Highly efficient sequestration of aqueous lead on nanostructured calcite substrates

Following defocused ion beam sputtering, large area highly corrugated and faceted nanoripples are formed on calcite (10.4) faces in a self-organized fashion. High resolution AFM imaging reveals that calcite ripples are defined by facets with highly kinked (11.0) and (2.12) terminations. In situ AFM...

Full description

Saved in:
Bibliographic Details
Published in:Nanotechnology 2023-09, Vol.34 (36), p.365301
Main Authors: Barelli, Matteo, Casado, Santiago, Cassin, Felix, Pimentel, Carlos, Pina, Carlos M, Giordano, Maria Caterina, Buatier de Mongeot, Francesco, Gnecco, Enrico
Format: Article
Language:English
Subjects:
atomic force microscopy
ion beam sputtering
ion bombardment
metal sorption
nanopatterning
water purification
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Following defocused ion beam sputtering, large area highly corrugated and faceted nanoripples are formed on calcite (10.4) faces in a self-organized fashion. High resolution AFM imaging reveals that calcite ripples are defined by facets with highly kinked (11.0) and (2.12) terminations. In situ AFM imaging during the exposure of such modified calcite surfaces to PbCl2 aqueous solution reveals that the nanostructured calcite surface promotes the uptake of Pb. In addition, we observed the progressive smoothing of the highly reactive calcite facet terminations and the formation of Pb-bearing precipitates elongated in registry with the underlying nanopattern. By SEM-EDS analysis we quantified a remarkable 500% increase of the Pb uptake rate, up to 0.5 atomic weight % per hour, on the nanorippled calcite in comparison to its freshly cleaved (10.4) surfaces. These results suggest that nanostructurated calcite surfaces can be used for developing future systems for lead sequestration from polluted waters.
ISSN:0957-4484
1361-6528
DOI:10.1088/1361-6528/acdbd4