Chitosan/kit-6 type silicon-based composite material and its preparation method and application

A silicon-based composite material, KIT-6 technology, applied in chemical instruments and methods, other chemical processes, adsorbed water/sewage treatment, etc., can solve the problems of low ion exchange capacity, limited progress, low heavy metal ion adsorption performance, etc. To achieve the effect of shortening synthesis time, simple method and simple operation

Active Publication Date: 2021-06-18
LIAONING UNIVERSITY
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the fact that the pure silica material itself does not have active groups, KIT-6 has low selective adsorption performance for heavy metal ions and low ion exchange capacity, these defects largely limit its progress in actual production and application.

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
  • Chitosan/kit-6 type silicon-based composite material and its preparation method and application
  • Chitosan/kit-6 type silicon-based composite material and its preparation method and application
  • Chitosan/kit-6 type silicon-based composite material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1 Chitosan / KIT-6 type silicon-based composite material PEI-CS-KIT-6

[0033] The synthetic route of chitosan / KIT-6 silicon-based composite material PEI-CS-KIT-6 is as follows:

[0034]

[0035] (1) Preparation method

[0036] 1) Put 4g of P123 into an Erlenmeyer flask, add 120g of water, add 20mL of concentrated hydrochloric acid, stir in a water bath at 35°C overnight, then add 4g of n-butanol drop by drop, react for 1 hour, then add 8.6g of TEOS, and react 2h, the resulting reaction solution is KIT-6 solution.

[0037] 2) Dissolve 2g CS in 50mL acetic acid, stir and dissolve to obtain a chitosan (CS) solution. Pour the KIT-6 solution obtained in step 1) into the chitosan (CS) solution, then add 15 mL of glutaraldehyde dropwise, continue the reaction at 35° C. for 22 hours, then transfer to an autoclave, and conduct a hydrothermal reaction at 100° C. for 20 hours. Suction filtration, wash with alcohol first, then wash with water until neutral, and dry ...

Embodiment 2

[0044] Embodiment 2 chitosan / KIT-6 type silicon-based composite material PEI-CS-KIT-6 is to the adsorption of Cr (VI)

[0045] Method: take the solution containing hexavalent chromium, adjust the pH to 1-8, add the chitosan / KIT-6 type silicon-based composite material PEI-CS-KIT prepared in Example 1 according to the ratio of solid-liquid ratio 1mg:1ml -6, adsorption at 303K for 24 hours by shaking.

[0046] (1) Adsorption effect on Cr(VI) under different acidity

[0047] Method: Take the hexavalent chromium solution with a pH of 1, 2, 4, 6, and 8 and a concentration of 20ppm respectively, add the PEI-CS-KIT-6 prepared in Example 1 at a solid-to-liquid ratio of 1mg:1ml, and add it at 303K Shock adsorption for 24h. The adsorption rate was measured, and the results were as follows Figure 5 As shown, at pH 1-4, -NH 2 is protonated, while Cr(VI) is mainly HCrO 4 - with Cr 2 o 7 2- The existence of the form makes Cr(VI) easy to be adsorbed, and the adsorption rate can reac...

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 chitosan / KIT‑6 type silicon-based composite material and a preparation method and application thereof. The technical scheme adopted is: first dissolve an appropriate amount of P123 in water, and add concentrated hydrochloric acid, stir in a water bath overnight, then add n-butanol and stir, then add tetraethyl orthosilicate, after the reaction, pour the solution into the chitosan solution Add glutaraldehyde dropwise, continue to react for a period of time, transfer to an autoclave for hydrothermal reaction for a certain period of time, cool, filter with suction, wash until neutral, dry overnight, and perform Soxhlet extraction with acetone to obtain CS‑KIT‑ 6. Dissolve CS‑KIT‑6 in dimethyl sulfoxide, add appropriate amount of epichlorohydrin, microwave reaction, wash until neutral, dry overnight, then add a certain amount of polyethyleneimine solution and N,N‑ Dimethylformamide was subjected to microwave reaction, washed to neutrality, and dried overnight to obtain the product PEI‑CS‑KIT‑6. The composite material prepared by the invention can be used as an adsorbent for the adsorption of chromium in the water body, and has the characteristics of energy saving, environmental protection, high efficiency and the like.

Description

technical field [0001] The invention belongs to the field of preparation of composite materials and adsorption of heavy metals, and in particular relates to a method for effectively adsorbing hexavalent chromium from a solution containing hexavalent chromium by a chitosan / KIT-6 type silicon-based composite material. Background technique [0002] Chromium and its compounds are widely used in industry. A series of industries such as chemical industry, metallurgy, mineral engineering, chromium production, electroplating, pharmaceuticals, light industry and textile will produce a large amount of chromium-containing wastewater. Hexavalent chromium is an important pollutant in water bodies and has persistent hazards to the environment. Hexavalent chromium is easily absorbed by the human body, and it can invade the human body through the digestive tract, respiratory tract, skin and mucous membranes. When it invades through the digestive tract, it can cause vomiting and abdominal pa...

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 Patents(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F101/22
CPCB01J20/103B01J20/24C02F1/28C02F2101/22
Inventor 孙思瑶单炜军张鹏王丹丹熊英娄振宁
Owner LIAONING UNIVERSITY
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