Journal article
Ion-Exchange Effects in One-Dimensional Lepidocrocite TiO2: A Cryogenic Scanning Transmission Electron Microscopy and Density Functional Theory Study
Chemistry of materials, v 36(6), pp 2743-2755
26 Mar 2024
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
One-dimensional lepidocrocite, 1DL, titania, TiO2, is a recently discovered form of this ubiquitous oxide that is of interest in a variety of applications ranging from photocatalysis to water purification, among others. The fundamental building blocks of these materials are snippets (30 nm long) of individual 1DLs that self-assemble into nanobundle, NB, structures. These NBs can then be driven to self-assemble into quasi-two-dimensional, 2D, sheets, films, or free-flowing mesoscopic particles. Here, we use analytical atomic-resolution scanning transmission electron microscopy (STEM) and first-principles density functional theory (DFT) calculations to demonstrate that the arrangement of the neighboring NFs can be altered through ion exchange with Li, Na, and tetramethylammonium hydroxide (TMA) cations. Moreover, using cryogenic electron energy-loss spectroscopy (EELS), we show that the introduction of different ion species results in a change in the local occupancy of the TiO2 t2g and eg orbitals. Both experimental findings are predicted by ground-state energy simulations of two-dimensional lepidocrocite TiO2.
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Details
- Title
- Ion-Exchange Effects in One-Dimensional Lepidocrocite TiO2: A Cryogenic Scanning Transmission Electron Microscopy and Density Functional Theory Study
- Creators
- Francisco Lagunas (Corresponding Author) - University of Illinois at ChicagoDavid Bugallo - Drexel UniversityFatemeh Karimi - University of Illinois at ChicagoYingjie Yang - University of Illinois at ChicagoHussein O. Badr - Drexel UniversityJacob H. Cope - Drexel UniversityEmilio Ferral - University of Illinois at ChicagoMichel W. Barsoum - Drexel UniversityYong-Jie Hu - Drexel UniversityRobert F. Klie (Corresponding Author) - University of Illinois at Chicago
- Publication Details
- Chemistry of materials, v 36(6), pp 2743-2755
- Publisher
- American Chemical Society
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:001180395400001
- Scopus ID
- 2-s2.0-85187024200
- Other Identifier
- 991021863995204721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Physical
- Materials Science, Multidisciplinary