Titanium Alkylphosphate Functionalised Mesoporous Silica for Enhanced Uptake of Rare-Earth Ions

Show full item record



Permalink

http://hdl.handle.net/10138/298138

Citation

Zhang , W , Avdibegovic , D , Koivula , R , Hatanpää , T , Hietala , S , Regadio , M , Binnemans , K & Harjula , R 2017 , ' Titanium Alkylphosphate Functionalised Mesoporous Silica for Enhanced Uptake of Rare-Earth Ions ' , Journal of Materials Chemistry. A , vol. 5 , no. 45 , pp. 23805-23814 . https://doi.org/10.1039/c7ta08127h

Title: Titanium Alkylphosphate Functionalised Mesoporous Silica for Enhanced Uptake of Rare-Earth Ions
Author: Zhang, Wenzhong; Avdibegovic, Dzenita; Koivula, Risto; Hatanpää, Timo; Hietala, Sami; Regadio, Mercedes; Binnemans, Koen; Harjula, Risto
Contributor organization: Department of Chemistry
Ion exchange for nuclear waste treatment and for recycling
Polymers
Date: 2017-12-07
Language: eng
Number of pages: 10
Belongs to series: Journal of Materials Chemistry. A
ISSN: 2050-7488
DOI: https://doi.org/10.1039/c7ta08127h
URI: http://hdl.handle.net/10138/298138
Abstract: The separation of rare-earth elements (REEs) is usually carried out by a multi-stage solvent extraction process utilising organophosphorus extractants. Inspired by the structure of the solvating extractant tri-n-butyl phosphate (TBP), new sorbents were designed by covalently attaching short n-alkyl chains (ethyl, n-propyl and n-butyl) to titanium(IV) phosphate functionalised mesoporous MCM-41 silica by a layer-by-layer grafting route. Mesoporous MCM-41 silica served as a versatile porous support and the grafted titanium(IV) derivatives provided enhanced acid stability and solvating extraction capability. Various characterisation methods including solid-state C-13, Si-29 and P-31 magic-angle spinning (MAS) nuclear magnetic resonance (NMR) and simultaneous thermogravimetry and differential scanning calorimetry-mass spectroscopy (TG/DSC-MS) were used to confirm the ligand attachment. The hybrid materials showed a better uptake of rare-earth ions from nitrate feed solution than the unmodified inorganic material. The optimal separation factor (SF) obtained for scandium-lanthanum separation is in excess of 100 000 at pH 2.1. The SFs calculated for dysprosium-neodymium are approximately 3, which is comparable to that of TBP in a typical solvent extraction setup. This study provides a new strategy to design inorganic-organic hybrid sorbents based on the structure of organophosphorus extractants via metal(IV)-O-P bonds.
Description: The research leading to these results has received funding from the European Community's Horizon 2020 Programme under Grant Agreement no. 636876 (MSCA-ETN REDMUD).
Subject: TRIBUTYL-PHOSPHATE
SELECTIVE RECOVERY
HIGHLY EFFICIENT
REGENERABLE SORBENTS
ACTINIDE EXTRACTION
HYBRID MATERIALS
BUTYL PHOSPHATE
LANTHANIDE
URANIUM
MCM-41
116 Chemical sciences
114 Physical sciences
Peer reviewed: Yes
Rights: unspecified
Usage restriction: openAccess
Self-archived version: acceptedVersion
Funder: European Commission / Horizon 2020
Grant number:


Files in this item

Total number of downloads: Loading...

Files Size Format View
Manuscript_Revised_Just_accepted_PDF.pdf 1.399Mb PDF View/Open

This item appears in the following Collection(s)

Show full item record