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Method for preparing flaky TiO2/g-C3N4 heterojunction by one-step method

A g-c3n4, heterojunction technology, applied in chemical instruments and methods, catalyst activation/preparation, water/sludge/sewage treatment, etc., can solve problems such as easy recombination of photogenerated electrons and holes, and low utilization rate of solar energy , to achieve the effect of simple and quick method, low cost and large specific surface area

Inactive Publication Date: 2019-08-16
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

TiO 2 Photocatalytic oxidation technology has the advantages of strong oxidative degradation ability, stable performance, low treatment cost and no secondary pollution, but it has a wide band gap (3.2eV) and low utilization rate of solar energy.
g-C 3 N 4 The band gap is narrow (2.7eV), and the spectral response range is wide, but its photogenerated electron-hole recombination is easy

Method used

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  • Method for preparing flaky TiO2/g-C3N4 heterojunction by one-step method
  • Method for preparing flaky TiO2/g-C3N4 heterojunction by one-step method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Add acetylacetone and tetrabutyl titanate in sequence to absolute ethanol at a volume ratio of 1:1:3, mix well

[0025] Get solution A;

[0026] 2) Add polyvinylpyrrolidone with a mass ratio of 8% to solution A, and completely dissolve to obtain solution B;

[0027] 3) Add melamine powder with a mass ratio of 12.5% ​​to solution B, and stir to obtain mixed solution C;

[0028] 4) Put the mixed solution C into a 5mL syringe, install the syringe on the electrospinning device, conduct electrospinning at a voltage of 20KV, a solution supply rate of 50μL / min, and a receiving distance of 20cm, and collect the product with a stainless steel plate;

[0029] 5) After the product is dried, it is calcined at 550° C. for 4 hours in an air atmosphere;

Embodiment 2

[0031] 1) Add acetylacetone and tetrabutyl titanate in sequence to absolute ethanol at a volume ratio of 1:1:2, mix well

[0032] Get solution A;

[0033] 2) Add polyvinylpyrrolidone with a mass ratio of 10% to solution A, and completely dissolve to obtain solution B;

[0034] 3) Add melamine powder with a mass ratio of 15% to solution B, and stir to obtain mixed solution C;

[0035] 4) Put the mixed solution C into a 5mL syringe, install the syringe on the electrospinning device, conduct electrospinning at a voltage of 20KV, a solution supply rate of 50μL / min, and a receiving distance of 20cm, and collect the product with a stainless steel plate;

[0036] 5) After the product is dried, it is calcined at 550° C. for 4 hours in an air atmosphere;

Embodiment 3

[0038] 1) Add acetylacetone and tetrabutyl titanate in sequence to absolute ethanol at a volume ratio of 1:1:3, mix well

[0039] Get solution A;

[0040] 2) Add polyvinylpyrrolidone with a mass ratio of 12% to solution A, and completely dissolve to obtain solution B;

[0041] 3) Add melamine powder with a mass ratio of 17.5% to solution B, and stir to obtain mixed solution C;

[0042] 4) Put the mixed solution C into a 5mL syringe, install the syringe on the electrospinning device, conduct electrospinning at a voltage of 20KV, a solution supply rate of 50μL / min, and a receiving distance of 20cm, and collect the product with a stainless steel plate;

[0043] 5) After the product is dried, it is calcined at 550° C. for 4 hours in an air atmosphere;

[0044] Build TiO 2 / g -C 3 N 4 heterojunction, capable of reducing TiO 2 The bandgap width can increase the light absorption range, while reducing the photogenerated electron-hole recombination efficiency and improving the ph...

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Abstract

The invention relates to a method for preparing a flaky TiO2 / g-C3N4 heterojunction by a one-step method, the method comprises the following steps: (1) sequentially adding acetylacetone and tetrabutyltitanate into absolute ethyl alcohol to obtain a solution A; (2) adding polyvinyl pyrrolidone into the solution A to obtain a solution B after complete dissolution; (3) adding a proper amount of melamine powder into the solution B to obtain a solution C after complete dissolution; (4) filling the mixed solution C into a syringe, performing electrostatic spinning under certain conditions, and collecting a spinning product by using a stainless steel disc; and (5) after the spinning product is dried, roasting the spinning product for 4 hours at 550 DEG C in an air atmosphere. The method has the characteristics of simple and quick method, low cost, small product fiber diameter and large specific surface area, and is widely applied to photocatalytic hydrogen production and pollutant degradation.

Description

technical field [0001] The invention relates to the technical field of material forming methods, in particular to a one-step method for preparing flake TiO 2 / g -C 3 N 4 heterojunction approach. Background technique [0002] The industrial production process produces a large amount of industrial wastewater, which not only pollutes the environment, but also poses a great hazard to human health, and must be treated before being discharged. Traditional industrial wastewater treatment methods mainly include physical methods, chemical methods and biological methods, which have the disadvantages of limited treatment capacity and high treatment costs. [0003] In recent years, photocatalytic oxidation technology has been widely used in the treatment of industrial wastewater. TiO 2 Photocatalytic oxidation technology has the advantages of strong oxidative degradation ability, stable performance, low treatment cost and no secondary pollution, but it has a wide band gap (3.2eV) a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/10B01J37/08C02F1/30
CPCB01J27/24B01J37/0018C02F1/30C02F2305/10B01J35/61B01J35/39
Inventor 杨艳玲邹鑫鑫孙瑜锁国权张荔毕雅欣冯雷陈华军侯小江陈志刚和茹梅叶晓慧朱建锋
Owner SHAANXI UNIV OF SCI & TECH
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