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Cerium ion imprinted magnetic nano material as well as preparation method and application thereof

A magnetic nanometer and cerium ion technology, applied in the field of detection, can solve the problems of complex synthesis method, poor material stability, cumbersome synthesis steps, etc., and achieve the effects of uniform distribution, difficult to embed, and strong anti-interference ability.

Active Publication Date: 2021-06-22
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the problems that the synthesis method of the existing surface ion-imprinted materials is relatively complex, the synthesis steps are relatively cumbersome, and the stability of the material is poor, the present invention provides a cerium ion-imprinted magnetic nanomaterial and its preparation method and application

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  • Cerium ion imprinted magnetic nano material as well as preparation method and application thereof
  • Cerium ion imprinted magnetic nano material as well as preparation method and application thereof
  • Cerium ion imprinted magnetic nano material as well as preparation method and application thereof

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preparation example Construction

[0037] Such as figure 1 Shown, the preparation method of a kind of cerium ion imprinted magnetic nano material of the present invention comprises the following steps:

[0038] S10, preparation of magnetic Fe 3 o 4 Nanoparticles

[0039] Preparation can be carried out using, for example, a solvothermal method. First weigh anhydrous sodium acetate (NaAc), add it to ethylene glycol (EG), ultrasonicate for 10-20 minutes until NaAc is completely dissolved and form a transparent solution, then add FeCl 3 ·6H 2 O, after ultrasonic treatment for 30-45min to obtain a homogeneous solution. where FeCl 3 ·6H 2 The concentration of O is 0.11~0.13M, NaAc and FeCl 3 ·6H 2 The molar ratio between O is 8:1~9:1;

[0040] Transfer the above homogeneous mixture solution into a polytetrafluoroethylene liner, seal it in a stainless steel autoclave, and heat it at 198-202°C for 7.5-8.5 hours. After naturally cooling to room temperature, the black product was separated with a strong neodym...

Embodiment 1

[0052] In this embodiment, GSS-3 (soil), GSD-10 (sediment), W-2a (diabase) three matrix standard materials and rainwater, river water, atmospheric particulate matter (PM 3.3-10 ), coal mines, iron ore and other actual samples as examples. After it was digested into a sample solution, the ion-imprinted magnetic solid-phase extraction was performed using Ce(III)-MIIP, a cerium ion-imprinted magnetic nanomaterial, to determine the concentration of Ce(III) in it. Specific steps include:

[0053] 1. Preparation of cerium ion imprinted magnetic nanomaterial Ce(III)-MIIP

[0054] (1) Weigh 3.6g NaAc, add it into 40mL EG, sonicate for 10min until NaAc is completely dissolved to form a transparent solution, then add 1.35g FeCl 3 ·6H 2 O, through ultrasonic treatment for 30min to obtain a homogeneous solution;

[0055]The above homogeneous mixture solution was transferred to a polytetrafluoroethylene liner, sealed in a stainless steel autoclave, and heated at 200°C for 8 hours. Aft...

Embodiment 2

[0073] Fe(III), Pb(II), Ca(II) and Ag(I) were used as interfering ions to investigate the selectivity of cerium ion-imprinted magnetic material Ce(III)-MIIP to Ce(III). During the experiment, Ce, Fe, Pb, Ca, Ag were simultaneously determined by ICP-MS. The measurement results are shown in Table 3.

[0074] From the partition coefficient data in Table 3, it can be seen that in the complex environment containing Fe(III), Pb(II), Ca(II) and Ag(I) competing ions, Ce(III)-MIIP has a positive effect on Ce(III ) has excellent selectivity and strong anti-interference ability, indicating that Ce(III)-MIIP has the ability to separate and enrich Ce(III) in heterogeneous matrix samples.

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Abstract

The invention discloses a cerium ion imprinted magnetic nano material as well as a preparation method and application thereof, and belongs to the technical field of detection. According to the preparation method, an organic-inorganic hybrid material HM is prepared on the surfaces of Fe3O4 nano particles, then nano Fe3O4 wrapping the hybrid material, namely Fe3O4-coated HM, is taken as a solid-phase carrier, a surface ion imprinting technology is combined, the cerium ion imprinted magnetic nano material Ce (III)-MIIP with good mechanical and chemical stability is prepared, the nano material has excellent selectivity on Ce (III), has strong anti-interference capability and can be used for specifically separating and enriching Ce (III).

Description

technical field [0001] The invention belongs to the technical field of detection, and more specifically relates to a cerium ion-imprinted magnetic nanomaterial and a preparation method and application thereof. Background technique [0002] Cerium (Ce), as a rare earth metal element with the highest abundance in nature, is widely used in military, electronics, metallurgy, ceramics, glass, petrochemical and other fields due to its unique properties. With the extensive use of cerium and its compounds, cerium directly exposed to the environment is also increasing, and then enters rivers, soil and air. Cerium in the environment not only affects the ecosystem, but also is difficult to excrete from the body through metabolism, and has accumulated toxicity; on the other hand, the existence and content of some characteristic trace rare earth elements in mineral products can reflect the origin and origin information of minerals , so it is of great significance to accurately determine...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30B01D15/08C02F1/28G01N27/62
CPCB01J20/06B01J20/22B01J20/261B01J20/28009B01D15/08C02F1/285C02F1/281G01N27/62B01J2220/4806B01J2220/4812
Inventor 练鸿振花玉张森李嘉元盛东陈逸珺
Owner NANJING UNIV
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