Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Comparative Study of the U(VI) Adsorption by Hybrid Silica-Hyperbranched Poly(ethylene imine) Nanoparticles and Xerogels

Michael Arkas
* ORCID logo ,
Konstantinos Giannakopoulos
,
Evangelos P. Favvas
ORCID logo ,
Sergios Papageorgiou
ORCID logo ,
George V. Theodorakopoulos
ORCID logo ,
Artemis Giannoulatou
,
Michail Vardavoulias
,
Dimitrios A Giannakoudakis
ORCID logo ,
Konstantinos S Triantafyllidis
ORCID logo ,
Efthalia Georgiou
,
Ioannis Pashalidis
* ORCID logo
Version 1 : Received: 28 April 2023 / Approved: 29 April 2023 / Online: 29 April 2023 (04:48:19 CEST)

A peer-reviewed article of this Preprint also exists.

Arkas, M.; Giannakopoulos, K.; Favvas, E.P.; Papageorgiou, S.; Theodorakopoulos, G.V.; Giannoulatou, A.; Vardavoulias, M.; Giannakoudakis, D.A.; Triantafyllidis, K.S.; Georgiou, E.; Pashalidis, I. Comparative Study of the U(VI) Adsorption by Hybrid Silica-Hyperbranched Poly(ethylene imine) Nanoparticles and Xerogels. Nanomaterials 2023, 13, 1794. Arkas, M.; Giannakopoulos, K.; Favvas, E.P.; Papageorgiou, S.; Theodorakopoulos, G.V.; Giannoulatou, A.; Vardavoulias, M.; Giannakoudakis, D.A.; Triantafyllidis, K.S.; Georgiou, E.; Pashalidis, I. Comparative Study of the U(VI) Adsorption by Hybrid Silica-Hyperbranched Poly(ethylene imine) Nanoparticles and Xerogels. Nanomaterials 2023, 13, 1794.

Abstract

Two different silica conformations (Xerogels and Nanoparticles) both formed by the mediation of dendritic poly (ethylene imine) were tested at low pHs on the problematic uranyl cation sorption. The effect of crucial factors i.e., temperature, electrostatic forces, adsorbent composition, accessibility of the pollutant to the dendritic cavities and MW of the organic matrix was investigated to conclude the optimum formulation for water purification under these conditions. This was attained with the aid of UV-Visible and FTIR spectroscopy, dynamic light scattering (DLS), ζ-potential; Brunauer–Emmett–Teller (BET) porosimetry, Thermo Gravimetric Analysis (TG) and Scanning Electron Microscopy (SEM) Results highlighted that both adsorbents have extraordinary sorp-tion capacity. Xerogels are cost-effective since they approximate the performance of na-noparticles with much lesser organic content. Furthermore, they are more practicable materials since they may penetrate the pores of a metal or ceramic solid substrate in the form of a precursor, gel-forming solution.

Keywords

Uranyl Cations; Dendritic Polymers; Silica Xerogels; Composites; Nanoparticles; water purification; radioactive wastewater; Uranium removal; Dendrimers; Biomimetic

Subject

Chemistry and Materials Science, Nanotechnology

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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