International Journal of Materials Research

Published by De Gruyter

Volume 112 Issue 12

December 2021

Issue of International Journal of Materials Research

Contents
Journal Overview

Publicly Available December 30, 2021

Page range: 935-935

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Editorial

December 30, 2021

International Conference on Energy and Environment

Page range: 936-936

Original Contributions

Publicly Available November 5, 2021

Supercapacitor electrodes based on modified titania nanotube arrays on flexible substrates

Kunnambeth M. Thulasi, Sindhu Thalappan Manikkoth, Anjali Paravannoor, Shajesh Palantavida, Baiju Kizhakkekilikoodayil Vijayan

Page range: 937-944

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Abstract

Highly ordered titania nanotube arrays were synthesised on titanium metal foil through electrochemical anodisation. The annealed samples were characterised through scanning electron microscopy and X-ray diffraction analysis. The electrochemical characterisations of the arrays were done through cyclic voltammetry, galvanostatic charge discharge and electrochemical impedance spectroscopy analyses. The titania nanotube arrays exhibited a specific capacitance of 6.8 mF cm –2 at 5 mV s –1 scan rate, which is very much higher than that reported earlier. Pseudocapacitive metal oxides were deposited on these arrays forming composite supercapacitor electrodes and their supercapacitor properties were compared with same deposited on bare titanium foil substrates. Pseudocapacitive metal oxides deposited on these titania nanotube array substrates exhibited improved supercapacitor performance and stability over the same deposited on titanium foil substrates.

December 30, 2021

A promising rosy future for supercapacitors: Suitability of MoS₂ hollow nanoroses for supercapacitor electrodes

J. S. Arya Nair, S. Chirag, K. Y. Sandhya

Page range: 945-948

Abstract

In this work, we investigate the supercapacitive properties of MoS 2 hollow nano-roses with an open cavity at the centre. The synthesized nano MoS 2 delivered specific capacitance of 180 F g –1 at 1 A g –1 , whereas it was around 22 F g –1 for the bulk MoS 2 , which was synthesized in the absence of the micelle. The cycling stability was very high and retained 98% up to 500 cycles, 85% after 3500 cycles and 80% of the initial capacity at 5000 cycles. The enhanced specific capacitance and cycling stability of the nano MoS 2 is probably due to its flower-shaped morphology which consist of thin sheets of MoS 2 and with a hollow cavity which increases the accessible surface area and stability, respectively.

December 30, 2021

Efficient photoluminescence from 1-(2-Naphthoyl)-3,3,3-trifluroacetonate complex of Eu³⁺ with bidentate neutral donors

D. B. Ambili Raj, S. V. Manoj

Page range: 949-954

Abstract

Two new europium complexes, Eu(NTA) 3 (bath) and Eu(NTA) 3 (DPEPO), were synthesized and characterized by elemental analysis, Fourier transform infrared, mass spectrometry, thermogravimetric analysis and photoluminescence spectroscopy. The room-temperature photoluminescence spectra of the Eu 3+ complexes are composed of the typical Eu 3+ red emission, assigned to transitions between the first excited state ( 5 Δ 0 ) and the multiplet ( 7 F 0-4 ). The results demonstrate that the substitution of water molecules by bidentate oxygen or nitrogen ligands in Eu(NTA) 3 (H 2 O) 2 richly enhances the overall quantum yield ( Φ overall = 12% vs. 87%) and life time values ( τ obs = 339 vs. 521 μs).

December 30, 2021

Novel homo-epitaxial approaches in solvothermal synthesis for preparing surface tethered uni-directionally oriented zinc oxide micro and nano structured arrays

Anas Shereef, Shajesh Palantavida, Marottikunnathu Raman Chandran, Kiran Mohan, Solaiappan Ananthakumar

Page range: 955-962

Abstract

Surface aligned, uni-directionally grown, hexagonal nanorod bundles and microrod pillared arrays of zinc oxide (ZnO), were synthesized through a simple, homo-epitaxial growth approach. A uniform layer of ZnO seed was initially prepared on cleaned glass substrates by dip coating and calcination. Uni-directionally oriented ZnO micro– nano structures were subsequently developed on the seeded glass substrates through solvothermal methods, by employing equi-molar solutions of zinc nitrate and hexamethylenetetramine. The reaction parameters that control the surface morphologies and crystal orientations were explored. A solution exchange process was also carried out to prepare perpendicularly aligned ZnO nanorod arrays. The structural and functional features of the resultant samples were studied and discussed with the help of X-ray diffractometry, scanning electron microscopy, high-resolution transmission electron microscopy and photoluminescence spectrophotometry. A plausible structure dependent growth mechanism of the morphologically varied ZnO was also proposed.

December 30, 2021

Bio-synthesis, characterization and antibacterial studies of ZnO nanoparticles

B. R. Aswathy, Dalia Vishnudasan, P. K. Manoj

Page range: 963-968

Abstract

Zinc oxide, a well-known inorganic metal oxide, in nanoparticle form exhibits photo-catalysis, antimicrobial behavior and is also employed in energy cells as well as sensor devices. In the present study, zinc oxide nanoparticles (ZnO NPs) were synthesized using Adathoda beddomei (A. Beddomei) leaf extract as well as Plectranthus barbatus (P. Barbatus) leaf extract. X-ray diffraction studies confirmed the presence of hexagonal wurtzite structure of ZnO NPs having the least particle size ∼ 18–24 nm, with preferential growth along (101) plane. The UV–visible absorbance spectrum of ZnO NPs exhibited the absorbance band in the range 371– 375 nm. Photo luminescence spectra dominated by a strong luminescence peak at ∼384–394 nm followed by low intensity peaks at ∼444–487 nm. Fourier transform infrared spectra confirmed the presence of ZnO NPs as well as the functional groups of plant extracts. Antibacterial properties of synthesized ZnO NPs were evaluated against Gram-negative bacteria– Escherchia coli ( E. coli ) and Gram-positive bacteria– Listeria monocytogenes . Both bio-synthesized ZnO NPs exhibit significant antibacterial activity only against E. coli . The zones of inhibition were found to be 7 mm and 9 mm for A. Beddomei and P. Barbatus respectively. This study demonstrates utilization of A. Beddomei and P. Barbatus leaf extract for the efficient synthesis of ZnO NPs using a biosynthesis method to obtain significant antibacterial activity.

December 30, 2021

Surfactant assisted one-pot synthesis of copper nanoparticle arrays and their hydrogenation efficiency

Revathi Kottappara, Shajesh Palantavida, Baiju Kizhakkekilikoodayil Vijayan

Page range: 969-974

Abstract

Copper nanoparticle arrays were synthesized by the aqueous phase chemical reduction of Cu 2+ to Cu 0 using glucose as an environmentally benign reducing agent. The UV absorption spectrum exhibited an absorption band at 554 nm revealing the presence of metallic copper nanoparticles. The catalytic properties of the synthesized copper nanoparticle arrays were investigated by reducing 4-nitrophenol (Nip) into 4-aminophenol (Amp) in the presence of NaBH 4 . In comparison to the commercial copper metal powder, copper nanoparticle arrays exhibited highly improved catalytic performance on the reduction of nitrophenol. The current synthesis approach of pure copper nanoparticle arrays does not require rigorous conditions or toxic agents, and hence it is a rapid, efficient, and green approach for the development of active metallic catalysts.

December 30, 2021

Synthesis and characterization of nano NiZrO₃ for optical and dielectric applications

Fathima Riyaz, Vadakkethil Lalitha BhaiPushpa, Vidya Sukumaran

Page range: 975-979

Abstract

Nanocrystalline semiconducting NiZrO 3 is prepared via a modified combustion process. The X-ray diffraction pattern shows that the so formed nanopowder is single phase and has an orthorhombic structure. The crystalline size of the as-prepared powder determined using the Scherrer formulae is 22 nm. The UV–visible spectrum revealed that nano NiZrO 3 exhibited an intense absorption band in the ultra violet region and the calculated band gap is 4.25 eV, which suggest the material is a wide band gap semiconductor. The material shows good photo luminescence behaviour with intense emission in the blue region. The material is sintered at a temperature of 1220°C in a microwave furnace. Variation of dielectric properties of this material with frequency and temperature are also analyzed. This material shows good optical and dielectric properties which make it an ideal multi-functional material.

December 30, 2021

Lactose monohydrate (C₁₂H₂₂O₁₁ · H₂O) mediated synthesis and spectral analysis of nanocrystalline Ni_0.5Cu_0.5Fe₂O₄

Vibhu T. Sivanandan, Arun S. Prasad

Page range: 980-984

Abstract

Ni 0.5 Cu 0.5 Fe 2 O 4 nanocrystalline spinel ferrite was synthesized through a lactose monohydrate (C 12 H 22 O 11 · H 2 O) mediated chemical preparation technique (post annealed at 600°C for 4 h). Various analytical results obtained after characterization measurements such as X-ray powder diffraction, ultra violet–visible spectroscopy and Fourier transform infrared spectroscopy measurements were discussed. X-ray diffraction pattern analysis confirmed the formation of nanocrystalline face-centered cubic lattice phase of Ni 0.5 Cu 0.5 Fe 2 O 4 with crystallite size ∼ 9 nm. The Tauc plot corresponding to ultra violet–visible reflectance data employing the Kubelka– Munk function provided a direct transition band gap of 4.92 eV. The characteristic tetrahedral and octahedral vibration bands observed in the Fourier transform infrared spectrum further confirmed that Ni 0.5 Cu 0.5 Fe 2 O 4 nanoparticles were crystallized in spinel structure.

December 30, 2021

The antimicrobial efficacy of biosynthesized nanostructured ceria

P. S. Prabha Jyothi, B. Anitha, Nisha J. Tharayil

Page range: 985-989

Abstract

Biosynthesis of metal oxide nanoparticles is an emerging eco-friendly approach. Currently, researchers have been developing various nanomaterials with effective antimicrobial properties with less toxicity to humans. Here, nanostructured ceria or cerium oxide nanoparticles of average crystallite size ∼ 5 nm are synthesized by a chemical co-precipitation method using cerium nitrate hexa hydrate and sodium hydroxide as starting materials. The most fascinating bio-material known to man, deoxyribo nucleic acid (DNA) is used as a biological capping agent to get well dispersed nanoparticles. The structural and morphological characterization of prepared samples was conducted using X-ray diffraction, high resolution transmission electron microscopy and Fourier transform infrared spectroscopy. The synthesized cerium oxide nanoparticle showed potential antibacterial activity against both bacteria and fungi under investigation. The results also showed that the synthesized nanoceria can be used to inhibit the growth of several fungi which will be useful for a number of applications in the biomedical field.

December 30, 2021

Synthesis and evaluation of chloro SPIRO and amino SPIRO supports: Novel hydrophilic cross-linked polystyrene polymers for solid phase peptide synthesis

Sneha Jayan Sudha, M. A. Siyad

Page range: 990-997

Abstract

Synthesis of a novel, beaded, hydrophobic/hydrophilic balanced and chemically robust chloro SPIRO polymer matrix consisting of styrene and 4-Chloromethyl styrene (VBC) as backbone and 3,9-Divinyl-2,4,8,10-tetraoxaspiro[5.5]undecane as cross-linking units is demonstrated here. The suspension polymerisation technique was preferred to achieve complete monomer to polymer conversion as well as to attain spherical beaded form. Two different cross-linking densities (2 and 4 mol.%) of polymer supports were synthesized and the composition of the functional bearing site VBC was fixed as 3 mol.% for both supports. The integrity of chloro SPIRO polymer formed was verified by Fourier transform infrared spectroscopy and scanning electron microscopy analysis. Chloro SPIRO resin was subjected to Gabriel Phthalimide reaction to form amino SPIRO resin. Chemical integrity of chloro SPIRO resin was tested in different standard solid phase peptide synthetic conditions and swelling capacity was studied using amino SPIRO resin in different polar solvent conditions. The synthetic capacity of novel amino SPIRO polymer matrix was evaluated by synthesising classically challenging acyl carrier protein peptide by Fmoc strategy. The purity of peptide was checked by high performance liquid chromatography and mass by matrix assisted laser desorption.

Notifications

December 30, 2021

DGM News

Page range: 998-1000

December 30, 2021

Author index

Page range: 1000-1007

December 30, 2021

Keyword index

Page range: 1008-1012

About this journal

The International Journal of Materials Research (IJMR) publishes original high quality experimental and theoretical papers and reviews on basic and applied research in the field of materials science and engineering, with focus on synthesis, processing, constitution, and properties of all classes of materials. Particular emphasis is placed on microstructural design, phase relations, computational thermodynamics, and kinetics at the nano to macro scale. Contributions may also focus on progress in advanced characterization techniques.
All articles are subject to thorough, independent peer review.

Volume 112 Issue 12

Issue of International Journal of Materials Research

Contents

International Conference on Energy and Environment

Supercapacitor electrodes based on modified titania nanotube arrays on flexible substrates

Abstract

A promising rosy future for supercapacitors: Suitability of MoS2 hollow nanoroses for supercapacitor electrodes

Abstract

Efficient photoluminescence from 1-(2-Naphthoyl)-3,3,3-trifluroacetonate complex of Eu3+ with bidentate neutral donors

Abstract

Novel homo-epitaxial approaches in solvothermal synthesis for preparing surface tethered uni-directionally oriented zinc oxide micro and nano structured arrays

Abstract

Bio-synthesis, characterization and antibacterial studies of ZnO nanoparticles

Abstract

Surfactant assisted one-pot synthesis of copper nanoparticle arrays and their hydrogenation efficiency

Abstract

Synthesis and characterization of nano NiZrO3 for optical and dielectric applications

Abstract

Lactose monohydrate (C12H22O11 · H2O) mediated synthesis and spectral analysis of nanocrystalline Ni0.5Cu0.5Fe2O4

Abstract

The antimicrobial efficacy of biosynthesized nanostructured ceria

Abstract

Synthesis and evaluation of chloro SPIRO and amino SPIRO supports: Novel hydrophilic cross-linked polystyrene polymers for solid phase peptide synthesis

Abstract

DGM News

Author index

Keyword index

A promising rosy future for supercapacitors: Suitability of MoS₂ hollow nanoroses for supercapacitor electrodes

Efficient photoluminescence from 1-(2-Naphthoyl)-3,3,3-trifluroacetonate complex of Eu³⁺ with bidentate neutral donors

Synthesis and characterization of nano NiZrO₃ for optical and dielectric applications

Lactose monohydrate (C₁₂H₂₂O₁₁ · H₂O) mediated synthesis and spectral analysis of nanocrystalline Ni_0.5Cu_0.5Fe₂O₄