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Modifying method for activated carbon

An activated carbon and modification technology, applied in the field of activated carbon modification, can solve problems such as application limitation and limited number of active groups, and achieve the effects of simple operation, simple raw materials, and improved dispersibility.

Inactive Publication Date: 2013-05-15
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, due to the limitation of the surface structure of activated carbon, the number of active groups introduced by the above method is limited, so its application is also limited.

Method used

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  • Modifying method for activated carbon
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  • Modifying method for activated carbon

Examples

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Embodiment 1

[0045] A modification method of activated carbon, comprising the steps of:

[0046] (1) Mix the commercial activated carbon sample (5g) with 100mL ammonium persulfate 1M sulfuric acid solution with a concentration of 2 mol / L, stir at 60°C for 3 hours, separate by suction filtration, and fully wash with deionized water until neutral. ℃ in a vacuum drying oven overnight to obtain activated carbon (ACOFG) with oxygen-containing functional groups on the surface;

[0047] (2) The above activated carbon (2.46 g) with oxygen-containing functional groups on the surface was mixed with THF (50 mL), 4-dimethylaminopyridine (DMAP) (0.1467 g, 0.0012 mol) and triethylamine (TEA) (2.8 mL, 0.02 mol) into a 100mL round-bottomed flask, ultrasonicated for 30 minutes, transferred to an ice-water bath (-5~0 ℃), stirred under the protection of argon, and then dibromoisobutyryl bromide (BiBB) (2 g) tetrahydrofuran solution (13 mL) was added dropwise to the system, and the system was stirred in an ice...

Embodiment 2

[0058] A modification method of activated carbon, comprising 4 steps, wherein steps 1 to 2 are identical to those in Example 1, and the follow-up steps are as follows:

[0059] (3) AGET ATRP polymerization on the surface of activated carbon with tert-butyl acrylate (t-BA) as monomer: according to the ratio [t-BA] 0 / [CuBr 2 ] 0 / [PMDETA] 0 / [VC] 0 =689 / 2.3 / 2.3 / 0.1, add CuBr in turn 2 (0.0156 g, 0.069mmol), PMDETA (14.6 uL, 0.069mmol), t-BA (3 mL, 20.7mmol), AC-macroinitator (0.1 g), VC (0.0053 g, 0.03mmol), and anisole ( 1 mL). Put it into a 5 mL ampoule bottle, use the bubbling method to catch oxygen for ten minutes, and then seal the tube;

[0060] Place the sealed ampoule in an oil bath at a constant temperature (70°C) for a predetermined time to react for 2-10 h;

[0061] After the reaction, take out the sealed tube, immediately cool it with cold water, open the sealed tube, dilute with an appropriate amount of tetrahydrofuran, pour it into methanol for precipitation...

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Abstract

The invention discloses a modifying method for activated carbon. The modifying method comprises the following steps of: firstly, carrying out oxidation pretreatment on the activated carbon to obtain activated carbon containing an oxygen functional group on the surface; secondly, reacting the activated carbon containing an oxygen functional group on the surface with a compound A to obtain initiator-modified activated carbon; thirdly, configuring a polymer system and carrying out an ATRP (Atom Transfer Radical Polymerization) reaction at 50-90DEG C; and fourthly, separating and purifying to obtain the surface polymer-modified activated carbon. The invention discloses a novel modifying method. According to the novel modifying method, by introducing a polymer chain segment to the surface of the activated carbon in a covalent bond manner, using the performances of the polymer chain segment and combining the characteristics of great surface area, porous structure and the like of the activated carbon, the regulation and control for physical and chemical properties are realized and thereby the dispersibility of the activated carbon in an organic solvent or water is improved.

Description

technical field [0001] The invention relates to a method for modifying activated carbon. Background technique [0002] Activated carbon has important applications in many aspects due to its large specific surface area, porous structure, simple preparation and low cost. At present, activated carbon has been widely used as an adsorbent or a catalyst carrier, and has been widely used in the fields of environmental treatment, medicine and energy. [0003] However, some defects of activated carbon itself limit its application, such as poor dispersibility of activated carbon in organic solvents and water, narrow adjustment range of surface groups, and poor adsorption selectivity. [0004] In order to meet the application requirements of activated carbon in different fields, it is usually necessary to modify its surface to adjust the physical or chemical properties of activated carbon to meet the needs of use. At present, there are mainly the following methods for surface modific...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F292/00
Inventor 朱健刘亚晗朱秀林程振平张正彪
Owner SUZHOU UNIV
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