Composite separating membrane of Si-doped TiO2 nanotube and its preparing method and application

A nanotube composite and titanium dioxide technology, which is applied in the field of silicon-doped titanium dioxide nanotube composite separation membrane and its preparation, can solve the problems of low photocatalytic activity and application stability of the catalyst, inability to effectively inhibit the growth of titanium dioxide grains, and small loading area.

Active Publication Date: 2007-06-27
DALIAN UNIV OF TECH
View PDF1 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Inorganic ceramic membrane has more practical application value and prospect. It has the advantages of high temperature resistance, good chemical stability, high mechanical strength, strong anti-microbial ability and narrow pore size distribution range; however, its disadvantages are: small filling area, The operating cost is high, the membrane is easy to pollute, and the separated pollutants need secondary treatment. In the separation process, the membrane only plays a simple filtering function, and the membrane separation cannot completely decompose and remove the pollutants.
[0005] Although photocatalytic technology has many advantages, this method is difficult to industrialize. The main problems are: (1) powder catalyst particles are easy to lose with the treatment liquid or treatment gas, and are difficult to recycle; TiO 2 Photocatalysts usually have a narrow spectral utilization range, weak surface hydrophilicity, and low mechanical strength, resulting in low photocatalytic activity and application stability of the catalyst.
[0006] B

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
  • Composite separating membrane of Si-doped TiO2 nanotube and its preparing method and application
  • Composite separating membrane of Si-doped TiO2 nanotube and its preparing method and application
  • Composite separating membrane of Si-doped TiO2 nanotube and its preparing method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] When the permeation flux of the composite separation membrane is not large or the pore size is small, the silicon-doped titanium dioxide nanotube composite separation membrane prepared under the following conditions can be used.

[0050] Use ZrO with a pore size of 10nm, a pore spacing of 30-70nm, and a porosity of 30%. 2 The inorganic membrane is used as a carrier to prepare a silicon-doped titanium dioxide nanotube composite separation membrane with a pore size of 1-8 nm. The steps are:

[0051] The first step, the pretreatment of the carrier

[0052] ZrO 2 After the inorganic membrane was washed with deionized water and dried at 50°C, it was naturally lowered to room temperature for later use;

[0053] The second step, the preparation of silicon-doped titania sol

[0054] Titanium isopropoxide Ti(Oi-C 3 h 7 ) 4 and methyl orthosilicate Si(OCH 3 ) 4 Add 1 part to 0.5 part of absolute ethanol according to the proportion of 5% silicon-doped molar percentage, and...

Embodiment 2

[0059] For the treatment of wastewater with large molecular size, such as dyes, polychlorinated biphenyls, etc., the silicon-doped titanium dioxide nanotube composite separation membrane prepared under the following conditions is applied.

[0060] Al with a pore diameter of 100nm, a pore spacing of 30-60nm, and a porosity of 40% 2 o 3 The inorganic membrane is used as a carrier to prepare a silicon-doped titanium dioxide nanotube composite separation membrane with a pore size of 10-50 nm. The steps are:

[0061] The first step, the pretreatment of the carrier

[0062] Al 2 o 3 After the inorganic membrane was washed with deionized water and dried at 70°C, it was naturally lowered to room temperature for later use;

[0063] The second step, the preparation of silicon-doped titania sol

[0064] Titanium isopropoxide Ti(Oi-C 3 h 7 ) 4 and tetraethyl orthosilicate Si(OC 2 h 5 ) 4 Add 1 part to 2 parts of absolute ethanol according to the ratio of 20% silicon-doped molar...

Embodiment 3

[0069] Al with a pore size of 200nm, a pore spacing of 20-150nm, and a porosity of 50% 2 o 3 The inorganic membrane is used as a carrier to prepare a silicon-doped titanium dioxide nanotube composite separation membrane with a pore size of 50-200 nm. The steps are:

[0070] The first step, the pretreatment of the carrier

[0071] Al 2 o 3 After washing with deionized water and drying at 100°C, cool down to room temperature naturally for later use;

[0072] The second step, the preparation of silicon-doped titania sol

[0073] Titanium isopropoxide Ti(Oi-C 3 h 7 ) 4 and tetraethyl orthosilicate Si(OC 2 h 5 ) 4 Add 1 part to 0.5 parts of absolute ethanol according to the ratio of silicon-doped molar percentage of 50%, and stir the mixed solution vigorously; Add to the above solution. The light yellow transparent sol was obtained by slow hydrolysis of sol-gel.

[0074] The third step, preparation of silicon-doped titania nanotube composite separation membrane

[007...

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

PropertyMeasurementUnit
Apertureaaaaaaaaaa
Inner diameteraaaaaaaaaa
Outer diameteraaaaaaaaaa
Login to view more

Abstract

The present invention relates to membrane technology, and is especially composition separating membrane of Si-doped TiO2 nanotube and its preparation and application. The process of preparing composition separating membrane of Si-doped TiO2 nanotube includes the following steps: cleaning and stoving porous inorganic ceramic membrane carrier with pores of 10-200 nm diameter, preparing TiO2 sol containing Si in 5-50 mol%, soaking the carrier in the sol, drying, roasting at 400-700 deg.c, and cooling to obtain the composition separating membrane with TiO2 nanotube of inside diameter 1-200 nm. The composition separating membrane of Si-doped TiO2 nanotube is used in water treatment.

Description

technical field [0001] The invention relates to a separation membrane product and its preparation method and application, more specifically, to a silicon-doped titanium dioxide nanotube composite separation membrane using porous inorganic ceramic membranes as a carrier and template, and its preparation method and application, belonging to the field of membrane technology . Background technique [0002] Membrane separation technology is a gas-phase or liquid-phase separation process under the driving force of pressure difference. It has attracted widespread attention because of its obvious advantages such as no phase change, low energy consumption, simple equipment, and less land occupation. Membrane separation technology has been initially industrialized, and ultrafiltration and microfiltration technology first appeared. In 1918, Zsigmondy proposed the preparation method of commercial microfiltration membrane, which was patented in 1921. With the development of membrane se...

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): B01D71/02B01J21/06B01J37/03B01J32/00B01J35/02C02F1/00
Inventor 全燮张海民马宁赵慧敏赵雅芝陈硕
Owner DALIAN UNIV OF TECH
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