Nano photocatalyst of possessing function of molecular engram, preparation method and usage

A nano-photocatalyst and molecular imprinting technology, applied in separation methods, catalyst carriers, chemical instruments and methods, etc., can solve problems such as difficulty in obtaining high degradation efficiency, high migration or recombination rate, and low rate of product desorption, and achieve Improve indoor air quality, obvious economic benefits, and improve the effect of adsorption

Inactive Publication Date: 2007-02-21
ZHEJIANG UNIV
View PDF0 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] But TiO 2 The photocatalysis has the following problems: low quantum efficiency (about 4%); high electron-hole pair generation, migration or recombination rate; reaction species adsorption on the catalyst surface, catalytic react

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
  • Nano photocatalyst of possessing function of molecular engram, preparation method and usage

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0041] Example 1

[0042] (1) Select formaldehyde as template molecule and activated carbon as mesoporous material;

[0043] (2) adsorption of formaldehyde on activated carbon to saturation to form a composite of activated carbon|formaldehyde;

[0044] (3) Using n-butyl titanate as a sol precursor, ethanol as a solvent, and protonic acid as an inhibitor, a sol-gel method was adopted, and the molar ratio of n-butyl titanate, ethanol, water, and protonic acid was 1: 20:3:15 mixing to obtain TiO 2 gel;

[0045] (4) The prepared TiO 2 The gel was coated on the surface of the activated carbon|formaldehyde composite prepared in (2) according to the molar ratio of n-butyl titanate: activated carbon of 1:15 to form activated carbon|formaldehyde|TiO 2 The "sandwich" structure of the gel;

[0046] (5) The "sandwich" structure obtained in (4) was calcined at 600° C. for 4 h, crushed, and removed by membrane removal to remove activated carbon and formaldehyde to form a nano-photocata...

Example Embodiment

[0048] Example 2

[0049] According to the steps of Example 1, using benzene as a template molecule and activated carbon as a mesoporous material, a composite of activated carbon and benzene was prepared; using n-butyl titanate as a gel precursor, according to The molar ratio of protonic acids is 1:2:10:3 to prepare TiO 2 Gel; according to the molar ratio of n-butyl titanate: activated carbon is 1:5, TiO 2 Gel is coated on the surface of activated carbon|benzene composite to form activated carbon|benzene|TiO 2 The "sandwich" structure of the gel was calcined at 350 °C for 4 hours, and then the activated carbon and benzene were removed by crushing and stripping to obtain a nano-photocatalyst with specific adsorption and degradation function for benzene.

[0050] Taking formaldehyde and benzene as target pollutants, the catalyst performance was evaluated in a continuous flow photocatalytic reaction system. The initial concentrations of formaldehyde and benzene in the system w...

Example Embodiment

[0051] Example 3

[0052] According to the steps of Example 1, using toluene as template molecule and activated carbon as mesoporous material, the composite of activated carbon and toluene was prepared; The molar ratio of protonic acid is 1:5:5:8 to prepare TiO 2 Gel; according to the molar ratio of n-butyl titanate: activated carbon is 1:2, TiO 2 Gel is coated on the surface of activated carbon|toluene composite to form activated carbon|toluene|TiO 2 The "sandwich" structure of the gel was calcined at 500 °C for 4 hours, and then the activated carbon and toluene were removed by crushing and stripping to obtain a nano-photocatalyst with specific adsorption and degradation function for toluene.

[0053] Taking formaldehyde and toluene as target pollutants, the catalyst performance was evaluated in a continuous flow photocatalytic reaction system. The initial concentrations of formaldehyde and toluene in the system are both 10mg / m 3 , the humidity is 60%, the reaction temper...

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

A nano-photocatalyst with molecular engram function has a 3D pore structure matched fully with the space structure of the compounds in formaldehyde or benzene system and combined specifically with them. It can be used to improve indoor air by adsorbing and degradating said compounds. Its preparing process is also disclosed.

Description

technical field [0001] The invention relates to a photocatalyst, in particular to a nanometer photocatalyst with molecular imprinting function, a preparation method and the application of photocatalytic degradation of indoor volatile organic compounds. Background technique [0002] About 70% to 90% of people's life is spent indoors, and the indoor environment has a particularly important impact on people's health. Volatile organic compounds (VOCs) such as formaldehyde and benzene series (benzene, toluene, xylene) in indoor air are a class of organic pollutants that are ubiquitous in indoor air. It is known that many VOCs, especially formaldehyde and benzene series, which are ubiquitous in indoor air, have neurotoxicity, nephrotoxicity, hepatotoxicity and carcinogenicity, and can also damage blood components and cardiovascular system, cause gastrointestinal disorders, and seriously harm the human body. human health. The treatment of indoor air VOCs has become one of the int...

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): B01J21/06B01J32/00B01D53/44B01D53/86
Inventor 赵伟荣吴忠标曹振娟
Owner ZHEJIANG UNIV
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