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Amino-functional ordered mesoporous carbon material and preparation method and application thereof

A technology of amino-functionalization and mesoporous carbon, which is applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc. It can solve problems such as complex process, strong irritation, and unfavorable mass production. Achieve the effects of simple operation, increased concentration and low cost

Inactive Publication Date: 2014-02-26
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This treatment method is not only a complicated process, but also uses a highly irritating and environmentally polluting reagent such as thionyl chloride, which is not conducive to industrial mass production
In the prior art, there is no report on the preparation of amino-functionalized ordered mesoporous carbon materials by directly grafting amino groups to the ordered mesoporous carbon after nitric acid oxidation

Method used

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  • Amino-functional ordered mesoporous carbon material and preparation method and application thereof
  • Amino-functional ordered mesoporous carbon material and preparation method and application thereof
  • Amino-functional ordered mesoporous carbon material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Step 1: Melt 6.1g of phenol at 40-45°C. After the phenol is completely melted, slowly add 1.3g of 20wt% sodium hydroxide solution, stir evenly, add 9.68g of 37wt% formaldehyde solution, and put the mixed system in a water bath at 75°C. After stirring and reacting for 1 h, it was cooled to room temperature, and the pH was adjusted to neutral with dilute hydrochloric acid solution. Then it was dried under vacuum overnight to obtain phenolic prepolymer (PF), and then the PF prepolymer was dissolved in ethanol solution to form a phenolic ethanol solution with a mass fraction of 20%. Weigh 1g of F127 and dissolve it in 10g of absolute ethanol, add 1g of 0.2mol / L hydrochloric acid solution, and stir at 40°C to obtain a clear solution. Then gradually add 2.08g of tetraethyl orthosilicate and 5g of 20wt% phenolic resin ethanol solution dropwise, and stir magnetically for 2 hours to obtain a transparent and homogeneous solution. Then it was transferred to an evaporating dish, v...

Embodiment 2

[0032] The first step: with embodiment 1.

[0033] Step 2: put ordered mesoporous carbon into 2mol / L nitric acid solution for oxidation, the molar ratio of ordered mesoporous carbon to nitric acid is 1:14, stir at 50-60°C for 2 hours, filter the product, Wash and dry in a vacuum oven at 45-55°C. Disperse the dried product in anhydrous toluene, add organosilane coupling agent (3-aminopropyl) trimethoxysilane (APTS), the molar ratio of APTS to ordered mesoporous carbon is 1, and the Reflux at °C for 24 hours, filter the product with suction, wash, and dry in a vacuum oven at 45-55°C. The dried product was protonated with 0.2 mol / L hydrochloric acid solution, stirred at room temperature for 6 hours, filtered, and dried in a vacuum oven at 45-55°C to obtain amino-functionalized ordered mesoporous carbon.

Embodiment 3

[0035] The first step: with embodiment 1.

[0036] Step 2: put ordered mesoporous carbon into 6mol / L nitric acid solution for oxidation, the molar ratio of ordered mesoporous carbon to nitric acid is 1:14, stir at 50-60°C for 2 hours, filter the product, Wash and dry in a vacuum oven at 45-55°C. Disperse the dried product in anhydrous toluene, add organosilane coupling agent (3-aminopropyl) trimethoxysilane (APTS), the molar ratio of APTS to ordered mesoporous carbon is 1, and the Reflux at °C for 24 hours, filter the product with suction, wash, and dry in a vacuum oven at 45-55°C. The dried product was protonated with 0.2 mol / L hydrochloric acid solution, stirred at room temperature for 6 hours, filtered, and dried in a vacuum oven at 45-55°C to obtain amino-functionalized ordered mesoporous carbon.

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Abstract

The invention discloses an amino-functional ordered mesoporous carbon material and a preparation method and application thereof. The preparation method comprises the steps of carrying out concentrated nitric acid oxidation treatment on the ordered mesoporous carbon synthesized by soft template lines, and preparing the amino-functional ordered mesoporous carbon material under the action of a silane coupling agent. Through wet oxidation on the ordered mesoporous carbon, the concentration of hydroxyl groups in an ordered mesoporous carbon duct is remarkably improved. Through the organic silane coupling agent, silane groups containing amino can be uniformly grafted into the duct of ordered mesoporous carbon with ordered height and uniform pore size distribution. The technical problem that functional groups cannot be grafted directly caused by hydrophobicity and surface inertness of the ordered mesoporous carbon material is solved. Applied to Cr (VI) in an adsorption aqueous solution, the material has the advantages of being convenient to apply, and high in adsorption rate and adsorption volume.

Description

technical field [0001] The invention relates to the technical field of a functional material and its preparation method and application, in particular to an amino-functionalized ordered mesoporous carbon material and its preparation method and application. Background technique [0002] With the development of society, especially the development of industry, heavy metal pollution has become an increasingly serious environmental problem, and chromium pollution is a major focus and difficulty. The main sources of chromium-containing wastewater are mining, chemical, electroplating, leather and other industrial wastewater and landfill leachate. Chromium has two relatively stable valence states of Cr(VI) and Cr(III) in nature. The toxicity of chromium compounds in different valence states is different. The toxicity of Cr(VI) is the most toxic, and its toxicity is that of Cr(III). 100 times. Cr(VI) in wastewater is mainly CrO 4 2- and Cr 2 o 7 2- It exists in the form of phy...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F1/62
Inventor 李健生王连军朱雯齐俊文陆锐沈锦优孙秀云韩卫清刘晓东
Owner NANJING UNIV OF SCI & TECH
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