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

Process of preparing micron level ordered porous aza titania microsphere

A micron-sized titanium oxide technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of large loss of active components, difficult recovery of catalysts, unfavorable catalyst regeneration and reuse, etc. achieve good sphericity

Inactive Publication Date: 2009-08-12
WUHAN INSTITUTE OF TECHNOLOGY
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the application of titanium dioxide photocatalyst in the actual pollutant treatment has achieved certain results, but when the nano-powder suspension system is used for photocatalysis, due to its fine particles, it is not easy to precipitate, the catalyst is difficult to recycle, and the loss of active components is large. Conducive to catalyst regeneration and reuse

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
  • Process of preparing micron level ordered porous aza titania microsphere
  • Process of preparing micron level ordered porous aza titania microsphere

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 As shown, 3 g of polystyrene microspheres (PS) (microsphere particle size: 190 nm) emulsion with a mass fraction of 1.5% were dispersed in 60 g of methyl silicone oil with a viscosity of 100 cst to form a suspension, and the stirring speed was controlled at 400 rpm. Stir at constant temperature at 60°C for 6 hours, then raise the temperature to 80°C and continue to stir for 12 hours. As the water in the suspension continues to volatilize, polystyrene microspheres (PS) gather together to form large microspheres, and a suspension containing large microspheres is obtained. liquid; use a 350-mesh sieve to filter the suspension containing the large microspheres to obtain large microspheres with a particle size of 80 μm formed by the aggregation of polystyrene microspheres (PS).

[0028] Then wash the large microspheres with normal hexane, isopropanol and ethanol respectively, to remove the residual methyl silicone oil on the surface, after vacuum drying at 5...

Embodiment 2

[0031]Disperse 3.2g of polymethyl methacrylate microspheres (PMMA) (microsphere particle size: 500nm) emulsion with a mass fraction of 2.5% in 65g of methyl silicone oil with a viscosity of 200cst to form a suspension, and control the stirring speed to 380rpm, Stir at a constant temperature of 60°C for 6 hours, then raise the temperature to 80°C and continue to stir for 12 hours. As the water in the suspension continues to volatilize, polymethyl methacrylate microspheres (PMMA) gather together to form large microspheres, and a large microsphere is obtained. Suspension of microspheres; the suspension containing large microspheres is filtered with a 350-mesh sieve to obtain large microspheres formed by aggregation of polymethylmethacrylate microspheres (PMMA) with a particle size of 150 μm.

[0032] Then wash the large microspheres with n-hexane, isopropanol and ethanol respectively to remove the residual methyl silicone oil on the surface, and dry them under vacuum at 50° C. for...

Embodiment 3

[0035] Disperse 3.5g of 3.0% poly(styrene-acrylic acid) copolymer microspheres (microspheres with a particle size of 600nm) emulsion in 70g of simethicone oil with a viscosity of 500cst to form a suspension, and control the stirring speed to 500rpm , stirred at a constant temperature at 60°C for 6 hours, then raised the temperature to 80°C and continued to stir for 12 hours. As the water in the suspension continued to volatilize, the poly(styrene-acrylic acid) copolymer microspheres gathered together to form large microspheres, and obtained Suspension of large microspheres; the suspension containing large microspheres is filtered with a 350-mesh sieve to obtain large microspheres formed by aggregation of poly(styrene-acrylic acid) copolymer microspheres with a particle size of 180 μm.

[0036] Then wash the large microspheres with n-hexane, isopropanol and ethanol respectively to remove the residual simethicone oil on the surface, dry them under vacuum at 50°C for 12h, and then...

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 relates to a method for preparing micron-scale ordered porous nitrogen heterotitanium oxide microspheres. It is characterized in that it includes the following steps: 1) dispersing monodisperse polymer microsphere emulsion with a mass fraction of 1.0% to 5.0% in hydrophobic silicone oil with a viscosity of 50 to 1000cst to form a suspension, wherein the mass fraction is 1.0% to 5.0 The mass ratio of the monodisperse polymer microsphere emulsion and the hydrophobic silicone oil with a viscosity of 50-1000cst is 2.5-3.5g: 60-70g to prepare large microspheres; 2) wash the large microspheres, dry them, and use titanium dioxide precursor The large microspheres were soaked in the body solution for 7 days, and then filtered through a 350-mesh screen to obtain micron-sized ordered porous titanium dioxide microspheres; 3) micron-sized ordered porous titanium dioxide microspheres were placed in a microwave plasma generator and processed Micron-scale ordered porous titanium oxide microspheres. The preparation process of the invention is simple, and the prepared titanium nitrogen oxide microspheres have ordered pores and visible light catalytic performance, and the porous structure is not easy to be destroyed.

Description

technical field [0001] The invention belongs to the field of porous photocatalytic materials, and in particular relates to a method for preparing micron-scale ordered porous nitrogen heterotitanium oxide microspheres. Background technique [0002] Anatase nano-titanium dioxide can decompose toxic chemicals, smog residues, odorous chemicals, dirt, irritants, bacteria, etc. into non-toxic and non-polluting substances by ultraviolet light irradiation. When ultraviolet (wavelength <388nm) irradiation The electrons in its valence band are excited to form negatively charged highly active electrons, and at the same time generate positively charged valence band holes. The electrons and holes are separated and migrate to different positions on the particle surface. The holes and electrons react with water and oxygen on the surface, respectively, to generate highly reactive hydroxyl radicals and superoxide ion radicals, which can efficiently decompose toxic chemicals. Therefore, i...

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): B01J21/06
Inventor 刘长生李俊韦磊邓仕英李铭果朱仕惠
Owner WUHAN INSTITUTE OF TECHNOLOGY