Tin Oxide Nanoparticles via Solar Vapor Deposition for Hexavalent Chromium Remediation - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue ACS Applied Nano Materials Année : 2023

Tin Oxide Nanoparticles via Solar Vapor Deposition for Hexavalent Chromium Remediation

Konstantinos Simeonidis
Kyriaki Kalaitzidou
  • Fonction : Auteur
Theopoula Asimakidou
  • Fonction : Auteur
Carlos Martinez-Boubeta
Antonios Makridis
Anita Haeussler
Georgios Vourlias
  • Fonction : Auteur
Lluis Balcells
  • Fonction : Auteur

Résumé

Tin oxide nanoparticles optimized to capture low concentrations of hexavalent chromium from water were developed through a facile, scalable, and low-cost one-step solar vapor deposition methodology. Considering the preservation of high electron donation capacity as the key to support the reduction of mobile Cr(VI) into insoluble forms, the growth of SnO nanoparticles was favored by the co-evaporation of SnO2 with Fe powders at various mass ratios. Characterization techniques indicated that the percentage and the stability of SnO is proportional to the Fe content in the target with a requirement of at least 50% wt to inhibit the formation of a passive SnO2 surface layer. The produced particles were evaluated regarding their efficiency to capture Cr(VI) under conditions similar to water treatment for drinking purposes (pH 7). It was revealed that passivation-free SnO nanoparticles deliver significant improvement in the adsorption capacity corresponding to the residual concentration of 25 μg/L, reaching a value of 1.74 mg/g for the sample prepared with 50% wt Fe in the target. The increase of water acidity was found responsible for the activation of more reduction sites on the particle surface, as reflected through the elevation of efficiency by more than 20% at pH 6.

Domaines

Chimie

Dates et versions

hal-04241261 , version 1 (13-10-2023)

Identifiants

Citer

Konstantinos Simeonidis, Kyriaki Kalaitzidou, Theopoula Asimakidou, Carlos Martinez-Boubeta, Antonios Makridis, et al.. Tin Oxide Nanoparticles via Solar Vapor Deposition for Hexavalent Chromium Remediation. ACS Applied Nano Materials, 2023, 6 (15), pp.13902-13911. ⟨10.1021/acsanm.3c01567⟩. ⟨hal-04241261⟩
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