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

Method used

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Examples

Experimental program
Comparison scheme
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Example Embodiment

[0032] In this application, a method for preparing carbon nitride is preferred. After mixing melamine and silica, calcining at 550±10°C, and then immersing in ammonium bifluoride solution. Further preferably, the melamine and SiO 2 According to the mass ratio 1:1. More preferably, the heating rate of calcination is 10°C / min. The calcination time is 3h. The immersion time in ammonium bifluoride solution is 1 to 3 days. More preferably, after soaking, it is filtered, washed with water to neutrality, and then dried.

[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 light control type-ion imprinting adsorbent, which uses visible light to irradiate an aqueous solution containing the light control type-ion imprinting adsorbent and lithium ions.

[0035] The fourth embodiment of ...

Example Embodiment

[0037] Example 1

[0038] Preparation of carbon nitride

[0039] Combine melamine and nano-SiO 2 Mix evenly according to the mass ratio of 1:1, put it into the quartz boat, and place it in the tube furnace. In the air, the temperature rises to 550°C at a heating rate of 10°C / min, keeps it for 3h, and cools naturally. The solid obtained is taken out, soaked in ammonium bifluoride solution for 1-3 days, filtered, washed with water to neutrality, 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 dibenzo14 crown 4, 0.286g of 2,5-dicarboxy-4-hydroxyazobenzene and 0.069g of lithium nitrate to 60mL of a mixed solution of methanol and dimethylsulfoxide (methanol and dimethylsulfoxide) The specific volume ratio of sulfone is 4:1) dissolved in it, and then placed for 12 hours to obtain a raw materi...

Example Embodiment

[0048] Example 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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PUM

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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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