Amba Sankar, K N (2024) Renewable synthesis of MoO3 nanosheets via low temperature phase transition for supercapacitor application. Renewable synthesis of MoO3 nanosheets via low temperature phase transition for supercapacitor application. ISSN 2045-2322

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Abstract

2D transition metal oxides have created revolution in the field of supercapacitors due to their
fabulous electrochemical performance and stability. Molybdenum trioxides (
MoO3) are one of the
most prominent solid-state materials employed in energy storage applications. In this present work,
we report a non-laborious physical vapor deposition (PVD) and ultrasonic extraction (USE) followed
by vacuum assisted solvothermal treatment (VST) route (DEST), to produce 2D MoO3
nanosheets,
without any complex equipment requirements. Phase transition in MoO3
is often achieved at very
high temperatures by other reported works. But our well-thought-out, robust approach led to a
phase transition from one phase to another phase, for e.g., hexagonal (h-MoO3) to orthorhombic
(α-MoO3) structure at very low temperature (90 °C), using a green solvent (
H2O) and renewable
energy. This was achieved by implementing the concept of oxygen vacancy defects and solvolysis. The
synthesized 2D nanomaterials were investigated for electrochemical performance as supercapacitor
electrode materials. The α-MoO3 electrode material has shown supreme capacitance (256 Fg−
1) than
its counterpart h-MoO3 and mixed phases (h and α) of MoO3
(< 50 Fg−
1). Thus, this work opens up a new
possibility to synthesize electrocapacitive 2D MoO3
nanosheets in an eco-friendly and energy efficient
way; hence can contribute in renewable circular economy

Item Type: Article
Uncontrolled Keywords: Renewable green synthesis, Very low temperature phase transition, h-MoO3, α-MoO3, Mixed phases (h and α) of MoO3, MoO3 2D nanosheets, Supercapacitors
Divisions: PSG College of Arts and Science > Department of Electronics
Depositing User: Mr Team Mosys
Date Deposited: 19 Sep 2024 06:35
Last Modified: 19 Sep 2024 06:35
URI: https://ir.psgcas.ac.in/id/eprint/2264

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