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Active/controllable graphene oxide surface ion imprinted polymer, and preparation method and application thereof

A graphene surface, ion imprinting technology, applied in chemical instruments and methods, other chemical processes, water/sewage treatment, etc., can solve the problem of slow adsorption rate, template molecules cannot be completely eluted, and the thickness of the surface polymer layer is uncontrollable, etc. problem, to achieve the effect of large adsorption capacity, good adsorption effect, and avoid incomplete elution

Inactive Publication Date: 2015-01-07
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The metal ion imprinted adsorbent obtained by other methods in the prior art has problems such as uncontrollable surface polymer layer thickness, template molecules cannot be completely eluted due to too deep embedding, and slow adsorption rate.

Method used

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  • Active/controllable graphene oxide surface ion imprinted polymer, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Place the beaker in an ice bath and add 23 mL of concentrated sulfuric acid (98% mass fraction). Then, under stirring condition, add 1 g of colloidal graphite powder and 0.5 g of sodium nitrate. Then, under vigorous stirring, 3 g of potassium permanganate was slowly added, and the reaction temperature was kept below 20 °C for 5 min. Then, the temperature was raised to 35 °C, and the reaction was continued for 30 min; after the reaction, 46 mL of deionized water was slowly added, and the temperature was raised to 98 °C, and the reaction was continued for 15 min; 140 mL of 60 °C deionized water and 7 mL of hydrogen peroxide (30% by mass) was added to the above mixed solution until the solution turned yellow-brown to end the reaction. Filter and wash with deionized water to pH = 7.0; finally, the obtained graphite oxide was dispersed in deionized water, ultrasonicated for 15 min, high-speed centrifuged, and vacuum-dried at 50 °C to obtain graphene oxide, namely GO.

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Embodiment 2

[0056] (1) Place the beaker in an ice-water bath, and add 46 mL of concentrated sulfuric acid (98% mass fraction). Then, under stirring condition, add 2 g of colloidal graphite powder and 1 g of sodium nitrate. Under strong stirring, 6 g of potassium permanganate was slowly added, and the reaction temperature was kept below 20 °C for 15 min; then, the temperature was raised to 35 °C and the reaction was continued for 45 min. After the reaction, 92 mL of deionized water was slowly added, and the temperature was raised to 98 °C, and the reaction was continued for 20 min; 280 mL of deionized water at 60 °C and 14 mL of hydrogen peroxide (mass fraction 30%) were added to the above mixed solution , until the solution turns yellowish-brown, the reaction is terminated; filter, and wash with deionized water to pH=7.0, the obtained graphite oxide is dispersed in deionized water, ultrasonicated for 15 min, high-speed centrifuged, and vacuum-dried at 50 °C to obtain graphene oxide , nam...

Embodiment 3

[0068] (1) Place the beaker in an ice-water bath, and add 92 mL of concentrated sulfuric acid (mass fraction 98%). Then, under stirring condition, add 4 g of colloidal graphite powder and 2 g of sodium nitrate. Under strong stirring, 12 g of potassium permanganate was slowly added, and the reaction temperature was kept below 20 °C for 30 min; the temperature was raised to 40 °C and the reaction was continued for 60 min. After the reaction, 184 mL of deionized water was slowly added, and the temperature was raised to 98 °C, and the reaction was continued for 20 min; 560 mL of deionized water at 60 °C and 28 mL of hydrogen peroxide (mass fraction 30%) were added to step (1) Mix the solution in until the solution turns yellow-brown, and the reaction is terminated. Filter and wash with deionized water to pH=7.0. Finally, the obtained graphite oxide was dispersed in deionized water and ultrasonicated for 15 min. After high-speed centrifugation and vacuum drying at 50 °C, graphen...

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Abstract

The invention provides an active / controllable graphene oxide surface ion imprinted polymer, and a preparation method and application thereof, belonging to the technical field of preparation and separation of materials, wherein the graphene oxide surface ion imprinted polymer is prepared from a coupling agent, a functional monomer, a cross-linking agent and an initiator by using graphene oxide as a substrate and metal ions as a template in a reversible addition-fragmentation chain transfer polymerization manner. The problems to be solved in the invention are as follows: the thickness of a surface polymer layer is uncontrollable; template molecules cannot be thoroughly eluted because of being embedded deeply; and the adsorption rate is low, etc; the graphene oxide surface ion imprinted polymer is mainly used for adsorbing corresponding metal ions in aqueous solution and has good absorption effect at room temperature and obvious selective separation effect; and the graphene oxide surface ion imprinted polymer can be reused frequently.

Description

technical field [0001] The invention belongs to the technical application field of environmental functional materials, in particular to an active / controllable graphene oxide surface ion imprinted polymer and its preparation method and application. Background technique [0002] The development and utilization of nuclear materials has led to the development of the world, but at the same time, the harm caused is also becoming more and more serious. The mining and processing of nuclear fuel, the leakage of nuclear reactors, and the reprocessing of nuclear fuel have become the main sources of radioactive elements in the environment. Europium, uranium, strontium, thorium, and cesium are all low-to-medium radioactive metal elements. When radioactive metal elements enter the environment, they will cause air, water and soil pollution. Among them, strontium, a low-radioactive element, is not easy to be excreted in the metabolic process, seriously endangering human health, and the so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F222/14C08F220/06C08F2/38C08F2/44C08J9/26B01J20/26B01J20/30C02F1/28C02F1/58
Inventor 刘燕孟祥国罗敏刘方方钟国星孟敏佳倪良
Owner JIANGSU UNIV
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