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

Catalytic nanoparticle-containing microporous chitosan particles and application thereof

A nano-catalysis, chitosan technology, applied in the separation of dispersed particles, physical/chemical process catalysts, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problem of unfavorable recycling, low treatment concentration, secondary pollution and other problems, to achieve the effect of effective adsorption, uniform distribution and strong adsorption performance

Inactive Publication Date: 2018-09-21
NANTONG UNIVERSITY
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Photocatalytic oxidation can effectively decompose organic pollutants such as aldehydes, aromatic hydrocarbons, aliphatic hydrocarbons, alcohols, aldehydes, ketones, halogenated hydrocarbons and mercaptans, and remove inorganic pollutants such as nitrogen oxides, sulfur oxides, hydrogen sulfide and ammonia It can effectively kill most bacteria and viruses exposed to the air, but a single nano-TiO 2 It is only suitable for treating organic pollutants with low concentration and quantity, and nano-TiO 2 It usually exists in the form of powder, which is not only not conducive to recycling, but also causes secondary pollution

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
  • Catalytic nanoparticle-containing microporous chitosan particles and application thereof
  • Catalytic nanoparticle-containing microporous chitosan particles and application thereof
  • Catalytic nanoparticle-containing microporous chitosan particles and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 Preparation of mesoporous chitosan particles containing nano-catalyst particles

[0026] Sample 1: Dissolve chitosan (deacetylation degree is above 80%, molecular weight is 5000-200,000) with 2% acetic acid into 0.5-5% chitosan solution, after the belt dissolves completely, put a certain amount of titanium Acetate methyl ester (the amount is 30% of chitosan mass) is added, stirs rapidly, after the reaction is complete, it becomes a gel, and the gel is freeze-dried to obtain nano-TiO 2 Mesoporous Chitosan Particles for Catalytic Particles, TiO 2 The particle size is 10-50nm.

[0027] Sample 2: Dissolve chitosan (deacetylation degree is above 80%, molecular weight is 5000-200,000) with 2% acetic acid into 0.5-5% chitosan solution, after the belt dissolves completely, add a certain amount of silicon Acetate methyl ester, (consumption is 30% of chitosan quality) adds, stirs rapidly, becomes gel after treating that reaction is complete, and gel is carried out fre...

Embodiment 2

[0029] Embodiment 2 formaldehyde adsorption experiment

[0030] Refer to "Diatomite-based Nano-TiO 2 Experimental Research on Formaldehyde Degradation" (Yu Chenglin, Quan Hongen, Kang Yong. [J]. Journal of Environmental Science, 2012, 32(1): 116-122), at room temperature, press 50g / m 2 The amount of the sample evenly distributed on the glass surface, under natural light, to measure the concentration of different formaldehyde (2mg / m 3 、6mg / m 3 , 10mg / m 3 ) The scavenging effect of the mesoporous chitosan particles containing nano catalytic particles of the present invention on formaldehyde gas. The results are shown in Table 1-3.

[0031] Table 1

[0032]

[0033] Table 2

[0034]

[0035] table 3

[0036]

[0037] The results show that the mesoporous chitosan particles containing nano catalytic particles of the present invention have a good scavenging effect on formaldehyde gas, wherein, 2mg / m 3 About 90% of formaldehyde, 10mg / m 3 Under ultra-high concentrati...

Embodiment 3

[0039] Using the method of dynamic gas distribution, the concentration of H 2 The mixture of S and nitrogen, and a small amount of air are mixed evenly in the mixer, and then enter the closed adsorption box bed unit at a flow rate of 0.3L / min, and the air is filled with CaCl before entering the mixer. 2 Dry the tubes to remove moisture from the air. At room temperature, according to 50g / m 2 The amount of the sample is evenly distributed on the glass surface, under natural light, measure the mesoporous chitosan particles containing nano catalytic particles of the present invention to 100mg / m 3 The scavenging effect of hydrogen sulfide gas under the concentration. The results are shown in Table 4. The results show that the mesoporous chitosan particles containing nano catalytic particles of the present invention have a good scavenging effect on hydrogen sulfide gas, and can reduce the concentration of hydrogen sulfide by more than 50% within 10 minutes. More than 99% clearan...

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
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses catalytic nanoparticle-containing microporous chitosan particles. The catalytic nanoparticle-containing microporous chitosan particles are prepared by dissolving chitosan by using organic weak acid with the concentration of 2%, then adding a certain amount of titanate and / or silicate, reacting to form a gel, and performing freeze drying. The catalytic nanoparticle-containing microporous chitosan particles are prepared by compounding nanometer TiO2 and / or SiO2 with microporous chitosan particles; moreover, the catalytic nanoparticle-containing microporous chitosan particles can adsorb and chemically absorb foreign matters in air, and the foreign matter removing ability thereof can be significantly improved.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a mesoporous chitosan particle containing nanometer catalytic particles and an application thereof. Background technique [0002] Submarines and saturated diving chambers are airtight workplaces that operate underwater and under high pressure for a long time, and have military and non-military uses such as deep-sea exploration. The space in the cabin is narrow, the equipment is densely distributed, and the crew lives and works in a closed environment for a long time. Therefore, the air quality and comfort issues in the submarine cabin have always been concerned by domestic and foreign researchers. At the beginning of the 20th century, developed countries represented by the United States began to study the habitability of submarine confined spaces. After nearly half a century of research, my country has also made important progress. The atmospheric co...

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): B01J20/24B01J20/28B01J31/06B01J31/38B01J35/02B01D53/86B01D53/52B01D53/72
CPCB01D53/8612B01D53/8668B01J20/06B01J20/103B01J20/24B01J20/28016B01J31/06B01J31/38B01D2257/70B01D2258/06B01J35/50
Inventor 汤晓璇杨宇民赵亚红凌珏张鲁中李贵才
Owner NANTONG UNIVERSITY