RT Journal Article
T1 Bacterial-cellulose-derived carbonaceous electrode materials for water desalination via capacitive method: The crucial role of defect sites: 												The crucial role of defect sites
A1 Belaustegui, Yolanda
A1 Pantò, Fabiola
A1 Urbina, Leire
A1 Corcuera, Maria Angeles
A1 Eceiza, Arantxa
A1 Palella, Alessandra
A1 Triolo, Claudia
A1 Santangelo, Saveria
AB Electrosorptive desalination is a very simple and appealing approach to satisfy the increasing demand for drinking water. The large-scale application of this technology calls for the development of easy-to-produce, cheap and highly performing electrode materials and for the identification and tailoring of their most influential properties, as well. Here, biosynthesised bacterial cellulose is used as a carbon precursor for the production of three-dimensional nanostructures endowed with hierarchically porous architecture and different density and type of intrinsic and hetero-atom induced lattice defects. The produced materials exhibit unprecedented desalination capacities for carbon-based electrodes. At an initial concentration of 585 mg L−1 (10 mmol L−1), they are able to remove from 55 to 79 mg g−1 of salt; as the initial concentration rises to 11.7 g L−1 (200 mmol L−1), their salt adsorption capacity reaches values ranging between 1.03 and 1.35 g g−1. The results of the thorough material characterisation by complementary techniques evidence that the relative amount of oxygenated surface functional species enhancing the electrode wettability play a crucial role at lower NaCl concentrations, whereas the availability of active non-sp2 defect sites for adsorption is mainly influential at higher salt concentrations.
SN 0011-9164
YR 2020
FD 2020-10-15
LA eng
NO Belaustegui , Y , Pantò , F , Urbina , L , Corcuera , M A , Eceiza , A , Palella , A , Triolo , C & Santangelo , S 2020 , ' Bacterial-cellulose-derived carbonaceous electrode materials for water desalination via capacitive method: The crucial role of defect sites : The crucial role of defect sites ' , Desalination , vol. 492 , 114596 , pp. 114596 . https://doi.org/10.1016/j.desal.2020.114596
NO Publisher Copyright: © 2020 The Authors
DS TECNALIA Publications
RD 3 jul 2024