MIPs logo MIPdatabase     MIP2018 Conference website
Custom Search
Reference type: Journal
Authors: Gao BJ, Zhang YQ, Xu Y
Article Title: Study on recognition and separation of rare earth ions at picometre scale by using efficient ion-surface imprinted polymer materials.
Publication date: 2014
Journal: Hydrometallurgy
Volume: 150
Page numbers: 83-91.
DOI: 10.1016/j.hydromet.2014.09.017
Alternative URL: http://www.sciencedirect.com/science/article/pii/S0304386X14002138

Abstract: The graft-polymerization of hydroxyethyl methylacrylate (HEMA) on micro-sized silica gel particles was first conducted by initiating of a surface-initiating system, which was constituted by the bonded amino groups on the modified silica gel particles and persulfate in the solution, obtaining the grafted particles PHEMA/SiO2 with a high grafting degree of 40 g/100 g. Subsequently, 8-hydroxyquinoline as a ligand with strong chelating ability for metal ions was bonded on the side chains of the grafted macromolecule PHEMA through the substitution reaction between 5-chloromethyl-8-hydroxyquinoline (CHQ) and the hydroxyl group of the grafted macromolecule PHEMA, preparing the functional grafted particles HQ-PHEMA/SiO2. On the basis of examining the chelating adsorption property of HQ-PHEMA/SiO2 particles for Pr3 + ion, the Pr3 + ion surface-imprinting was carried out by using the effective surface-imprinting technique of "pre-grafting and post-crosslinking/imprinting" established by our group. During the surface-imprinting process, Pr3 + ion was used as a template ion, and 2,2'-dichlorodiethyl ether was used crosslinked, resulting in the Pr3 + ion surface-imprinted material IIP-HQP/SiO2. The recognition and binding characters of IIP-HQP/SiO2 towards Pr3 + ion were investigated in-depth with La3 + and Ce3 + ions as two contrast ions. The experimental results show that the IIP-HQP/SiO2 particles possess special recognition selectivity and high binding ability for Pr3 + ion. The binding capacity of IIP-HQP/SiO2 for Pr3 + ion reaches 0.13 mmol/g, and relative to La3 + and Ce3 + ions, the selectivity coefficients of IIP-HQP/SiO2 for Pr3 + ion are 5.22 and 5.12, respectively. La, Ce and Pr are three neighbouring rare earth elements, and the ion radius differences between La3 +, Ce3 + and Pr3 + ions are only in a range of 2-5 pm. Obviously, in this investigation, the mutual separation of La3 +, Ce3 + and Pr3 + ions at picometre scale is realized successfully by using the ion surface-imprinted polymer material with high performance
Template and target information: rare earth metals, Pr(III), praseodymium ion
Author keywords: Ion surface imprinting technique, rare earth ion, ion recognition, separation


  Periodic table Nerd shirt  Cryptic logo shirt  Woman of proper-tea mug in red

Molecules Special Issue call     Sensors Special Issue call






Join the Society for Molecular Imprinting
Logo of the Society for Molecular Imprinting

New items RSS feed
new items RSS feed  View latest updates

Sign-up for e-mail updates:
Choose between receiving an occasional newsletter or more frequent e-mail alerts.
Click here to go to the sign-up page.


Is your name elemental or peptidic? Enter your name and find out by clicking either of the buttons below!
Other products you may like:
view listings for MIP books on eBay:
US listings   UK listings

Searching for Molecular Imprinting books on Amazon.com:
Molecular Imprinting
Imprinted Polymers
Polymer Chemistry
Organic Chemistry
Biosensors

Find what you need at Amazon.com

Lab supplies from Amazon