Regular Article

Local structural study of α-MoO₃ micro-strips using synchrotron X-ray diffraction and X-ray Absorption Spectroscopy at Mo K-edge

¹ Department of Physics, DDSP, Arts Commerce and Science College, Erandol, Jalgaon 425109 (M.S.), India
² Department of Physics, Shri Madhavrao Patil Mahavidyalaya, Murum, Osmanabad 413606, India
³ Department of Physics and RUSA Centre for Advanced Sensor Technology, Dr. Babasaheb Ambedkar Marathwada University, Aurangabad 431004 (M.S.), India
⁴ Department of Electronics, K.R.T. Arts, B.H. Commerce and A.M. Science College, Nashik 422002, India
⁵ Synchrotrons Utilization Section, Raja Ramanna Centre for Advanced Technology, Indore 452013, India
⁶ Atomic & Molecular Physics Division, Bhabha Atomic Research Centre, Mumbai 400094, India
⁷ Beamline Development & Application Section, Bhabha Atomic Research Centre, Mumbai 400094, India
⁸ Advanced Materials Research Laboratory, Department of Physics, Dr. Babasaheb Ambedkar Marathwada University, Aurangabad 431004, India

^* e-mail: upgawai.phys@gmail.com

Received: 21 February 2022
Received in final form: 26 May 2022
Accepted: 23 August 2022
Published online: 26 September 2022

Abstract

The orthorhombic MoO₃ micro-strips sample was synthesized using microwave assisted chemical co-precipitation technique. Synchrotron X-ray Diffraction (SXRD) pattern and Rietveld Refinement was used to estimate structural parameter, crystallite size of sample. It reveals that the synthesized sample MoO₃ crystallized as an orthorhombic phase. X-ray Absorption Spectroscopy (XAS) measurement, which comprises both X-ray Absorption Near Edge Structure (XANES) and Extended X-ray Absorption Fine Structure (EXAFS) techniques, have been carried out on Mo K-edge to probe the local structure of samples. Local structure is also confirmed from the SXRD and Raman spectra of sample. XAS measurement reveals that the first bond length of Mo-O and Mo-Mo is 1.69 and 3.42 Å in orthorhombic MoO₃ respectively. Transmission electron microscopy and SAED patterns showed stripe-like structure and single-crystal formation of MoO₃ respectively.