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Preparation method and application of activated carbon doped titanium dioxide nano photocatalyst

A nano-photocatalyst, titanium dioxide technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as wide band gap, low utilization rate of sunlight, large surface area of ​​activated carbon, etc., to achieve Easy synthesis, high visible light activity, and high photocatalytic efficiency

Inactive Publication Date: 2017-03-22
HOHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Purpose of the invention: the present invention is aimed at pure TiO 2 To solve the problems of wide band gap and low utilization rate of sunlight, a preparation method and application of activated carbon-doped titanium dioxide nano-photocatalyst are provided, which utilizes the large surface area of ​​activated carbon and the characteristics of significant absorption of visible light for TiO 2 Modified, the prepared catalyst has higher photocatalytic activity

Method used

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  • Preparation method and application of activated carbon doped titanium dioxide nano photocatalyst
  • Preparation method and application of activated carbon doped titanium dioxide nano photocatalyst
  • Preparation method and application of activated carbon doped titanium dioxide nano photocatalyst

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Embodiment 1

[0026] The preparation method of activated carbon doped titanium dioxide nanometer photocatalyst comprises the steps:

[0027] (1) Mix 60ml of absolute ethanol, 20ml of glacial acetic acid and 20ml of butyl titanate evenly, then add ethanol aqueous solution (the volume ratio of ethanol to water is 1:1) dropwise to the mixture, keep stirring for 0.5 hours, and set aside ;

[0028] (2) After drying 10 mg of activated carbon in an oven at 60°C for 24 hours, dissolve it in 50 ml of ultrapure water and disperse it ultrasonically. Take the upper liquid and drop it into the solution prepared in step (1), and stir for 0.5 hours ,spare;

[0029] (3) Transfer the solution prepared in step (2) into a microwave reactor, react for 15 minutes under a microwave power of 120w, centrifuge the final product, wash it three times with ultrapure water and absolute ethanol, Dry in an oven at 60°C for 12 hours and grind to obtain a 1% activated carbon-doped titanium dioxide nanophotocatalyst (1% A...

Embodiment 2

[0034] The preparation method of activated carbon doped titanium dioxide nanometer photocatalyst comprises the steps:

[0035] (1) Mix 60ml of absolute ethanol, 20ml of glacial acetic acid and 20ml of butyl titanate evenly, then add ethanol aqueous solution (the volume ratio of ethanol to water is 1:1) dropwise to the mixture, keep stirring for 0.5 hours, and set aside ;

[0036] (2) After drying 20 mg of activated carbon in an oven at 60°C for 24 hours, dissolve it in ultrapure water and disperse it ultrasonically. Take the upper liquid and drop it into the solution prepared in step (1), stir for 0.5 hours, and set aside ;

[0037] (3) Transfer the solution prepared in step (2) into a microwave reactor, react for 15 minutes under a microwave power of 120w, centrifuge the final product, wash it three times with ultrapure water and absolute ethanol, Dry in an oven at 60°C for 12 hours and grind to obtain a 1% activated carbon-doped titanium dioxide nanophotocatalyst (2% AC@Ti...

Embodiment 3

[0039] The preparation method of activated carbon doped titanium dioxide nanometer photocatalyst comprises the steps:

[0040] (1) Mix 60ml of absolute ethanol, 20ml of glacial acetic acid and 20ml of butyl titanate evenly, then add ethanol aqueous solution (the volume ratio of ethanol to water is 1:1) dropwise to the mixture, keep stirring for 0.5 hours, and set aside ;

[0041] (2) After drying 4 mg of activated carbon in an oven at 60°C for 24 hours, dissolve it in ultrapure water and disperse it ultrasonically. Take the upper liquid and drop it into the solution prepared in step (1), stir for 0.5 hours, and set aside ;

[0042] (3) Transfer the solution prepared in step (2) into a microwave reactor, react for 15 minutes under a microwave power of 120w, centrifuge the final product, wash it three times with ultrapure water and absolute ethanol, Dry in an oven at 60°C for 12 hours and grind to obtain a 1% activated carbon-doped titanium dioxide nanophotocatalyst (0.4 % AC@...

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Abstract

The invention relates to a preparation method and an application of an activated carbon doped titanium dioxide nano photocatalyst. The preparation method comprises the following steps of: (1) uniformly mixing absolute ethyl alcohol, glacial acetic acid and butyl titanate in a volume ratio, adding an ethyl alcohol aqueous solution into the mixed solution drop by drop, and conducting stirring for later use; (2) dissolving dried activated carbon into ultrapure water, performing centrifugal separating, taking out an upper-layer liquid and dropwise adding the upper-layer liquid into the solution prepared in the step (1) drop by drop, and performing stirring for later use; and (3) transferring the solution prepared in the step (2) into a microwave reactor to be subjected to a microwave reaction, performing centrifugal separating after the microwave reaction is ended, cleaning the obtained solid, and performing drying and grinding to obtain the activated carbon doped titanium dioxide nano photocatalyst. The activated carbon doped titanium dioxide nano photocatalyst prepared by the preparation method has the characteristic of remarkably absorbing visible light, has relatively high photocatalytic activity, and can be applied to degrading organic pollutants in water.

Description

technical field [0001] The invention belongs to the field of photocatalytic materials and photodegradation of organic pollutants, in particular to a preparation method and application of activated carbon-doped titanium dioxide nano photocatalysts. Background technique [0002] TiO 2 With good biological, chemical and photochemical stability, it has been widely used in wastewater treatment, harmful gas purification, cosmetics manufacturing, building materials, textile products, coatings, solar energy storage and conversion, laser chemical conversion and other fields. But TiO 2 It is a broadband conductor with a wide band gap (3.0~3.2eV), and it is only active in the near ultraviolet region. Pure TiO 2 The utilization rate of sunlight is 4%, so in recent years, in order to improve TiO 2 The photoelectron effect and the utilization rate of sunlight, the use of metal doping, photosensitization of dyes, deposition of noble metals and other methods on TiO 2 However, since d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18B01J37/34C02F1/30C02F1/72
CPCC02F1/30C02F1/725B01J21/18B01J37/346C02F2305/10B01J35/39Y02W10/37
Inventor 许航吴章高晓宏林晨烁丁明梅
Owner HOHAI UNIV
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