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A photodegradation catalyst for organic sewage treatment and preparation method thereof

A technology of organic sewage and catalyst, applied in the direction of light water/sewage treatment, water/sludge/sewage treatment, physical/chemical process catalyst, etc., can solve the problem of reducing the efficiency of photocatalytic oxidation

Inactive Publication Date: 2018-05-04
NANJING TECH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, a non-metallic graphene-like carbon nitride semiconductor photocatalyst has appeared. Due to the strong recombination ability of photogenerated electrons and positive charges of this catalyst, the photocatalytic oxidation efficiency is greatly reduced. If TiO 2 Loaded on carbon nitride to form a heterogeneous junction, thereby effectively improving the separation ability of photogenerated electrons and positive charges

Method used

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  • A photodegradation catalyst for organic sewage treatment and preparation method thereof
  • A photodegradation catalyst for organic sewage treatment and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 100g of melamine was calcined at 520°C for 3 hours, taken out and ground into powder to obtain carbon nitride powder.

[0020] Mix 8ml of n-butyl titanate, 1ml of HF solution (40wt%), 0.2g of carbon nitride powder, and 150ml of isopropanol into a hydrothermal reactor, and react at 180°C for 24h, and the obtained After the suspension was separated, it was washed with water several times, and dried at 90°C to obtain a light yellow powder.

[0021] Disperse more than 0.2 g of catalyst powder by ball milling in 10 mL of water to prepare a dispersion slurry, then add the slurry to 1 L of organically polluted water with a solubility of 10 mg / mL (the pollutant is methyl blue), and place it under control Strength is 0.51W / m 2 @340nm Q-SUN aging box for 2h, the residual amount of organic pollutants is 3.5% of the initial solubility.

Embodiment 2

[0023] 100g of melamine was calcined at 520°C for 3h, taken out and ground into powder to obtain carbon nitride powder, and then calcined at 550°C for 0.5h.

[0024] Mix 8ml of n-butyl titanate, 1ml of HF solution (40wt%), 0.1g of carbon nitride powder, and 150ml of isopropanol into a hydrothermal reactor, and react at 180°C for 24h, and the resulting After the suspension was separated, it was washed with water several times, and dried at 90°C to obtain a light yellow powder.

[0025] Disperse more than 0.2 g of catalyst powder by ball milling in 10 mL of water to prepare a dispersion slurry, then add the slurry to 1 L of organically polluted water with a solubility of 10 mg / mL (pollutant is methyl blue), and place under control Strength is 0.51W / m 2 @340nm Q-SUN aging box for 2h, the residual organic pollutants are 3.0% of the initial solubility.

Embodiment 3

[0027] 100g of melamine was calcined at 520°C for 3 hours, taken out and ground into powder to obtain carbon nitride powder.

[0028] Mix 8ml of tetraisopropyl titanate, 1ml of HF solution (40wt%), 0.1g of carbon nitride powder, and 150ml of isobutanol into a hydrothermal reactor, and react for 24 hours at 180°C. The obtained suspension was separated, washed with water several times, and dried at 90° C. to obtain a light yellow powder.

[0029] More than 0.3g of catalyst powder ball milling is dispersed in the water of 10ml and is prepared into dispersion slurry, then this slurry is added in the water body of 20mg / mL organic pollution (pollutant is phenol) by the solubility of 1L, is placed in the care intensity of 0.51W / m 2 @340nm Q-SUN aging box for 2h, the residual amount of organic pollutants is 3.6% of the initial solubility.

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Abstract

The invention discloses a photodegradable catalyst for organic sewage treatment and a preparation method of the photodegradable catalyst. The photodegradable catalystis is formed by loading nano-flake-shaped titanium dioxide on carbon nitride nano-flakes, and has the advantages of being efficient, capable of being reused for many times and free of secondary pollution. The photodegradable catalyst for organic sewage treatment is a titanium dioxide / carbon nitride compound photodegradable catalyst; the titanium dioxide is nano-flake-shaped; the nano-flake-shaped titanium dioxide is loaded on the carbon nitride nano-flakes; the particle diameter of the compound photodegradable catalyst is 1-10 [mu]m; the mass ratio of the nano-flake-shaped titanium dioxide to the carbon nitride nano-flakes is (15:1)-(5:1).

Description

technical field [0001] The invention relates to a catalyst and a preparation method thereof, in particular to a photodegradation catalyst for organic sewage treatment and a preparation method thereof. Background technique [0002] At present, more than 2,000 kinds of organic substances have been detected in surface waters around the world, among which hundreds of them are carcinogenic and teratogenic. With the development of industrial and agricultural production, more and more organic pollutants are discharged through the three wastes. Rainfall has caused varying degrees of pollution to the water environment, causing a series of social problems. At present, the treatment technology of organic wastewater mainly includes: biological treatment technology, chemical treatment technology and physical treatment technology such as adsorption filtration. In recent years, a new technology for treating organic pollutants in water bodies by photocatalytic oxidation has been developed....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J35/02C02F1/30
CPCB01J27/24B01J35/004B01J35/02B01J35/023C02F1/30C02F2101/30C02F2305/10
Inventor 江国栋杨霄霄沈晓冬崔升林本兰
Owner NANJING TECH UNIV
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