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Preparation and application of covalent organic framework porous nano composite material

A technology of covalent organic framework and nanocomposite material, applied in other chemical processes, chemical instruments and methods, water/sludge/sewage treatment, etc., to achieve the effect of cost saving, simple process and large adsorption capacity

Active Publication Date: 2020-11-03
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it has not been seen based on COFs load In 2 S 3 Nanoparticles for collaborative adsorption and removal of Hg 2+ report

Method used

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  • Preparation and application of covalent organic framework porous nano composite material
  • Preparation and application of covalent organic framework porous nano composite material
  • Preparation and application of covalent organic framework porous nano composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In 2 S 3 Nanoparticle-supported covalent organic framework composites (In 2 S 3 Preparation of @COF) nanocomposites

[0026] Preparation of covalent organic framework (COF-TpBD): Add 2,4,6-trialdehyde phloroglucinol (315.21 mg, 1.5 mmol), benzidine (414.54 mg, 2.25 mmol) to a 50 mL pyrex tube ), mesitylene (5 mL), 1,4-dioxane (5 mL) and aqueous acetic acid (1.5 mL, 6M), the mixture was sonicated (100% power) for 20 min by three freeze-pump-thaw cycles Degassed, sealed under vacuum, and heated at 120 °C for 3 days, after taking out, the reaction mixture was cooled to room temperature, and the yellow precipitate was collected by centrifugation, washed with ethanol, tetrahydrofuran, and N,N-dimethylformamide for several times, and then vacuum-dried at 60°C for 12 hours to obtain a covalent organic framework (COF-TpBD);

[0027] In 2 S 3 @covalent organic framework (In 2 S 3 @COF) preparation: COF-TpBD (200 mg) was dispersed in anhydrous n-hexane (40 mL) and sonica...

Embodiment 2

[0034] In 2 S 3 @COF Porous Nanocomposites for Hg in Water 2+ remove

[0035] (1) pH and In 2 S 3 Optimization of @COF usage

[0036] pH value of aqueous solution and In 2 S 3 The dosage of @COF porous nanocomposite was optimized. The results showed that in the range of pH3-8, In 2 S 3 @COF on Hg 2+ It has a high adsorption efficiency, which also shows that the porous material itself and loaded with nanoparticles have good stability. Therefore, the pH value of the aqueous solution was selected as the experimental reaction pH value of 7. When In 2 S 3 When the dosage of @COF increased from 1mg / 30mL to 5mg / 30mL, In 2 S 3 @COF on Hg 2+ The adsorption rate increases sharply, which is due to the increase in the surface area of ​​the material and the increase in the number of active adsorption sites on the nanoparticles. When In 2 S 3 When the dosage of @COF continued to increase from 5mg / 30mL to 8mg / 30mL, In 2 S 3 @COF on Hg 2+ The adsorption rate is almost unc...

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Abstract

The invention discloses preparation and application of a covalent organic framework porous nano composite material, and belongs to the technical field of environmental protection. Firstly, 2,4,6-trialdehyde phloroglucinol (Tp) and benzidine (BD) are subjected to a Schiff base reaction under proper conditions to prepare a covalent organic framework (COF-TpBD), then diindium trisulfide (In2S3) nanoparticles are loaded on the COF-TpBD in situ, and the composite material (In2S3@COF) with In2S3 and COF characteristics is obtained. The In2S3@COF prepared by the method is rich in a large amount of Selement and can adsorb Hg2+ through HgS interaction, and on the other hand, the inherent large specific surface area and excellent pore size of the COF can also greatly improve the adsorption capacityto Hg2+. Inductively coupled plasma mass spectrometry test results show that the In2S3@COF has excellent Hg2+ adsorption performance. The method is simple, stable in structure, low in cost, environmentally friendly and high in adsorption and removal efficiency of Hg 2+ in a water body, and can be used as an efficient adsorbent for Hg 2+ in environmental wastewater.

Description

technical field [0001] The invention relates to the preparation and application of a covalent organic framework porous nanocomposite material, belonging to the technical field of environmental protection. Background technique [0002] With the development of industry, the state of water cleanliness around the world is of increasing concern. Heavy metal ions are discharged into water bodies from various sources (including metal processing, fertilizers, electroplating, waste treatment, batteries, paint and fuel combustion, etc.), and these elements can be bioaccumulated along the food chain, which greatly threatens the environment and the safety of animals and plants . Hg 2+ It is the most common one, it can combine with protease and cause serious damage to human kidney (L.H.Zhi, Z.Wei, F.J.Chen, B.D.Wang. 3D MoS 2 Composition Aerogel as Chemosensors and Adsorbents for Colorimetric Detection and High-Capacity Adsorption of Hg 2+ , ACS Sustainable Chemistry & Engineering, 2...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/20
CPCB01J20/0248B01J20/0285B01J20/226C02F1/288C02F2101/20Y02W10/37
Inventor 邱建丁吴以迪梁汝萍
Owner NANCHANG UNIV
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