Method for preparing nano black TiO2 by aerosol method

An aerosol and black technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as insufficient solar energy utilization efficiency, complicated preparation methods, and inability to meet performance requirements, etc., to achieve excellent Photocatalytic performance, wide source of raw materials, and convenient operation

Inactive Publication Date: 2020-12-29
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

TiO 2 The bandgap energy width is 3.0-3.2eV, and it can only absorb energy in the ultraviolet region, so the utilization efficiency of solar energy is less than 5%.
Among these specific preparation methods, hydrogenation treatment requires a high-pressure environment and a hydrogen atmosphere, and the safety is low; the chemical reduction method needs to introduce a certain amount of reducing agent, so that the product purity is not high; other material preparation methods are complex and consume high energy consumption. , the product particles are too large to meet the relevant performance requirements

Method used

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  • Method for preparing nano black TiO2 by aerosol method
  • Method for preparing nano black TiO2 by aerosol method
  • Method for preparing nano black TiO2 by aerosol method

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Effect test

Embodiment 1

[0034] Preparation of nano-black TiO by an aerosol method 2 method, including the following steps:

[0035] Weigh 10g of n-butyl titanate and 100g of absolute ethanol respectively, pour them into a beaker, and mix them uniformly by ultrasonic to obtain a homogeneous precursor solution; 2 As the carrier gas, and the pressure of the carrier gas is controlled to 0.1Mpa, the precursor solution is atomized into 2μm aerosol droplets through the atomizer, and then sent to a tube furnace at 600°C for 3-4s; the obtained sample powder is collected , that is, black TiO 2 nanoparticles.

[0036] The product obtained in this embodiment is analyzed by X-ray diffraction, the results are shown in figure 1 ,Depend on figure 1 It can be seen that the obtained product is anatase TiO 2 .

[0037] The transmission electron microscope figure of the product obtained in this embodiment is shown in figure 2 , it can be seen that the obtained product is spherical, with a particle size of 100 nm...

Embodiment 2

[0040] Preparation of nano-black TiO by an aerosol method 2 method, including the following steps:

[0041] Weigh 5g of titanium tetrachloride and 100g of absolute ethanol respectively and pour them into a beaker, and mix them uniformly by ultrasonic to obtain a homogeneous precursor solution; 2 As the carrier gas, and the carrier gas pressure is controlled to 0.3Mpa, the precursor solution is atomized into aerosol droplets through the atomizer, and then sent to a tube furnace at 700°C, and the reaction time is 0.9-1s to collect the obtained sample powder , that is, black TiO 2 nanoparticles.

[0042] The XRD pattern and TEM of the product obtained in this embodiment are shown in Figure 4 and Figure 5 . The results show that the obtained product is spherical TiO 2 particles.

Embodiment 3

[0044] Preparation of nano-black TiO by an aerosol method 2 method, including the following steps:

[0045] Weigh 10g of n-butyl titanate and 100g of n-hexane and pour them into a beaker, and mix them uniformly by ultrasonic to obtain a homogeneous precursor solution; 2 as the carrier gas, and the pressure of the carrier gas is controlled to 0.2Mpa. The precursor solution is atomized into aerosol droplets through the atomizer, and then sent to a tube furnace at 800°C for 1-2 seconds; the sample powder is collected to obtain Black TiO 2nanoparticles.

[0046] The XRD pattern and TEM of the product obtained in this embodiment are shown in Figure 6 and Figure 7 . The results showed that the obtained product was spherical TiO 2 particles.

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Abstract

The invention discloses a method for preparing nano black TiO2 by using an aerosol method, which comprises the following steps: 1) dissolving a titanium source in an organic solvent, and uniformly mixing to form a homogeneous solution or colloidal solution, thereby obtaining a precursor solution; 2) atomizing the obtained precursor solution by adopting an atomizer to form aerosol droplets; and 3)introducing the formed aerosol liquid drops into a tubular furnace for calcining to obtain the black TiO2 nano powder. According to the preparation method, the black TiO2 is prepared by adopting an aerosol method for the first time, a titanium source and an organic solvent are used for preparing a precursor solution, the precursor solution is atomized to form small liquid drops, other reduction conditions do not need to be additionally introduced, and the black TiO2 nanoparticles are obtained by directly calcining. The related preparation method is simple, convenient to operate, good in repeatability and suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic functional materials, in particular to an aerosol method for preparing nano-black TiO 2 Methods. Background technique [0002] Since 1972, Japanese scientists discovered TiO 2 After the electrode has photolytic water splitting properties, TiO 2 Materials have become a hot spot for researchers of photocatalyst materials. Compared with other kinds of materials, TiO2 is more suitable for the removal of organic pollutants, hydrogen production by photolysis of water and various photocatalytic reactions. 2 It has unique advantages such as rich energy storage, strong oxidation, and light corrosion resistance. TiO 2 The bandgap energy width of solar energy is 3.0-3.2eV, and it can only absorb energy in the ultraviolet region, so the utilization efficiency of solar energy is less than 5%. In order to enhance the TiO 2 The performance of the researchers on ordinary TiO 2 Doping mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/07B82Y30/00B82Y40/00
CPCC01G23/07B82Y30/00B82Y40/00C01P2002/72C01P2002/84C01P2004/04C01P2004/61C01P2004/62C01P2004/64C01P2006/60
Inventor 姜兴茂季凯张睿许梓欣许钰清姜建霖
Owner WUHAN INSTITUTE OF TECHNOLOGY
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