Photocatalyst solution for formaldehyde degradation under visible light, and preparation method thereof

A technology of photocatalyst and visible light, applied in separation methods, chemical instruments and methods, fibrous fillers, etc., can solve the problems of low utilization rate of sunlight and achieve the effect of improving steric hindrance and reducing sedimentation

Inactive Publication Date: 2015-03-11
BEIJING MEGA NANO TECH
View PDF5 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the wide band gap of titanium dioxide (Eg=3.2ev), only ultraviolet rays with wavelengths less than 387.5nm can be absorbed and utilized, and this part of ultraviolet rays (300-400nm) in sunlight only accounts for 4% of the sunlight reaching the ground. -6%, so the utilization of solar energy is very low

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
  • Photocatalyst solution for formaldehyde degradation under visible light, and preparation method thereof
  • Photocatalyst solution for formaldehyde degradation under visible light, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. In parts by mass, reflux 0.25 parts of nano-titanium oxynitride, 1 part of silane coupling agent KH550 and 1 part of anionic surfactant sodium dodecylbenzenesulfonate in an organic solvent petroleum ether in a water bath (60°C) for 6 hours, and then distilled and dried to obtain modified nano-titanium oxynitride powder.

[0025] 2. Add 3 parts of anchor chain polymer dispersant and 94.75 parts of deionized water to the modified nano-titanium oxynitride powder prepared in the first step, and disperse the above mixture through a high-pressure shear dispersion device (2000 revolutions per minute) , vacuum filtration, and buffer storage to obtain the photocatalyst solution.

Embodiment 2

[0027] 1. In parts by mass, put 1 part of nano-titanium oxynitride and 3 parts of silane coupling agent KH570 and 3 parts of cationic surfactant hexadecyltrimethylammonium bromide in an organic solvent petroleum ether in a water bath (60°C ) was refluxed for 6 hours, and then dried by distillation to obtain a modified nano-titanium oxynitride powder.

[0028] 2. Add 3 parts of anchor chain polymer dispersant and 90 parts of deionized water to the modified nano-titanium oxynitride powder prepared in the first step, and disperse the above mixture through a high-pressure shear dispersion device (2000 revolutions per minute) , vacuum filtration, and buffer storage to obtain the photocatalyst solution.

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 present invention discloses a photocatalyst solution for formaldehyde degradation under visible light, and a preparation method thereof. The raw materials comprise, by mass, 0.05-1% of nanometer titanium oxynitride, 1-5% of a silane coupling agent, 1-5% of an anionic or cationic surfactant, 1-5% of an anchor chain polymer dispersant, and 84-96.95% of deionized water. According to the present invention, based on the difficult dispersion of the nanometer titanium oxynitride in the deionized water, the nanometer powder is subjected to surface modification; the coupling agent is adopted to organically modify the nanometer titanium oxynitride, such that the nanometer powder surface is wrapped with a layer of the organic molecular film so as to increase the steric hindrance effect of the nanometer titanium oxynitride during the dispersion; the anionic or cationic surfactant is added to the nanometer titanium oxynitride solution, and the surfactant compounding is adopted to make the nanometer powder can be uniformly dispersed in the solution so as to reduce the sedimentation of the nanometer powder in the water; the photocatalyst solution of the present invention can lastingly and efficiently degrade the formaldehyde under the visible light, and the formaldehyde removal rate can achieve 87%; and the nanometer technology is adopted to degrade the formaldehyde, such that characteristics of stability, no toxicity and no harm on the environment are provided.

Description

technical field [0001] The invention relates to a photocatalyst solution and a preparation method thereof, in particular to a photocatalyst solution capable of continuously and efficiently degrading formaldehyde under visible light and a preparation method thereof, belonging to the fine chemical industry field. Background technique [0002] Photocatalyst (photocatalyst) is a compound word of light (photo=light) + catalyst (catalyst). Photocatalyst is usually the full name of photo-semiconductor materials with photocatalytic function of small particles of micron or even nanometer scale. It is the most ideal material for domestic and international control of indoor environmental pollution and formaldehyde pollution. [0003] Under the irradiation of sunlight or light, the photocatalyst will produce the same photoreaction as photosynthesis, and produce free H with strong oxidation ability. - and reactive oxygen species 2- , has a strong photoredox function, can oxidize and de...

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): B01J31/26B01J27/24B01D53/72B01D53/86C09C1/36C09C3/08C09C3/04
Inventor 张玉敏李真理
Owner BEIJING MEGA NANO 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