Method for preparing Al/In-codoped TiO2 photocatalyst

A photocatalyst and co-doping technology, which is applied in the field of environmental purification functional materials, In co-doped TiO2 photocatalysts, and the preparation of Al, can solve the problems of photocatalysts that have not been reported, to expand the range of light absorption and improve photocatalytic efficiency , increasing the effect of lattice defects

Inactive Publication Date: 2013-08-14
SHENYANG LIGONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, for In and Al co-doped TiO 2 Photocatalysts have not yet been reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of preparation of Al, In co-doped TiO 2 The method for photocatalyst, comprising the following process steps:

[0021] (1) Precursor preparation

[0022] Put 0.0675 g of In (NO 3 ) 3 ·4.5H 2 O and 0.047 g of anhydrous aluminum chloride were added to 8 mL of anhydrous ethanol to dissolve completely, then 2 mL of tetra-n-butyl titanate and 0.1 mL of concentrated hydrochloric acid were added, and stirred for 30 min to form a precursor solution, in which Al:In : The atomic molar ratio of Ti is 0.5:3:1, wherein the purity of indium nitrate, aluminum chloride and absolute ethanol is analytically pure, and the purity of tetra-n-butyl titanate is chemically pure;

[0023] (2) Gel reaction

[0024] Slowly drop the prepared mixture of 4 mL of absolute ethanol and 0.9 mL of water into the precursor solution obtained in step (1), and continue to stir until a gel is formed;

[0025] (3) Aging and calcination

[0026] The gel obtained in step (2) was aged at room temper...

Embodiment 2

[0028] A kind of preparation of Al, In co-doped TiO 2 The method for photocatalyst, comprising the following process steps:

[0029] (1) Precursor preparation

[0030] Put 0.0675 g of In (NO 3 ) 3 ·4.5H 2 O and 0.085 g of AlCl 3 ·6H 2 O was added to 10 mL of absolute ethanol to dissolve completely, then 2 mL of tetra-n-butyl titanate and 0.1 mL of concentrated hydrochloric acid were added, and stirred for 30 min to prepare a precursor solution, where the atomic molar ratio of Al:In:Ti was 0.5: 3:1, wherein the purity of indium nitrate, aluminum chloride and absolute ethanol are analytically pure, and the purity of tetra-n-butyl titanate is chemically pure;

[0031] (2) Gel reaction

[0032] Slowly drop the prepared mixture of 5 mL of absolute ethanol and 1 mL of water into the precursor solution obtained in step (1), and continue to stir until a gel is formed;

[0033] (3) Aging and calcination

[0034] The gel obtained in step (2) was aged at room temperature for 24 ...

Embodiment 3

[0036] A kind of preparation of Al, In co-doped TiO 2 The method for photocatalyst, comprising the following process steps:

[0037] (1) Precursor preparation

[0038] Put 0.0675 g of In (NO 3 ) 3 ·4.5H 2 O and 0.085 g of AlCl 3 ·6H 2 O was added to 10 mL of absolute ethanol to dissolve completely, then 2 mL of tetra-n-butyl titanate and 0.1 mL of concentrated hydrochloric acid were added, and stirred for 60 min to prepare a precursor solution, wherein the atomic molar ratio of Al:In:Ti was 0.5: 3:1, wherein the purity of indium nitrate, aluminum chloride and absolute ethanol are analytically pure, and the purity of tetra-n-butyl titanate is chemically pure;

[0039] (2) Gel reaction

[0040] Slowly drop the prepared mixture of 4 mL of absolute ethanol and 0.9 mL of water into the precursor solution obtained in step (1), and continue to stir until a gel is formed;

[0041] (3) Aging and calcination

[0042] The gel obtained in step (2) was aged at room temperature for...

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Abstract

The invention relates to a method for preparing an Al / In-codoped TiO2 photocatalyst, which comprises the following steps: dissolving 0.0675g of indium nitrate and 0.047g of aluminum chloride in 8mL of anhydrous ethanol, adding 2mL of tetra-n-butyl titanate and 0.1mL of concentrated hydrochloric acid, and stirring to obtain a precursor solution; dropwisely adding a mixed solution composed of 4mL of anhydrous ethanol and 0.3mL of water into the precursor solution, and stirring to form a gel; and aging the gel for 24 hours, drying in a drying oven, grinding into powder, adding the powder in an electric furnace, heating to 400-500 at the rate of 5 DEG C / minute, calcining for 3 hours, cooling to room temperature, grinding, and recording the photocatalyst sample as 0.5%Al-3%In-TiO2. The doping of the metallic ions inhibits the transition of TiO2 crystal form, increases the TiO2 surface lattice defects, widens the light absorption range of TiO2, and enhances the photocatalytic efficiency of TiO2.

Description

technical field [0001] The invention belongs to the field of chemical materials, relates to an environmental purification functional material, and in particular relates to a method for preparing Al and In co-doped TiO 2 method of photocatalyst. Background technique [0002] Nano TiO 2 Under ultraviolet light, it has a high photocatalytic degradation rate of environmental pollutants, and also has the advantages of non-toxicity and no secondary pollution, which has attracted the attention of researchers in recent years. However, its high electron-hole pair recombination rate and low light utilization rate limit its application in environmental pollution treatment. Therefore, it is necessary to 2 Modification is carried out to improve its photocatalytic activity against pollutants, for example, metal doping, non-metal doping, semiconductor compounding, etc. are all commonly used means. [0003] In recent years, two ions co-doped TiO 2 received extensive attention, with sin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/08C02F1/32
Inventor 张文杰
Owner SHENYANG LIGONG UNIV
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