Journal
CATALYSIS TODAY
Volume 284, Issue -, Pages 146-152Publisher
ELSEVIER
DOI: 10.1016/j.cattod.2016.11.010
Keywords
Co-doping; Ion-exchange; Manganese; Gadolinium; Zero-field splitting; ESR
Funding
- Swiss National Science Foundation [200021_144419, 670918]
- Swiss National Science Foundation (SNF) [200021_144419] Funding Source: Swiss National Science Foundation (SNF)
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Homogeneous Mn2+ and Gd3+ intercalation of scroll-type trititanate nanotubes using a post-synthesis ion exchange method is reported. Compared to Mn2+, Gd3+ ion-exchange shows larger saturation intercalation levels. Upon co-doping, weak interactions between the dopant ions were found to modify the incorporated concentrations. Electron spin resonance (ESR) measurements, performed at several frequencies, confirmed the homogeneous distribution of Mn2+ and Gd3+. Detailed simulation of ESR spectra identified a large spread of the local structural distortions of the occupied sites as a result of a wide range of curvature radii of the titanate nanotubes. (C) 2016 Elsevier B.V. All rights reserved.
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