Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Nitrogen-phosphor codoping titanium oxide multi-stage aperture photocatalysis material and method for making same

A catalytic material, titanium oxide technology, applied in the direction of chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of nano-crystal particle agglomeration and growth, and achieve simple preparation process and equipment, good industrialization The effect of production prospects

Inactive Publication Date: 2007-08-08
NANKAI UNIV
View PDF1 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN1557540A discloses a preparation method of N-doped titanium oxide mesoporous photocatalytic material, which is similar to the methods reported in most documents and patents, using titanate and thiourea as raw materials to synthesize Ti-based precursors, and then using this precursor Calcined at no lower than 450°C in an ammonia atmosphere to obtain anatase phase N-doped TiO 2 , the material has high photocatalytic activity, however, high temperature calcination may lead to TiO 2 Agglomerated growth of nanocrystals and transition to rutile phase

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
  • Nitrogen-phosphor codoping titanium oxide multi-stage aperture photocatalysis material and method for making same
  • Nitrogen-phosphor codoping titanium oxide multi-stage aperture photocatalysis material and method for making same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Add 8.7 g of butyl titanate and n-propanol (mass ratio: 28:1) into 30 ml of phosphoric acid solution (pH=2), stir for 2 hours, and then transfer to an 80-degree autoclave for aging for 48 hours, take it out, wash it, and dry it at 60°C. Obtain precursor powder. Weigh 2g of the precursor, add 5ml of urea aqueous solution (2mol / L), stir for three hours, age at room temperature for 24 hours, dry, and roast at 350, 400, 450°C for 2 hours in an air atmosphere, and the obtained light yellow-brown powder is nitrogen Phosphorus co-doped macroporous-mesoporous titania. Figure 1 is its scanning electron micrograph, showing that the sample has regularly arranged macropore channels of 0.5-2 μm. Figure 2 is the nitrogen adsorption-desorption isotherm and the corresponding pore size distribution diagram, the mesopore diameter is 0.21-0.35nm, and the specific surface is as high as 272m 2 / g. Figure 3 is its XRD spectrum, which shows titanium oxide in anatase phase. Elemental anal...

Embodiment 2

[0032] Add 8.7g of butyl titanate into 30ml of phosphoric acid solution (pH=2), stir for 2 hours, then transfer to an 80-degree autoclave for aging for 48 hours, take it out, wash with distilled water, and dry at 60°C to obtain a precursor powder . Weigh 2 g of the precursor, add 5 ml of urea aqueous solution (2 mol / L), stir for three hours, age at room temperature for 24 hours, dry, and roast at 350, 400, and 450 °C for 2 hours in an air atmosphere, and the obtained light yellow-brown powder is Nitrogen and phosphorus co-doped macroporous-mesoporous titania. The XRD spectrum shows that the sample is anatase phase titanium oxide. Nitrogen adsorption analysis shows that the mesopore diameter is 0.27-0.36nm, and the specific surface is as high as 261m 2 / g. Elemental analysis showed that the sample contained 1.12% nitrogen and 1.32% phosphorus. Fig. 4 is a UV-vis absorption spectrum, which shows that the absorption side band of the titanium oxide material is red-shifted to 4...

Embodiment 3

[0034] Mix 20ml of urea aqueous solution (2mol / L) and phosphoric acid solution (pH=2), add 34.8g of n-butyl titanate, stir for 2 hours, then transfer to a 60-degree autoclave for aging for 48 hours, after taking out It was washed and dried at 60°C. The obtained solid powder was calcined at 350-550° C. for 6 hours in an air atmosphere to obtain a light yellow-brown powder sample, which is a titanium oxide material co-doped with nitrogen and phosphorus. The sample has macroporous channels regularly arranged around 2μm, the mesopore diameter is 2-5nm, and the specific surface is as high as 359m2 / g. Elemental analysis showed that the sample contained 1.5% nitrogen and 3.2% phosphorus.

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
Mesopore sizeaaaaaaaaaa
Mesopore diameteraaaaaaaaaa
Specific surfaceaaaaaaaaaa
Login to View More

Abstract

The invention discloses a titanium oxide porous optical catalyst and making method, which is made of nanometer titanium oxide with 0.14%-2.0% nitrogen and 1.3-19.7% phosphor to synthesize titanium based primer to sinter at 350-550 deg.c.

Description

technical field [0001] The invention relates to a nitrogen-phosphorus co-doped titanium oxide multi-level porous photocatalytic material and a preparation method thereof, belonging to the field of inorganic nano photocatalytic materials. Background technique [0002] Photocatalyst is a semiconductor material with photocatalytic activity under the irradiation of external light source. The preparation of semiconductor material used as photocatalyst is the core technology of photocatalytic oxidation. Anatase Phase Nano TiO 2 Photocatalysts are not only stable in chemical and optical properties, but also have high activity. They are currently the photocatalysts commonly used in photocatalytic technology. However, due to its wide forbidden band (Eg=3.2eV), it can only be excited by ultraviolet light (λ≤387.5nm) which accounts for only about 5% of sunlight, thus increasing its quantum yield and broadening the TiO 2 The response to visible light, which accounts for 46% of solar r...

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): B01J21/06B01J27/14
Inventor 袁忠勇邵高耸张雪军王震宇
Owner NANKAI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com