Imprinting-doped mesoporous TiO2 microspheres and preparation method and application thereof

A microsphere and mesoporous technology, applied in chemical instruments and methods, water/sludge/sewage treatment, organic compound/hydride/coordination complex catalysts, etc., can solve the problem of insufficient photocatalytic activity and absorption wavelength range Narrow, low quantum efficiency and other problems, to achieve high-efficiency photocatalytic degradation, wide application prospects, high photocatalytic efficiency

Inactive Publication Date: 2012-09-12
YUNNAN UNIV
View PDF5 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of this material is that the organic polymer modified layer is used, which is easily oxidized by the hydroxyl radicals produced by titanium dioxide, which makes the stability of the material not high and the service life not long.
[0007] (1) The photocatalyst obtained by preparing a layer of organic imprinted polymer with specific molecular recognition ability on the surface of titanium dioxide is not stable and has a short service life;
[0008] (2) with TiO 2 Prepared all-inorganic molecularly imprinted photocatalytic materials, du

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Imprinting-doped mesoporous TiO2 microspheres and preparation method and application thereof
  • Imprinting-doped mesoporous TiO2 microspheres and preparation method and application thereof
  • Imprinting-doped mesoporous TiO2 microspheres and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 1. In the first step, dissolve 2ml of butyl titanate in 150ml of ethanol, add 0.2g of dodecylamine and 0.8g of water, add 0.2g of BPA as imprinted molecules while stirring, and add zinc nitrate hexahydrate while stirring, The molar ratio of zinc nitrate hexahydrate to butyl titanate was 0.2%, and stirred gently for 5 hours.

[0043] 2. In the second step, the solution obtained in the first step was transferred to a high-temperature and high-pressure reactor, reacted at 120° C. for 5 hours, and then cooled to room temperature.

[0044] 3. In the third step, the solution obtained in the second step is centrifuged, and the obtained precipitate is washed three times with ethanol and ultrapure water respectively, and dried at 40°C.

[0045] 4. In the fourth step, put the dried powder into a muffle furnace and bake at 400°C for 3 hours to obtain imprinted doped mesoporous TiO 2 Microspheres.

[0046] 4mg TiO 2 Added to the mixed solution containing both target pollutant BP...

Embodiment 2

[0048] 1. In the first step, dissolve 3ml of butyl titanate in 150ml of ethanol, add 0.2g of dodecylamine and 0.8g of water, add 0.2g of BPA as imprinted molecules while stirring, and add zinc nitrate hexahydrate while stirring, The molar ratio of zinc nitrate hexahydrate to butyl titanate was 0.2%, and stirred gently for 6 hours.

[0049] 2. In the second step, transfer the solution obtained in the first step to a high-temperature and high-pressure reactor, react at 120° C. for 5 hours, and then cool to room temperature.

[0050] 3. In the third step, the solution obtained in the second step is centrifuged, and the obtained precipitate is washed three times with ethanol and ultrapure water respectively, and dried at 40°C.

[0051] 4. In the fourth step, put the dried powder into a muffle furnace and bake at 400°C for 3 hours to obtain imprinted doped mesoporous TiO 2 Microspheres.

[0052] 4mg TiO 2 Added to the mixed solution containing both target pollutant BPA and non-t...

Embodiment 3

[0054] 1. In the first step, dissolve 4ml of butyl titanate in 150ml of isopropanol, add 0.2g of dodecylamine and 0.8g of water, add 0.2g of BPA as imprinted molecules while stirring, and add nitric acid hexahydrate while stirring Zinc, the molar ratio of zinc nitrate hexahydrate to butyl titanate is 0.2%, and stirred gently for 5 hours.

[0055] 2. In the second step, transfer the solution obtained in the first step to a high-temperature and high-pressure reactor, react at 120° C. for 5 hours, and then cool to room temperature.

[0056] 3. In the third step, the solution obtained in the second step is centrifuged, and the obtained precipitate is washed three times with ethanol and ultrapure water respectively, and dried at 40°C.

[0057] 4. In the fourth step, put the dried powder into a muffle furnace and bake at 400°C for 3 hours to obtain imprinted doped mesoporous TiO 2 Microspheres.

[0058] 4mg TiO 2 Added to the mixed solution containing both target pollutant BPA an...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a synthesis method and application for imprinting-doped mesoporous TiO2 microspheres. The synthesis method includes dissolving 1-5ml of titanium source substances into 100-200ml of organic solution, adding 0.1-0.3g of catalytic into the organic solution, adding 0.1-0.5g of target molecules used as imprinting molecules while stirring the mixture, and further adding metal salt with the molar ratio ranging from 0.1% to 8% relative to a titanium source so as to introducing doping ions; and continuing stirring for 1-12 hours, then enabling the solution to react in a high-temperature and high-pressure kettle at the temperature ranging from 80 DEG C to 180 DEG C for 3-6 hours, centrifugally washing to obtain white solid, placing the white solid in a muffle furnace at the temperature ranging from 400 DEG C to 450 DEG C, keeping the temperature for 2-4 hours and then obtaining the imprinting-doped mesoporous TiO2 microspheres. The prepared materials are used for degrading target organic pollutant in water, have higher photocatalytic activity as compared with pure TiO2(P25), and are capable of selectively degrading the target pollutant. In addition, the imprinting-doped mesoporous TiO2 microspheres have a wider photoresponse range as compared with pure TiO2 undoped with imprinting, and have high visible light absorption capacity.

Description

technical field [0001] The invention belongs to the field of semiconductor photocatalysts, in particular to a mesoporous titanium dioxide (TiO2) containing molecular imprints of organic pollutants and doped with metal ions. 2 ) microspheres and their preparation and use. Background technique [0002] Environmental endocrine disruptors refer to exogenous substances that intervene in the synthesis, secretion, in vivo transport, combination, action or decomposition of hormones in organisms, thereby affecting the normal maintenance of organisms, endangering reproduction, development or behavior, which can lead to a series of Biological damage, such as reproductive disorders and deformation of sexual organs, sex reversal, feminization, etc. Many chemicals in the environment have endocrine disrupting effects, including many refractory persistent organic pollutants (such as polychlorinated biphenyls, dioxins, organochlorine pesticides, etc.). Bisphenol A (BPA) is a plastic additi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01J31/38B01J27/24B01J35/08C02F1/30C02F1/58C02F101/34C02F101/36
Inventor 蒋峰芝王娟沙朝金袁波
Owner YUNNAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap