Fresh air purifying photocatalysis technology for fresh air system

A fresh air system and photocatalyst technology, applied in the field of photocatalysis technology, can solve the problems of unreachable removal, unsatisfactory air purification effect, and deterioration of air quality

Inactive Publication Date: 2016-10-19
JIANGSU HONGZHU ENVIRONMENTAL SCI & TECH
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in recent years, due to factors such as motor vehicle exhaust emissions, industrial exhaust emissions, and engineering construction, the air quality outside urban buildings has caused high concentrations of pollution, especially in hazy days. The role of natural ventilation is no longer to dilute indoor air pollutio

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

[0007] Weigh 14.6g of tetrabutyl titanate and dissolve it in 100mL of dehydrated ethanol, and stir it magnetically to make it completely dissolved. Dissolve 2.2g of cetyltrimethylammonium bromide and 1.5g of citric acid in 50mL of deionized water. Mix the two solutions to form a suspension; move the suspension into a polytetrafluoroethylene-lined crystallization reactor and react at 150°C for 8 hours. After the reaction is complete, cool the reactor to room temperature and The product was centrifuged to separate the precipitate, washed 6 times with deionized water and absolute ethanol, and filtered with suction. The obtained sample was dried in an oven at 110°C for 12 hours to obtain a powder, and then roasted in a muffle furnace at 450°C for 3 hours, and the temperature was raised At a rate of 1°C / min, TiO with a mesoporous structure was obtained 2 The photocatalyst is ground, pressed into tablets, and then ground and sieved to obtain 20-40 mesh particles. The formaldehyde ph...

Embodiment 2

[0009] Weigh 11.1g of ethyl titanate and dissolve it in 100mL of dehydrated ethanol, stir it magnetically to dissolve it completely, dissolve 3.9g of sodium dodecylbenzenesulfonate and 2.8g of tartaric acid in 50mL of deionized water, and mix the two solutions Mix to form a suspension; move the suspension into a polytetrafluoroethylene-lined crystallization reactor and react at 200°C for 12 hours. After the reaction is complete, cool the reactor to room temperature and centrifuge the reaction product Precipitate, wash 8 times with deionized water and absolute ethanol respectively, and filter with suction. The obtained sample is dried in an oven at 110°C for 12 hours to obtain a powder, and then roasted in a muffle furnace at a temperature of 500°C for 3 hours, and the heating rate is 3°C / min, to obtain TiO with mesoporous structure 2 The photocatalyst is ground, pressed into tablets, and then ground and sieved to obtain 20-40 mesh particles. The formaldehyde photocatalytic re...

Embodiment 3

[0011] Weigh 18.9g of isopropyl titanate and dissolve it in 100mL of dehydrated ethanol, stir it magnetically to dissolve it completely, dissolve 4.7g of ethylenediaminetetraacetic acid and 2.8g of malic acid in 50mL of deionized water, and mix the two solutions Form a suspension; move the suspension into a crystallization reactor with a polytetrafluoroethylene liner, and react at 180°C for 12 hours. After the reaction is completed, cool the reactor to room temperature, and centrifuge the reaction product to separate the precipitate , washed 6 times with deionized water and absolute ethanol respectively, and suction filtered. The obtained sample was dried in an oven at 120°C for 18 hours to obtain a powder, and then calcined in a muffle furnace at a temperature of 550°C for 3 hours at a heating rate of 5°C / min, to obtain TiO with mesoporous structure 2 The photocatalyst is ground, pressed into tablets, and then ground and sieved to obtain 20-40 mesh particles. The formaldehyd...

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 photocatalyst for removing volatile organic compounds (VOCs) contained in fresh air which is inhaled into indoor by a fresh air system. A hydrothermal synthesis method is used for preparing a TiO2 material with a mesoporous structure and a high photocatalytic activity, and a photocatalyst prepared by the method has the mesoporous structure and high photocatalysis efficiency for removing formaldehyde. The invention is characterized in that a preparation method comprises the following steps: a certain amount of titanium alkoxide is dissolved into absolute ethyl alcohol, and a solution A is prepared; a template whose mass percentage is 15-35% and a chelating agent whose mass percentage is 10-25% (the mass percentages are calculated based on the titanium alkoxide raw material) are dissolved into deionized water, and a solution B is prepared; the solution A and the solution B are mixed in order to prepare suspension liquid; the suspension liquid is transferred to a crystallization reaction vessel whose inner liner is made from polytetrafluoroethylene, a reaction is carried out at 150-220 DEG C for 6-24 hours, the reaction vessel is cooled to a room temperature, centrifugation is carried out for reaction products in order to obtain precipitation, deionized water and absolute ethyl alcohol are used for cleaning for 5-10 times, pumping filtration is carried out in order to obtain a sample, and the sample is dried in a baking oven at 100-120 DEG C for 12-24 hours in order to obtain powder; the powder is placed in a muffle furnace, the muffle furnace is heated at a speed of 1-5 DEG C/min to 450-650 DEG C, calcination is carried out for 3-5 hours, and the TiO2 photocatalyst with the mesoporous structure is obtained.

Description

technical field [0001] The invention belongs to the field of fresh air equipment, and in particular relates to a photocatalytic technology for purifying fresh air in a clean fresh air system. Background technique [0002] At present, a large number of civil buildings in China mostly rely on natural ventilation to achieve indoor ventilation. However, in recent years, due to factors such as motor vehicle exhaust emissions, industrial exhaust emissions, and engineering construction, the air quality outside urban buildings has caused high concentrations of pollution, especially in hazy days. The role of natural ventilation is no longer to dilute indoor air pollution, but to worsen indoor air quality. Some buildings use a fresh air system. Although the fresh air system has a good function of sterilizing and filtering particulate matter, it cannot remove the volatile organic compounds (VOCs) contained in the inhaled outdoor air, and cannot achieve a satisfactory air purification ...

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): B01J21/06C01G23/053B01D53/86B01D53/72
CPCY02A50/20
Inventor 丁建飞陈桂太胡庆春王新
Owner JIANGSU HONGZHU ENVIRONMENTAL SCI & 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