ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

Post-Ammonia-Treated V2CTx MXene at Different Pressures: Effects on Morphology, Electronic, and Optical Properties

Pramanik, M and Limaye, MV and Pawar, MS and Late, DJ and Singh, SB (2022) Post-Ammonia-Treated V2CTx MXene at Different Pressures: Effects on Morphology, Electronic, and Optical Properties. In: Journal of Physical Chemistry C .

[img] PDF
jou_phy_che_2022.pdf - Published Version
Restricted to Registered users only

Download (9MB) | Request a copy
Official URL: https://doi.org/10.1021/acs.jpcc.2c08083


In the present work, vanadium carbide (V2CTx) MXene was synthesized successfully and then treated with an ammonia solution (NH4OH) under different pressures using a hydrothermal process. The sample morphology reveals that the V2CTx MXene gradually changed from uneven multilayered micrometre-size sheets to uniform few-layered nanometer-size sheets as the pressure increased. The optical emission spectra show broad emission and a blue shift due to nitrogen-related defects and quantum confinement. X-ray photoelectron spectroscopy shows the presence of nitrogen in all of the samples. The ultraviolet photoelectron spectroscopy study shows a modified density of states near the Fermi level and a maximum of ∼0.6 eV valence band edge shift towards a higher binding energy side after post-treatment with ammonia. More interestingly, the E1g Raman band becomes degenerate and the E1g band upshifts (∼15 cm-1) with increasing pressure treatment. The Raman results suggest that the induced lattice strain due to post-ammonia treatment plays a crucial role in deciding the optical and electronic properties. © 2023 American Chemical Society.

Item Type: Journal Article
Publication: Journal of Physical Chemistry C
Publisher: American Chemical Society
Additional Information: The copyright for this article belongs to American Chemical Society.
Keywords: Ammonium hydroxide; Binding energy; Blue shift; Carbides; Electronic properties; Emission spectroscopy; Morphology; Nitrogen; Optical lattices; Photoelectrons; Photons; Vanadium compounds; X ray photoelectron spectroscopy, Ammonia solution; Different pressures; Electronic and optical properties; Hydrothermal process; Micrometer sizes; Multi-layered; Nanometer size; Optical emission spectrum; Sample morphology; Synthesised, Ammonia
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 17 Mar 2023 09:58
Last Modified: 17 Mar 2023 09:58
URI: https://eprints.iisc.ac.in/id/eprint/81036

Actions (login required)

View Item View Item