Iron-doped modified carbon nitride photocatalyst, and preparation method and application thereof

An iron doping and catalyst technology, applied in the field of photocatalysis, can solve the problems of low photocatalytic activity of barbituric acid modified carbonized nitrogen, high requirements for organic solvent equipment, and complicated modification methods, so as to promote carrier transport , improve photocatalytic activity, and facilitate large-scale production

Inactive Publication Date: 2018-05-01
INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the photocatalytic activity of barbituric acid modified carbonized nitrogen is still low
[0004] In view of the shortcomings of the current carbon nitride photocatalysts such as low photocatalytic activity, complex modification metho

Method used

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  • Iron-doped modified carbon nitride photocatalyst, and preparation method and application thereof
  • Iron-doped modified carbon nitride photocatalyst, and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0028] A kind of iron-doped modified carbon nitride photocatalyst, its preparation method is as follows:

[0029] Take by weighing 10g dicyandiamide, 0.2g barbituric acid, 5g Fe (NO 3 ) 3 (The mass ratio of the three is 100:2:50) Dissolve in 50ml of deionized water, heat and stir at 60°C to speed up the dissolution, and make it evenly dispersed in water; put the above mixed solution in a blast drying oven, and dry at 100°C Dry for 5 hours to obtain a white mixture powder; calcinate the mixed powder in a muffle furnace at a heating rate of 5°C / min, raise it to 550°C and keep it for 2 hours to obtain the above-mentioned iron-doped modified carbon nitride composite light catalyst. And apply it to photocatalytic degradation of phenol solution degradation results see attached figure 2 .

Embodiment 2

[0031] A kind of iron-doped modified carbon nitride photocatalyst, its preparation method is as follows:

[0032] Weigh 10g dicyandiamide, 0.15g barbituric acid, 1g FeCl 3 (The mass ratio of the three is 100:1.5:10) Dissolve in 50ml of deionized water, heat and stir at 60°C to speed up the dissolution, and make it evenly dispersed in water; put the above mixed solution in a blast drying oven, and dry at 100°C Dry for 5 hours to obtain a white mixture powder; calcinate the mixed powder in a muffle furnace at a heating rate of 5°C / min, raise the temperature to 550°C and keep it for 2 hours to obtain the above-mentioned iron-doped carbon nitride composite photocatalyst. And apply it to photocatalytic degradation of phenol solution degradation results see attached figure 2 .

Embodiment 3

[0034] A kind of iron-doped modified carbon nitride photocatalyst, its preparation method is as follows:

[0035] Weigh 5g dicyandiamide, 0.1g barbituric acid, 0.5g Fe (NO 3 ) 3 (The mass ratio of the three is 5:0.1:0.5) Dissolve in 50ml of deionized water, heat and stir at 60°C to speed up the dissolution, and make it evenly dispersed in water; put the above mixed solution in a blast drying oven, and dry at 100°C Dry for 5 hours to obtain a white mixture powder; calcinate the mixed powder in a tube furnace at a heating rate of 5°C / min, raise it to 550°C and keep it for 3 hours to obtain the above-mentioned iron-doped modified carbon nitride composite light catalyst. And apply it to photocatalytic degradation of phenol solution degradation results see attached figure 2 .

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Abstract

The invention relates to an iron-doped modified carbon nitride photocatalyst, and a preparation method and an application thereof. The preparation method for the iron-doped modified carbon nitride photocatalyst comprises the following steps: uniformly dispersing dicyandiamide, barbituric acid and iron salt in water so as to obtain a mixed solution, then drying the mixed solution, and carrying outcalcination so as to obtain the iron-doped modified carbon nitride photocatalyst, wherein the mass ratio of the dicyandiamide to the barbituric acid to the iron salt is (0.1-100): (0.01-10): (0.01-10). According to the invention, the barbituric acid is selected for modification of carbon nitride, a nitrogen vacancy defect is generated in a carbon nitride structure, and transmission of a charge carrier is promoted; iron doped carbon nitride is stronger in absorption of visible light, so photocatalytic activity is further improved. The preparation method provided by the invention has the advantages of simple operation, no need of using an organic solvent, environmental protection, convenience, low requirements for equipment, and facilitation of large-scale production; and the iron-doped modified carbon nitride photocatalyst prepared by using the preparation method provided by the invention has strong photocatalytic activity to high-concentration phenol, and can be directly applied to treatment of industrial wastewater.

Description

technical field [0001] The invention relates to the technical field of photocatalysis, in particular to the preparation of an iron-doped modified carbon nitride photocatalyst and its preparation method and application. Background technique [0002] With the enhancement of human society's awareness of environmental protection and the improvement of environmental protection requirements, the discharge requirements of industrial wastewater are becoming more and more stringent. The treatment of phenolic wastewater has always been a difficult problem for printing and dyeing enterprises. Take phenol as an example. Phenol is a commonly used production raw material in the modern chemical industry. It has the characteristics of high toxicity, stable structure and difficult to decompose. It is one of the most residual and most toxic organic pollutants in wastewater treatment. [0003] Carbon nitride is a new type of semiconductor photocatalyst that has attracted much attention in rece...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30
CPCB01J27/24B01J35/004C02F1/30C02F2305/10
Inventor 陈志鸿王新马歌吕海钦
Owner INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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