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Photocatalyst with broadband spectrum response and preparation method thereof

A photocatalyst and broad spectrum technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of insufficient light response range, low quantum efficiency of composite materials, etc., to improve catalytic performance , the effect of broadening the spectral response range and increasing the lifespan

Inactive Publication Date: 2017-11-07
江苏科来材料科技有限公司
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AI Technical Summary

Problems solved by technology

However, the quantum efficiency of the composite material of this method is still not high, and the photoresponse range is still not wide enough.

Method used

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  • Photocatalyst with broadband spectrum response and preparation method thereof
  • Photocatalyst with broadband spectrum response and preparation method thereof

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preparation example Construction

[0064] A preparation method of a photocatalyst with wide spectral response, the photocatalyst of described wide spectral response is nitrogen iron doped bismuth tungstate composite titanium dioxide nanomaterial, the preparation method of the photocatalyst of described wide spectral response is as follows:

[0065] 1. Prepare titanium dioxide nanomaterials; the titanium dioxide nanomaterials are titanium dioxide nanoparticles or titanium dioxide nanotubes;

[0066] 2. Doping titanium dioxide nanomaterials with iron and nitrogen;

[0067] 3. Preparation of nitrogen-iron-doped bismuth tungstate composite titanium dioxide nanomaterials.

[0068] Wherein, in the step 1), nano-titanium dioxide nanoparticles can be prepared by evaporation condensation method, sol-gel method, or hydrothermal method, or titanium dioxide nanotubes can be prepared by hydrothermal method, template method, anodic oxidation method, or crystal powder digestion method. However, the preparation of titania nan...

Embodiment 1

[0101] A photocatalyst with broad spectral response prepared by the following method:

[0102] 1. Preparation of titanium dioxide nanotubes

[0103] 1.1, the TiO 2 Dissolve the powder particles in 10mol / L NaOH solution, stir until fully mixed; TiO 2 The mass fraction in NaOH solution is 7%wt;

[0104] 1.2. Put the above solution into a high-pressure reaction kettle lined with polytetrafluoroethylene, keep the temperature at 160°C for 48 hours, and then cool it down to room temperature naturally;

[0105] 1.3. Put the cooled sample into a centrifuge for centrifugation, and then add deionized water until the pH value is near neutral;

[0106] 1.4. Wash the sample with a hydrochloric acid solution with a concentration of 0.1mol / L, and then wash the sample with deionized water until the pH value is near neutral;

[0107] 1.5. Use a centrifuge to separate and dry at 80°C to obtain titanium dioxide nanotubes;

[0108] 2. Doping titanium dioxide nanotubes with iron and nitrogen ...

Embodiment 2

[0118] 1. Preparation of titanium dioxide nanotubes

[0119] 1.1, the TiO 2 Dissolve the powder particles in 15mol / L NaOH solution, stir until fully mixed; TiO 2 The mass fraction in NaOH solution is 5%wt;

[0120] 1.2. Put the above solution into a high-pressure reaction kettle lined with polytetrafluoroethylene, keep the temperature at 180°C for 48 hours, and then cool it down to room temperature naturally;

[0121] 1.3. Put the cooled sample into a centrifuge for centrifugation, and then add deionized water until the pH value is near neutral;

[0122] 1.4. Wash the sample with a hydrochloric acid solution with a concentration of 0.1mol / L, and then wash the sample with deionized water until the pH value is near neutral;

[0123] 1.5. Use a centrifuge to separate and dry at 100°C to obtain titanium dioxide nanotubes;

[0124] 2. Doping titanium dioxide nanotubes with iron and nitrogen

[0125] 2.1. Put the titanium dioxide nanotubes prepared in step 1 into ferric nitrate...

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Abstract

The invention provides a preparation method for a photocatalyst with broadband spectrum response. The photocatalyst with broadband spectrum response is a nitrogen iron-doped bismuth tungstate compound titanium dioxide nano-particle or nano-tube. The preparation method for the photocatalyst with broadband spectrum response comprises the following steps: preparing a titanium dioxide nanometer material; doping nitrogen and iron into the titanium dioxide nanometer material; and preparing the nitrogen iron-doped bismuth tungstate compound titanium dioxide nanometer material. The invention combines ion doping modifying and semiconductor compound modifying techniques for expanding the ultraviolet part of the photocatalyst with broadband spectrum response scope below 387nm to a near-infrared band, the visible light and near-infrared light response of the nanometer titanium dioxide photocatalyst is realized and the catalytic activity of the nanometer carbon dioxide photocatalyst is enhanced.

Description

technical field [0001] The invention relates to the field of photocatalyst manufacture, in particular to a photocatalyst with wide spectral response and a preparation method thereof. Background technique [0002] With the acceleration of industrialization, environmental and energy problems are becoming more and more serious. Air pollution, water pollution, interior decoration pollution, vehicle pollution, etc. all threaten human health. In recent years, photocatalytic technology has developed rapidly and is widely used in air and water purification, sterilization and other fields. The reaction condition is mild, the cost is low, solar energy can be used as the driving force, and there is no secondary pollution. It is a method that can not only alleviate energy shortage but also effectively prevent and control environmental pollution. [0003] As the most common photocatalyst, nano-titanium dioxide has the advantages of stable properties, economical, green and non-hazardous...

Claims

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Application Information

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IPC IPC(8): B01J27/24
CPCB01J27/24B01J35/39
Inventor 时宝蓝家平
Owner 江苏科来材料科技有限公司
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