Method for producing alta-mud load TiO2 catalyst with metal organic chemical vapor deposition

A metal organic chemistry and vapor deposition technology, applied in gaseous chemical plating, metal material coating process, coating and other directions, to achieve the effect of good adsorption performance, less variety of materials, and simple equipment

Inactive Publication Date: 2008-07-16
ZHEJIANG UNIV
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using the MOCVD method, Li Lina et al prepared TiO on Si and glass respectively 2 Thin film, Zhang Xingwang et al prepared TiO with activated carbon as the carrier 2 thin film, and some people have prepared this kind of catalyst thin film on metal sheets and ceramic sheets, but there is no literature report to make TiO 2 Deposited on the excellent carrier of photocatalyst - bentonite

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
  • Method for producing alta-mud load TiO2 catalyst with metal organic chemical vapor deposition
  • Method for producing alta-mud load TiO2 catalyst with metal organic chemical vapor deposition
  • Method for producing alta-mud load TiO2 catalyst with metal organic chemical vapor deposition

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] The preparation principle of the present invention is:

[0023] MOCVD (metal-organic chemical vapor deposition) reaction mechanism is a growth mechanism under non-equilibrium state. Its principle is the process of using gas phase reactants or precursors to react on the surface of the substrate to form solid deposits on the surface of the substrate. . The reactive deposition process can be expressed as follows:

[0024] (CH 3 CH 3 CHO) 4 Ti(g)+K→L(g)

[0025] L(g)+X→L(a)

[0026] L(a)→M(g)+TiO 2 (s)

[0027] In the above formula (CH 3 CH 3 CHO) 4 Ti is the organic precursor tetraisopropyl titanate, K is the carrier gas, X is the growth point on the surface of the carrier, L(g) and L(a) are activated intermediates, and M is the decomposition byproduct.

[0028] The main component of bentonite is montmorillonite. Montmorillonite is a 2:1 layered silicate mineral and belongs to the monoclinic crystal system. The unit cell is composed of two layers of silicon-oxygen tetrahedrons...

Embodiment 1

[0030] The bentonite loaded nanometer titanium dioxide catalyst of the present invention is a kind of composite material obtained by depositing nanometer titanium dioxide particles on the surface of the bentonite, and has the function of integrating adsorption and photocatalysis to degrade organic matter in waste water and exhaust gas.

[0031] The preparation method of bentonite-supported nano titanium dioxide in this embodiment is as follows:

[0032] 1) Put 5g aluminum pillared bentonite (Al-PILCS) with 100 meshes into the quartz reactor, open the drying gas path, and dry with nitrogen for 30 minutes, and the nitrogen flow rate is 0.1m3 / h;

[0033] 2) Close the drying gas path, open the reaction gas path, adjust the nitrogen flow rate to 0.4m3 / h, heat the quartz reactor to 550°C, the temperature rise time is 30 minutes, and heat the tetraisopropyl titanate to 60°C in a water bath to make the titanium The tetraisopropyl acid volatilizes into the quartz reactor and reacts for 3 h...

Embodiment 2

[0037] The difference from Example 1 is that the original bentonite clay is used as the supporting material for the test, and the bentonite of the present invention is prepared with TiO 2 powder. Proceed as follows:

[0038] 1) Put 5g of bentonite with 100 meshes into a quartz reactor, open the drying gas path, and dry with nitrogen for 30 minutes, with a nitrogen flow rate of 0.1m3 / h;

[0039] 2) Close the dry gas path, open the reaction gas path, and adjust the nitrogen flow rate to 0.4m 3 / h, the quartz reactor is heated to 550°C, the heating time is 30 minutes, and the tetraisopropyl titanate is heated to 60°C in a water bath to volatilize the tetraisopropyl titanate into the quartz reactor and react for 3 hours;

[0040]3) After the reaction, continue to pour nitrogen into the reactor to remove residual tetraisopropyl titanate, and calcinate under the protection of nitrogen for 1 hour. The calcining temperature is 550°C to make TiO 2 Complete growth and cooling to obtain alum...

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 discloses a method for preparing bentonite loaded with TiO2 catalysts with metallic organic chemical vapor deposition and comprises the following steps: 1) 5 to 20g more than 40 to 100 meshes of bentonite or Al pillared bentonite is put into a quartz reactor, a drying gas channel is opened; the nitrogen is communicated for drying for 10 to 60 minutes with the flow speed of 0.1 to 0.3m3/h; 2) the drying gas channel is closed; the reaction gas channel is opened and the flow speed of the nitrogen is adjusted into 0.18 to 0.6m3/h; the quartz reactor is heated and the temperature raises to 500 - 1000 DEG C for 10 to 30 minutes; the titanium tetraisopropoxide in water bath is heated to 30 to 80 DEG C to lead the titanium tetraisopropoxide to evaporate into the quartz reactor to react for 2 to 5 hours; 3) the nitrogen is communicated continuously into the reactor after the reaction is over so as to remove the residual titanium tetraisopropoxide; calcinations are done with the protection of the nitrogen for 1 - 3 hours with the calcinations temperature of 500 to 1000 DEG C to cause the TiO2 to grow fully, with cooling down as the final step. The method is simple in the preparation process of the novel catalyst, high in the uniformity of the loaded TiO2 film, low in cost, easy in maintenance and can realize a plurality of times of loading and doping and is easily applied in large scale industrial production.

Description

Technical field [0001] The invention relates to a metal organic chemical vapor deposition method for preparing bentonite loaded TiO 2 Catalyst method. It is a photocatalyst that can realize the integrated treatment of organic pollutants by adsorption and photocatalysis. It is mainly used for environmental treatment, such as purification treatment of wastewater and indoor gas pollution. Background technique [0002] The research of high-efficiency photocatalysts has always been one of the research hotspots at home and abroad. Among many photocatalytic materials, TiO 2 As an efficient, non-toxic, stable and easy-to-use photocatalyst, it can effectively degrade organic pollutants in sewage and exhaust gas. It is a photocatalyst with the most potential and has a wide range of application prospects. However, using ultra-fine powder TiO 2 Wastewater treatment has shortcomings such as easy agglomeration, difficulty in recycling, and high input. At the same time, suspended particles will...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C23C16/40C23C16/455C23C16/52C23C16/56
Inventor 沈学优陈侠胜陈坤洋陈曙光李爽
Owner ZHEJIANG 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