calcination condition; the electrochemical method has the characteristics that the g-C3N4 photoelectric catalyst is easy to recycle and simple and convenient to prepare. The prepared g-C3N4 photoelectric catalyst is efficient, environment-friendly and easy to recycle and has a good catalytic effect.

Description

technical field [0001] The present invention relates to g-C 3 N 4 The technical field of photocatalysts, more specifically, relates to a new type of highly efficient g-C 3 N 4 Preparation method of photocatalyst and its application. Background technique [0002] With the rapid development of modern society, advanced oxidation technology is changing people's living environment day by day, especially the photoelectric catalytic oxidation technology has aroused people's general attention. Photocatalytic oxidation technology is a new technology developed recently. It combines photocatalysis and electrocatalysis to effectively overcome the recombination of photogenerated electrons and holes in photocatalysis, increase the density of photocarriers, and enhance its catalytic efficiency. . Photoelectric catalytic oxidation technology can not only convert clean energy water into oxygen, but also mineralize organic pollutants into non-toxic and harmless carbon dioxide and water. ...

Claims

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Application Information

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IPC IPC(8): B01J27/24
CPCB01J27/24B01J35/33B01J35/39
Inventor 纪红兵黄勇潮范文杰邱伟涛童叶翔
Owner HUIZHOU RES INST OF SUN YAT SEN UNIV
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