Structural, Thermal and Electrical Studies of Al2O3 Nanoparticle Soaked Electrolyte Gel Films for Novel Proton Conducting (H+ ion) Eco-friendly Device Applications
Neelesh Rai,
Chandra Prakash Singh,
Lovely Ranjta
Issue:
Volume 10, Issue 1, March 2022
Pages:
1-8
Received:
20 April 2022
Accepted:
10 May 2022
Published:
31 May 2022
DOI:
10.11648/j.nano.20221001.11
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Abstract: An attempt has been made to prepare and characterize ammonium acetate (NH4CH3COO) salt and Aluminium Oxide (Al2O3)-soaked polyvinyl alcohol (PVA) based [PVA-NH4CH3COO:×wt%Al2O3] system nanocomposite polymer gel electrolyte (NCPGE) films using a solution cast technique. The SEM and XRD studies revealed improvement in amorphous nature. The degree of crystallinity and average crystallite size of electrolytes with respect to Al2O3 were projected to ascertain improvement in amorphous nature. FTIR studies confirmed the complexation between PVA, NH4CH3COO and Al2O3. The DSC studies show better thermal response upon addition of Al2O3 nanofiller. TGA studies reveal the mass of nanocomposite polymer gel electrolyte decreases continuously with increase in the Al2O3 nanofiller contents. Closer assessment of conductivity behavior shows two maximas: one around 0.5wt% and the other around 1wt% filler concentration which is a typical feature for nanocomposite gel polymer electrolytes. The temperature dependence of electrical conductivity shows a combination of Arrhenius and Vogel–Tamman–Fulcher (VTF) behavior. The ionic conductivity is found to increase with addition of filler concentration and optimum ionic conductivity of 3.88×10−4 Scm−1 with wide electrochemical stability of ±4.78V is achieved at 1wt% Al2O3 nano filler and confirms the availability of H+ ion (proton) in the system suitable for the development of environment friendly rechargeable batteries application.
Abstract: An attempt has been made to prepare and characterize ammonium acetate (NH4CH3COO) salt and Aluminium Oxide (Al2O3)-soaked polyvinyl alcohol (PVA) based [PVA-NH4CH3COO:×wt%Al2O3] system nanocomposite polymer gel electrolyte (NCPGE) films using a solution cast technique. The SEM and XRD studies revealed improvement in amorphous nature. The degree of ...
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Electronic Structures and Optical Properties for Nano Particles: Experimental and Theoretical Calculations
Abeer E. Aly,
Heba M. Fahmy,
H. H. Medina Chanduvi,
Arles V. Gil Rebaza,
B. Thapa,
A. Shankar
Issue:
Volume 10, Issue 1, March 2022
Pages:
9-13
Received:
27 April 2022
Accepted:
12 May 2022
Published:
14 June 2022
DOI:
10.11648/j.nano.20221001.12
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Abstract: The use of copper nanoparticles (Cu NPs) and copper oxide nanoparticles (Cu2O NPs) has increased dramatically both in the medical and industrial fields. In the present study, we have used various techniques like, dynamic light scattering (DLS) for particle size, zeta potential determination, X-ray diffraction (XRD), transmission electron microscope (TEM) and scanning electron microscope (SEM) for development and characterization of Cu and Cu2O NPs. We have also performed the ab-initio calculations based on the density functional theory (DFT) where the theoretical results are in well accordance with the experimental reports. The Hubbard correction is included over the generalized gradient approximation (GGA) for a better description of Cu and Cu2O NPs. The plot of densities of states (DOS) and energy band structures of Cu and Cu2O nanocrystals predicts the metallic and semiconducting nature of Cu and Cu2O, respectively. The energy bands and DOS shows strong hybridization of Cu-O and predicts the metallic nature of Cu and semiconducting nature of Cu2O. The optical absorption results show that both the Cu2O and Cu samples are absorbing strongly at the minimum energy. The band structure of Cu Nano crystals reveals a metallic nature where the valence band crosses the Fermi energy level at W point. However, an indirect energy band gap can be seen above the EF.
Abstract: The use of copper nanoparticles (Cu NPs) and copper oxide nanoparticles (Cu2O NPs) has increased dramatically both in the medical and industrial fields. In the present study, we have used various techniques like, dynamic light scattering (DLS) for particle size, zeta potential determination, X-ray diffraction (XRD), transmission electron microscope...
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