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Light-control type-ionic imprinting adsorbent, preparation method and regeneration method

An ion imprinting and adsorbent technology, applied in the fields of light-controlled-ion imprinting adsorbent and preparation and regeneration, can solve problems such as increasing application cost, and achieve the effects of improving adsorption efficiency, protecting the environment and saving costs

Active Publication Date: 2018-02-16
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the current regeneration methods of ion imprinted polymers mainly include acid washing (HCl or HNO 3 ) and EDTA solution washing, these regeneration methods all need to use chemical reagents, on the one hand, a certain amount of elution wastewater will be produced, on the other hand, the application cost will also be increased

Method used

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Examples

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Effect test

preparation example Construction

[0032] The present application prefers a method for preparing carbon nitride. After mixing melamine and silicon dioxide, calcining at 550±10° C., and then soaking in ammonium bifluoride solution. Further preferably, the melamine and SiO 2 According to the mass ratio of 1:1. Further preferably, the heating rate of the calcination is 10° C. / min. Calcination time is 3h. The soaking time in the ammonium bifluoride solution is 1 to 3 days. Further preferably, filter after soaking, wash with water until neutral, and then dry.

[0033] Another embodiment of the present application provides a light-controlled ion imprinting adsorbent prepared by the above preparation method.

[0034] The third embodiment of the present application provides a method for extracting lithium by using the above-mentioned light-controlled-ion-imprinted adsorbent, which uses visible light to irradiate the aqueous solution containing the above-mentioned light-controlled-ion-imprinted adsorbent and lithium...

Embodiment 1

[0038] Preparation of Carbon Nitride

[0039] Melamine and nano-SiO 2 Mix evenly at a mass ratio of 1:1, put into a quartz boat, and place it in a tube furnace. In the air, raise the temperature to 550°C at a rate of 10°C / min, keep it for 3 hours, and cool down naturally. The obtained solid is taken out, soaked in ammonium bifluoride solution for 1-3 days, filtered, washed with water until neutral, and dried to obtain carbon nitride. The prepared carbon nitride is a mesoporous material with a specific surface area of ​​80-300m 2 / g, the pore size is 10-45nm.

[0040] Preparation of Light Controlled-Ion Imprinted Polymer

[0041] Add 0.3g of dibenzo-14-crown 4, 0.286g of 2,5-dicarboxy-4-hydroxyazobenzene and 0.069g of lithium nitrate into 60mL of a mixed solution of methanol and dimethyl sulfoxide (methanol and dimethyl sulfoxide The specific volume ratio of sulfone is 4:1), and then placed for 12h to obtain the raw material solution.

[0042] Take by weighing 0.5g carbon...

Embodiment 2

[0049] This example is the same as Example 1, except that spiropyran is used instead of 2,5-dicarboxy-4-hydroxyazobenzene.

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Abstract

The invention discloses a light-control type-ionic imprinting adsorbent, a preparation method and a regeneration method. The preparation method comprises the following steps: uniformly mixing a macrocyclic compound, a photosensitive monomer and lithium salt to prepare a raw material solution, adding a carrier, a crosslinking agent and an initiator into the raw material solution for reaction underan inert gas condition to obtain a template ion-containing imprinting polymer, putting the template ion-containing imprinting polymer into water, and desorbing template ions under an ultraviolet irradiation condition, thereby obtaining the light-control type-ionic imprinting adsorbent, wherein the macrocyclic compound is calixarene, cyclodextrin, crown ether or cucurbituril, and the photosensitivemonomer is spiropyrane, an azobenzene derivative, diarylethene or fulgide.

Description

technical field [0001] The invention relates to a light-controlled ion imprinting adsorbent, a preparation method and a regeneration method. Background technique [0002] In recent years, the rapid growth of population and the rapid development of economy have caused a series of problems that need to be solved, such as the shortage of resources, the pollution of water bodies and the atmospheric environment, especially the smog problem that is currently concerned by the world. One of its main sources of pollution is The emission of automobile exhaust is, in the final analysis, the air pollution caused by the combustion of fuel. Lithium has strong electrochemical activity, and the lithium battery made has the advantages of high open circuit voltage, high specific energy, wide operating temperature range, balanced discharge, and self-discharged electrons. In view of this, people have designed and manufactured lithium battery electric vehicles to replace traditional vehicles to...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30B01J20/34C02F1/28C02F1/30
Inventor 王睿黄岩
Owner SHANDONG UNIV
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