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Preparation method for Ti3+/TiO2 photo-catalyst with hollow structure

A photocatalyst and hollow structure technology, applied in the field of environmental management, can solve problems such as reducing photocatalytic performance, achieve good recyclability, improve absorption and response, and reduce time.

Inactive Publication Date: 2017-11-24
AOWEI TIANJIN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, usually ion doping will form defects inside the titanium dioxide lattice, which will become the recombination center of photogenerated carriers and reduce its photocatalytic performance.

Method used

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  • Preparation method for Ti3+/TiO2 photo-catalyst with hollow structure
  • Preparation method for Ti3+/TiO2 photo-catalyst with hollow structure
  • Preparation method for Ti3+/TiO2 photo-catalyst with hollow structure

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Experimental program
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Effect test

Embodiment 1

[0025] Mix 3.54 mL of glacial acetic acid, 0.35 mL of deionized water, and 4.372 mL of ionic liquid [Bmim][BF 4 ] mixed together. On this basis, 2 mL of tetrabutyl titanate was added dropwise to the previous mixed solution at a rate of 0.1 mL / s, and stirred during the whole process until the precursor solution became clear and transparent. The homogeneous solution was transferred to a 70 mL polytetrafluoroethylene reaction tank, and was heated in a microwave reactor (MDS-6, Shanghai Xinyi) at 150 o C was taken out after reacting for 1 hour, and the collected powder was cleaned three times with deionized water and absolute ethanol respectively, and placed in an oven for 60 o C drying, and finally placed in a vacuum oven at 200 o C heat treatment for 6 hours.

[0026] According to the XRD test of the synthesized catalyst, all the samples of microwave-assisted solvothermal synthesis have good crystallinity. The way of conduction to reactant molecules, the particularity of mic...

Embodiment 2

[0028] Mix 3.54 mL of glacial acetic acid, 0.35 mL of deionized water, and 4.372 mL of ionic liquid [Bmim][BF 4 ] mixed together. On this basis, 2 mL of tetrabutyl titanate was added dropwise to the previous mixed solution at a rate of 0.1 mL / s, and stirred during the whole process until the precursor solution became clear and transparent. The homogeneous solution was transferred to a 70 mL polytetrafluoroethylene reaction tank, and was heated in a microwave reactor (MDS-6, Shanghai Xinyi) at 150 o C was taken out after reacting for 1 hour, and the collected powder was cleaned three times with deionized water and absolute ethanol respectively, and placed in an oven for 60 o C drying, synthesis of TiO with a hollow structure 2 . The sample had a degradation rate of 72% for methylene blue under visible light with a wavelength greater than 400 nm within 120 minutes.

Embodiment 3

[0030] Mix 3.54 mL of glacial acetic acid, 0.35 mL of deionized water, and 4.372 mL of ionic liquid [Bmim]Cl. On this basis, 2 mL of tetrabutyl titanate was added dropwise to the previous mixed solution at a rate of 0.1 mL / s, and stirred during the whole process until the precursor solution became clear and transparent. The homogeneous solution was transferred to a 70 mL polytetrafluoroethylene reaction tank, and was heated in a microwave reactor (MDS-6, Shanghai Xinyi) at 150 o C was taken out after reacting for 1 hour, and the collected powder was cleaned three times with deionized water and absolute ethanol respectively, and placed in an oven for 60 o C drying, and finally placed in a vacuum oven at 200 o C heat treatment for 6 hours. The sample had a degradation rate of 44% for methylene blue under visible light with a wavelength greater than 400 nm within 120 minutes.

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Abstract

The invention discloses a preparation method for a Ti<3+> / TiO2 photo-catalyst with a hollow structure, belonging to the technical field of photocatalysis. The method comprises the following steps: by combining fluorine source control and a vacuum calcination method, and taking the ionic liquid of 1-butyl-3-methylimidazolium tetrafluoroborate as a solvent and a microwave absorbing agent, compounding titanium dioxide with the hollow structure under a microwave-assisted heating condition, and then further modifying by adopting the vacuum calcination method, thereby compounding Ti<3+> / TiO2 with the hollow structure. The catalyst is applied to the field of removing water pollutant under the effect of visible light. The photo-catalyst disclosed by the invention can promote the visible light absorption, and meanwhile, a special shell structure is formed according to the vacuum calcination method, so that the catalyst has excellent recyclability in the photo-catalytic reaction. The preparation method is simple and feasible and is beneficial to large-scale popularization.

Description

technical field [0001] The invention relates to photocatalytic technology in the field of environmental governance, in particular to a Ti 3+ / TiO 2 Preparation method of photocatalyst. Background technique [0002] Among many photocatalytic materials, titanium dioxide is non-toxic, has good chemical stability, high photocatalytic activity, and is cheap and easy to obtain, so it has become the most widely used semiconductor photocatalytic material. However, TiO 2 In the practical application of photocatalytic materials, there are problems such as narrow photoresponse range and low quantum efficiency, which restrict the practical application and promotion of materials. The method of ion doping can effectively solve the problem of TiO 2 The problem of wide band gap can be excited by visible light, and the utilization rate of visible light can be improved. However, usually ion doping will form defects inside the titanium dioxide lattice, which will become the recombination ...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J37/08B01J37/34
CPCB01J21/063B01J37/08B01J37/346B01J35/39
Inventor 陈昱张伦梁王红黄磊汤瑶黄笑帝
Owner AOWEI TIANJIN ENVIRONMENTAL PROTECTION TECH
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