Unlock instant, AI-driven research and patent intelligence for your innovation.

Porous photocatalysis and production thereof

A photocatalyst and porosity technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as ignoring operability and economy, and difficult to control moisture content

Inactive Publication Date: 2004-04-07
NAT INST OF ADVANCED IND SCI & TECH +2
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method still has the possibility of reabsorbing water vapor in the operation stage of reprocessing silica gel products, and it is difficult to control the moisture content
In addition, methods such as spraying a misty photocatalyst sol on the surface of silica gel, or exposing silica gel to high humidity for a long time, but these are methods that ignore operability and economy

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1 (preparation method of hydrogel)

[0012] Two solutions of 100 parts by weight of sulfuric acid (20% by weight) and 100 parts by weight of sodium silicate (24 degrees Baume) were mixed and reacted, and washed with water to obtain a hydrogel. Dry the hydrogel, adjust the water content, and classify. At this time, it is best to keep the water content of the hydrogel between 30% and 80%. Especially when it is about 60%, it is the most productive and economical.

Embodiment 2

[0013] Embodiment 2 (preparation method of photocatalyst sol)

[0014] Dilute 60 g of titanium tetraisopropoxide with 500 ml of absolute ethanol. While stirring, 20 grams of diethanolamine and 5 grams of water were added. Then add 5 grams of polyethylene glycol with a molecular weight of 1000 to prepare a transparent sol.

Embodiment 3

[0015] Embodiment 3 (preparation method 1 of porous photocatalyst)

[0016] Put the hydrogel synthesized in Example 1 into the photocatalyst sol prepared in Example 2 and soak for 5 minutes, take it out, fully remove the photocatalyst sol, and dry at 170°C. Then the temperature is raised to 500°C for sintering, so that the crystal form of titanium dioxide is converted from rutile to anatase, thereby obtaining a porous photocatalyst.

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 porous photocatalyst which not generating a crack in a porous photocatalyst manufacturing process, having excellent production efficiency and economical efficiency and rich in safety, weatherability, stability and workability, and a method for manufacturing the same. The porous photocatalyst uses a hydrogel with a water content of 30-80% is used as a starting raw material and a porous titanium oxide membrane is applied to the porous surface.

Description

technical field [0001] The invention relates to a porous photocatalyst and a manufacturing method thereof. The photocatalyst can be used as an environmental purification material for removing various odors and harmful substances floating in the air, or for waste water treatment and water purification treatment. Background technique [0002] In recent years, the development of photocatalyst products with antibacterial, water purification, deodorization and deodorization, harmful gas removal, air purification and other functions is very popular. Among them, products using titanium oxide are increasing rapidly. For example, such products are mainly used in building materials, exterior wall materials, window paper, water purification devices, coatings and other places. Japanese Patent Application Laid-Open No. 7-303835 discloses a titanium oxide photocatalyst with excellent photocatalytic properties and a method for producing the same. And effectively remove substances such as...

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 Patents(China)
IPC IPC(8): B01D53/86B01J21/06B01J21/08B01J35/02B01J35/10B01J37/02
Inventor 垰田博史杨健
Owner NAT INST OF ADVANCED IND SCI & TECH