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Photo-degradation reactor based on graphite phase carbon nitride film and preparation method thereof

A graphite phase carbon nitride and photodegradation technology, which is applied in chemical instruments and methods, nitrogen and non-metallic compounds, chemical/physical processes, etc., can solve the problems of continuous flow degradation of water, etc., and achieve comprehensive performance of green environmental protection, The effect of increasing the contact area and efficient handling

Active Publication Date: 2016-05-11
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the problem that the existing two-dimensional carbon nitride dispersion liquid cannot realize continuous flow degradation of water when it is used for photodegradation, and to provide a photodegradation reaction of graphite phase carbon nitride film that continuously flows and degrades organic dyes under visible light device and its preparation method

Method used

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  • Photo-degradation reactor based on graphite phase carbon nitride film and preparation method thereof
  • Photo-degradation reactor based on graphite phase carbon nitride film and preparation method thereof
  • Photo-degradation reactor based on graphite phase carbon nitride film and preparation method thereof

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Embodiment 1

[0032] Step 1, using a mixed solvent of isopropanol / water with a volume ratio of 1:0.5 as a dispersion liquid, adding graphite phase carbon nitride solids, and ultrasonically dispersing for 12 hours to form a 1g / L carbon nitride dispersion liquid;

[0033] Step 2, centrifuging the above-mentioned dispersion liquid after ultrasonic dispersion at 500 rpm for 15 min;

[0034] Step 3, discarding the lower sediment after centrifugation, leaving the upper liquid;

[0035] Step 4, centrifuge the upper layer liquid in step 3 again at 2500rpm for 15min, take the upper layer liquid, and obtain the two-dimensional structure graphite phase carbon nitride dispersion liquid, the atomic force height diagram of the two-dimensional structure graphite phase carbon nitride is as follows figure 2 shown;

[0036] Step 5, taking out the two-dimensional structure graphite phase carbon nitride dispersion in step 4, and diluting it to 0.5g / L;

[0037] Step 6, the dilution solution in step 5 is depo...

Embodiment 2

[0041] Step 1, using a mixed solvent of isopropanol / water with a volume ratio of 1:1 as a dispersion liquid, adding graphite phase carbon nitride solids, and ultrasonically dispersing for 10 hours to form a 3g / L carbon nitride dispersion liquid;

[0042] Step 2, centrifuging the above-mentioned dispersion liquid after ultrasonic dispersion at 1500 rpm for 5 min;

[0043] Step 3, discarding the lower sediment after centrifugation, leaving the upper liquid;

[0044] Step 4, centrifuging the upper layer liquid in step 3 again at 3500rpm for 5min, and taking the upper layer liquid to obtain a two-dimensional graphite phase carbon nitride dispersion;

[0045] Step 5, taking out the two-dimensional structure graphite phase carbon nitride dispersion in step 4, and diluting it to 0.3g / L;

[0046]Step 6, depositing the diluent in step 5 on the supporting membrane to obtain a graphitic phase carbon nitride film photodegradation reactor with a thickness of 1 μm.

Embodiment 3

[0048] Step 1, using a mixed solvent of isopropanol / water with a volume ratio of 1:3 as a dispersion liquid, adding graphite phase carbon nitride solids, and ultrasonically dispersing for 5 hours to form a 5g / L carbon nitride dispersion liquid;

[0049] Step 2, centrifuging the above-mentioned dispersion liquid after ultrasonic dispersion at 1000 rpm for 10 min;

[0050] Step 3, discarding the lower sediment after centrifugation, leaving the upper liquid;

[0051] Step 4, centrifuge the upper layer liquid in step 3 again at 3000rpm for 10min, take the upper layer liquid, and obtain the two-dimensional graphite phase carbon nitride dispersion;

[0052] Step 5, taking out the two-dimensional structure graphite phase carbon nitride dispersion in step 4, and diluting it to 0.05g / L;

[0053] Step 6, depositing the diluent in step 5 on the supporting membrane to obtain a photodegradation reactor of graphite phase carbon nitride film with a thickness of 0.8 μm.

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Abstract

The invention discloses a photo-degradation reactor based on graphite phase carbon nitride film and a preparation method thereof. The photo-degradation reactor is obtained by using blocky graphite phase carbon nitride as a precursor material, carrying out liquid phase stripping to obtain two-dimensional graphite phase carbon nitride, and carrying layer-by-layer assembly. A traditional dispersant stirring photo-degradation mode is changed into a film reactor mode, implementing continuous flow degradation of organic dye wastewater and directly acquiring a flow phase free of organic dye molecules; the photo-degradation reactor prepared by the invention has intercepting and degrading functions and is efficient in treating organic dye wastewater.

Description

technical field [0001] The invention relates to a visible light degradation reactor based on graphite-phase carbon nitride film, which belongs to the technical field of inorganic material preparation. Background technique [0002] The printing and dyeing industry produces a large amount of organic pollutants that are discharged with wastewater, causing serious water pollution problems. [0003] These organic dyes have great biological toxicity and have great carcinogenic effect. Therefore, how to degrade organic dyes into non-toxic and harmless substances with high efficiency and low consumption has become an urgent problem to be solved in the treatment of dye industry wastewater. [0004] The photooxidative catalytic degradation process driven by light is usually used to degrade organic dyes, in which titanium dioxide nanoparticles are used as catalysts with high degradation efficiency, non-toxicity, low price and stable chemical properties. However, titanium dioxide only...

Claims

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Application Information

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IPC IPC(8): C02F1/30B01J27/24C01B21/082C02F101/30
CPCC01B21/082C02F1/30B01J27/24C02F2101/308
Inventor 周凯歌
Owner NANJING UNIV OF TECH