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Alumina-supported modified nanometer titanium dioxide particle composite material, preparation method and applications thereof

A technology supported by nano-titanium dioxide and alumina, which is applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc. Easy to agglomerate and deactivate problems, to improve the effect of narrow light response range

Inactive Publication Date: 2018-03-16
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Titanium dioxide is an indirect bandgap semiconductor, which can only absorb ultraviolet rays with a wavelength less than 387nm, so it cannot make full use of solar energy, that is, the photoresponse range is narrow; the photogenerated electrons and holes of pure titanium dioxide are easily recombined, resulting in low photon quantum efficiency; most titanium dioxide Mainly powder, there are problems of easy agglomeration and deactivation and difficult separation and recovery in practical applications, that is, there is a problem of immobilization of pure titanium dioxide

Method used

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  • Alumina-supported modified nanometer titanium dioxide particle composite material, preparation method and applications thereof
  • Alumina-supported modified nanometer titanium dioxide particle composite material, preparation method and applications thereof
  • Alumina-supported modified nanometer titanium dioxide particle composite material, preparation method and applications thereof

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Embodiment 1

[0033] Embodiment 1 prepares the composite material of alumina-loaded modified nano-titanium dioxide particles, comprising the following steps:

[0034] 1) Mix 20mL aluminum chloride and 25mL sodium carbonate, hydrolyze to obtain alumina hydrate, conduct hydrothermal treatment at 180°C for 2h, dry at 120°C, add 15mL hydrochloric acid, 2mL silica sol and 0.36g fish oil to obtain alumina sol;

[0035] 2) Drop the alumina sol into paraffin, form spherical sol particles by the action of surface tension, then gel the sol particles in ammonia water, and finally dry and calcinate the gel particles to form spherical alumina with a diameter of 3~ 5mm.

[0036] 3) Add 5 mL of tetrabutyl titanate dropwise to 25 mL of isopropanol, stir vigorously at room temperature for 30 minutes, and adjust the pH with concentrated nitric acid until pH = 3 to obtain solution A; mix 3.5 mL of secondary water and 5 mL Mix isopropanol and stir for 10 minutes to obtain solution B; add 1.23 mL of 3% silver...

Embodiment 2

[0041] Embodiment 2 prepares the composite material of alumina-loaded modified nano-titanium dioxide particles, comprising the following steps:

[0042] 1) Mix 20mL aluminum chloride and 20mL sodium carbonate, hydrolyze to obtain alumina hydrate, conduct hydrothermal treatment at 180°C for 2h, dry at 120°C, add 6mL hydrochloric acid, 2mL silica sol and 0.28g fish oil to obtain alumina sol;

[0043] 2) Drop the alumina sol into the mineral oil in the oil layer, form spherical sol particles by the effect of surface tension, then gel the sol particles in ammonia water, and finally dry and calcinate the gel particles to form spherical alumina with a diameter of 3~5mm.

[0044] 3) Add 5 mL of tetrabutyl titanate dropwise to 22 mL of isopropanol, stir vigorously at room temperature for 30 minutes, and adjust the pH with concentrated nitric acid until pH = 3 to obtain solution A; mix 3.5 mL of secondary water and 4.2 Mix mL of isopropanol and stir for 10 minutes to obtain solution ...

Embodiment 3

[0049] Example 3 The preparation of a composite material of alumina-supported modified nano-titanium dioxide particles includes the following steps:

[0050] 1) Mix 20mL aluminum chloride and 27mL sodium carbonate, hydrolyze to get alumina hydrate, hydrothermally treat alumina hydrate at 180°C for 2h, dry at 120°C, add 20mL hydrochloric acid, 2mL silica sol and 0.40g fish oil to obtain alumina sol;

[0051] 2) Drop the alumina sol into paraffin, form spherical sol particles by the action of surface tension, then gel the sol particles in ammonia water, and finally dry and calcinate the gel particles to form spherical alumina with a diameter of 3~ 5mm.

[0052] 3) Add 5 mL of tetrabutyl titanate dropwise to 30 mL of isopropanol, stir vigorously at room temperature for 30 minutes, and adjust the pH with concentrated nitric acid until pH = 3 to obtain solution A; mix 3.5 mL of secondary water and 6 mL Mix isopropanol and stir for 10 minutes to obtain solution B; add 1.23mL of 3%...

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Abstract

The present invention relates to an alumina-supported modified nanometer titanium dioxide particle composite material, a preparation method and applications thereof. According to the present invention, alumina is used as a carrier, and carrier preparing, modified nanometer titanium dioxide sol preparing, modified nanometer titanium dioxide particle loading, drying and other processes are performedto obtain the kitchen oil stain removing agent with functions of kitchen oil stain removing and water absorption, wherein the modified titanium dioxide can improve the problems of narrow light response range and low quantum efficiency of titanium dioxide; and the prepared kitchen oil stain removing agent has strong adsorption capacity, can remove oil stain while absorb moisture and partial harmful gases, can be recycled, is pollution-free, and can be used for purifying kitchen air and reducing the emission of oil fume.

Description

technical field [0001] The invention belongs to the technical field of nanometer material preparation, relates to a composite material of aluminum oxide-loaded modified nanometer titanium dioxide particles, a preparation method and application thereof, and is mainly used as a kitchen oil stain remover. Background technique [0002] Kitchen fume is the fume produced by cooking oil and food heated at high temperature. It is a mixed pollutant with complex components. It can invade the human respiratory tract with the air and cause different degrees of harm to the human body. The lesser degree of harm includes loss of appetite and upset. , lack of energy, drowsiness, fatigue and weakness, etc., and the more serious harms include tissue cell damage, decline in human immune function, gene mutation, chromosomal damage, and even carcinogenic functions. Kitchen fume is also one of the important pollution sources of PM2.5, which is also very harmful to the environment. Therefore, how...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J23/50C11D7/20
CPCC11D7/20B01J21/063B01J23/50B01J37/0207B01J37/0211B01J37/0213B01J35/396B01J35/50B01J35/39
Inventor 黄新文朱舒懿伊欣欣沈林叶徐璐
Owner ZHEJIANG UNIV OF TECH
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