Effect of Cr Doping on the Structural, Optical and Dielectric Properties of MoO<sub>3</sub> Microrods Synthesized by Sol-Gel Auto Combustion Method
Abid Zaman,
Neeraj Kumar Shukla,
Asad Ali,
Aiyeshah Alhodaib,
Vineet Tirth,
Zahraa Hashim Kareem,
Abdullah Hasan Jabbar,
Muhammad Mushtaq,
Mujahid Abbas,
Mona AlHarbi,
Mohammed Aljohani
Affiliations
Abid Zaman
Department of Physics, Riphah International University, Islamabad 44000, Pakistan
Neeraj Kumar Shukla
Electrical Engineering Department, College of Engineering, King Khalid University, Abha 61421, Saudi Arabia
Asad Ali
Department of Physics, Riphah International University, Islamabad 44000, Pakistan
Aiyeshah Alhodaib
Department of Physics, College of Science, Qassim University, Buraydah 51452, Saudi Arabia
Vineet Tirth
Mechanical Engineering Department, College of Engineering, King Khalid University, Abha 61421, Saudi Arabia
Zahraa Hashim Kareem
Medical Instrumentation Techniques Engineering Department, Al-Mustaqbal University College, Babylon 51001, Iraq
Abdullah Hasan Jabbar
Optical Department, College of Health and Medical Technology, Sawa University, Ministry of Higher Education and Scientific Research, Al-Muthanaa, Samawah 66001, Iraq
Muhammad Mushtaq
School of Material Science and Engineering, Beijing University of Technology, Beijing 100124, China
Mujahid Abbas
Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China
Mona AlHarbi
Department of Physics, College of Science and Arts in Al Badaya, Qassim University, Al Badayea 52571, Saudi Arabia
Mohammed Aljohani
Department of Chemistry, College of Science, Taif University, Taif 21944, Saudi Arabia
In the present work, pure and Cr-doped MoO3 microrods were successfully prepared through the sol gel auto combustion method. The phase evaluation and microstructural, dielectric, and optical properties of synthesized samples were investigated by using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and an impedance analyzer (1 MHz–3 GHz). All the samples showed hexagonal structure with space group (P63). According to Vegard’s law, lattice parameters increase with the increase in chromium (Cr3+) contents. In addition, the Williamson–Hall (W–H) plot was drawn for evaluating the micro-strain (εW-H) and crystallite size (DW-H) parameters. From microstructural analysis it was found that the size of microrods increased along with Cr3+ contents. Decreasing band gap energy was observed (from 2.98 to 2.71 eV) with increasing Cr3+ contents. The variation of the dielectric constant and tangent loss of MoO3 microrods with respect to frequency were analyzed.
