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Carbon nitride/alpha iron oxide catalyst, photoelectric auxiliary Fenton system and application thereof to organic wastewater treatment

A catalyst and carbon nitride technology, which is applied in the direction of oxidation water/sewage treatment, water/sewage treatment, special compound water treatment, etc., can solve the problems of low power generation efficiency, high amplification cost, unfavorable promotion, etc., and achieve low metal dissolution , reduce energy consumption, and accelerate the transmission of electrons

Active Publication Date: 2018-08-28
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, light and electricity can be introduced as auxiliary means into the advanced oxidation technology based on sulfate radicals, which can further improve the processing efficiency of this technology. However, if the introduction of ultraviolet light and an external power supply will greatly increase the energy consumption of the entire system, Not conducive to its promotion in practice
[0004] Microbial fuel cells use the anaerobic metabolism of electrogenic bacteria to convert chemical energy into electrical energy. It is considered to be a sustainable and green electricity generation technology with great development prospects, but it still faces bottlenecks such as low electricity production efficiency and high amplification costs.

Method used

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  • Carbon nitride/alpha iron oxide catalyst, photoelectric auxiliary Fenton system and application thereof to organic wastewater treatment
  • Carbon nitride/alpha iron oxide catalyst, photoelectric auxiliary Fenton system and application thereof to organic wastewater treatment
  • Carbon nitride/alpha iron oxide catalyst, photoelectric auxiliary Fenton system and application thereof to organic wastewater treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A carbon nitride / α-type iron oxide catalyst, its preparation method comprises the steps:

[0043] 1) 2.0g Fe(NO 3 ) 3 9H 2 O was dissolved in 100mL of N,N-dimethylformamide, then 5.0g of melamine was added, and stirred evenly to obtain a mixed solution;

[0044] 2) Put the obtained mixed solution in an oven and dry at 80°C for 24 hours, then transfer the dried sample into a 50mL porcelain crucible, cover it and place it in a muffle furnace, and raise the temperature to 520°C at a rate of 3°C / min And keep it warm for 2 hours. After the temperature in the furnace drops to room temperature, take it out and crush it through a 200-mesh sieve to obtain a carbon nitride / α-type iron oxide catalyst (referred to as CNFe).

[0045] The product obtained in this embodiment is subjected to X-ray diffraction analysis, field emission scanning electron microscope analysis, Fourier transform infrared spectroscopy analysis and X-ray photoelectron spectroscopy analysis respectively, the...

Embodiment 2

[0047] A carbon nitride / α-type iron oxide catalyst, its preparation method comprises the steps:

[0048] 1) Add 1.0g Fe(NO 3 ) 3 9H 2 O is dissolved in 100mL ethanol, then add 5.0g melamine, stir to obtain a mixed solution;

[0049] 2) Put the obtained mixed solution in an oven to dry at 90°C for 24 hours, then transfer the dried sample into a 50mL porcelain crucible, cover it and place it in a muffle furnace, and raise the temperature to 520°C at a rate of 5°C / min And keep it warm for 4 hours. After the temperature in the furnace drops to room temperature, take it out and crush it through a 200-mesh sieve to obtain a carbon nitride / α-type iron oxide catalyst (denoted as CNFe1).

Embodiment 3

[0051] A carbon nitride / α-type iron oxide catalyst, its preparation method comprises the steps:

[0052] 1) 4.0g Fe(NO 3 ) 3 9H 2 O is dissolved in 100mL ethanol, then add 5.0g melamine, stir to obtain a mixed solution;

[0053] 2) Put the obtained mixed solution in an oven to dry at 60°C for 24 hours, then transfer the dried sample into a 50mL porcelain crucible, cover it and place it in a muffle furnace, and raise the temperature to 550°C at a rate of 10°C / min And keep it warm for 4 hours. After the temperature in the furnace drops to room temperature, take it out and crush it through a 200-mesh sieve to obtain a carbon nitride / α-type iron oxide catalyst (denoted as CNFe2).

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Abstract

The invention discloses a carbon nitride / alpha iron oxide heterojunction catalyst. The catalyst is combined with visible light, low-voltage bioelectricity and persulfate to construct a photoelectric auxiliary Fenton system, and is used for treating organic wastewater. The carbon nitride / alpha iron oxide catalyst has the advantages of visible-light response and low metal dissolution, forms a photoelectric auxiliary Fenton system taking carbon nitride / alpha iron oxide as a catalyst by being combined with a light source and a bioelectrical activation system, is applied to the treatment of persistent organic pollutant in organic wastewater, can show the advantages of high treatment efficiency, low energy consumption and high convenience in system operation management, and provides a new thought for the technology of organic wastewater treatment.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a carbon nitride / α-type iron oxide catalyst, a photoelectric-assisted Fenton-like system and an application thereof in organic wastewater treatment. Background technique [0002] Bisphenol A is widely used in the manufacture of plastic (milk) bottles, suction cups for children, coatings on the inside of food and beverage (milk powder) cans, etc. Bisphenol A has been detected in food, drinking water, aquatic animals and humans. exist. Bisphenol A is an endocrine disruptor that can cause precocious puberty (especially early exposure) and obesity. level) still poses public health risks after being discharged into receiving water bodies. On the other hand, bisphenol A is stable in nature, and traditional adsorption and biological treatment are often time-consuming, resulting in long sewage residence time and low system treatment efficiency. [0003] The advanc...

Claims

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Application Information

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IPC IPC(8): B01J27/24H01M8/16C02F1/72C02F1/30C02F101/30
CPCH01M8/16C02F1/30C02F1/722C02F1/725B01J27/24C02F2305/026C02F2101/30B01J35/39Y02E60/50
Inventor 张晖严素定石月张鑫萍
Owner WUHAN UNIV
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