Conference proceeding
Lepidocrocite TiO2 nanofilaments: optical properties revealed by ultrafast transient absorption
Proceedings Volume 12884, Ultrafast Phenomena and Nanophotonics XXVIII, v 12884, pp 1288409-1288409-3
08 Mar 2024
Abstract
Use of nanomaterials for photocatalysis faces challenges such as complex synthesis, high cost, low scalability, and dependance on UV radiation for initiating the photocatalytic activity. We recently demonstrated scalable, one-pot syntheses of one-dimensional (1D) lepidocrocite-based nanofilaments (NFs), 1DL NFs, that have the potential to overcome some of the challenges. 1DL NFs are exceptionally stable in water, have a large surface to volume ratio, and sub-square-nanometer cross sections. Initial reports show the semiconducting nature of this material, with an indirect band gap energy of 4.0 eV, one of the highest ever reported for a titania material. In this work, we present a study of the electronic and optical properties of these newly discovered 1DL NFs using ultrafast transient optical absorption. We show that despite the large band gap of this material, sub-gap states can be accessed with visible light illumination only, and photoexcited species reveal decay times in the nanosecond scale. Long lived photoexcitations in the visible range, without assistance by UV illumination, pave the way for possible application in photocatalysis.
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Details
- Title
- Lepidocrocite TiO2 nanofilaments: optical properties revealed by ultrafast transient absorption
- Creators
- Erika Colin-Ulloa - Worcester Polytechnic InstituteJulia L. Martin - Worcester Polytechnic InstituteRyan J. Hanna - Worcester Polytechnic InstituteMichelle H. Frasch - Worcester Polytechnic InstituteRebecca R. Ramthun - Worcester Polytechnic InstituteHussein O. Badr - Drexel UniversityJoshua R. Uzarski - United States Army Combat Capabilities Development CommandMichel W. Barsoum - Drexel UniversityRonald L. Grimm - Worcester Polytechnic InstituteLyubov V. Titova - Worcester Polytechnic Institute
- Contributors
- Markus Betz (Editor) - Technische Univ. Dortmund (Germany)Abdulhakem Y. Elezzabi (Editor) - University of Alberta
- Publication Details
- Proceedings Volume 12884, Ultrafast Phenomena and Nanophotonics XXVIII, v 12884, pp 1288409-1288409-3
- Publisher
- SPIE
- Resource Type
- Conference proceeding
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:001208321600008
- Scopus ID
- 2-s2.0-85191491925
- Other Identifier
- 991021866436404721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Nanoscience & Nanotechnology
- Optics