Article
Chemistry, Physical
G. Abd Elfadeel, C. Manoharan, Y. Saddeek, M. Venkateshwarlu, R. Venkatachalapathy
Summary: Lithium Ferrite nanoparticles (α-LiFeO2) were synthesized using the solution combustion route with urea as the reducing agent. The prepared nanoparticles were characterized using various techniques at different calcination temperatures. The results showed that the structure, optical, and magnetic properties of α-LiFeO2 nanoparticles changed significantly with increasing calcination temperature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
Mohd Shkir, Aslam Khan, Kamlesh Chandekar, M. A. Sayed, Ahmed Mohamed El-Toni, Anees A. Ansari, Syed F. Adil, Hamid Ghaithan, H. Algarni, S. AlFaify
Summary: An achievement of successful synthesis of nanoscale La@NiO spherical nanoparticles with remarkable improvement in dielectric and electrical properties due to lanthanum doping was reported. Properties such as capacitance, impedance, dielectric constant, dielectric loss, and electrical conductivity were significantly enhanced, showing potential for optoelectronic applications.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Sandip Madhukar Deshmukh, Mohaseen S. Tamboli, Hamid Shaikh, Santosh B. Babar, Dipak P. Hiwarale, Ankush Gautam Thate, Asiya F. Shaikh, Mohammad Asif Alam, Sanjay M. Khetre, Sambhaji R. Bamane
Summary: This study presents a facile and large-scale synthesis method for TiO2 nanoparticles, confirming their structure, properties, and application in photocatalytic degradation. The TiO2 nanoparticles exhibit promising photocatalytic activity and excellent recycling stability, showing potential for efficient large-scale synthesis.
Article
Materials Science, Multidisciplinary
Bingying Wang, Yongjin Wu, Wan Wu, Huigai Wang, Keke Zhang
Summary: In this study, NiO-modified Al2O3 was prepared as the reinforcing phase of the solder matrix using the impregnation method. The morphology, phase composition, and interfacial coherence of the nickel oxide nanoparticles were discussed during the reinforcement preparation. The properties of the composite solder with different NiO-Al2O3 content were also studied. The results showed that a doping content of 0.7 wt% resulted in the strongest metallurgical bond and highest shear strength of the solder joint. The addition of NiO-Al2O3 effectively prevented the diffusion of metal atoms and affected the shear fracture behavior.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Nisha Bala, Gaurav Gupta, Arijit Mitra, Shyama Rath
Summary: The annealing atmosphere (air and oxygen) and temperature can affect the microstructural and magnetic properties of sol-gel synthesized NiO nanoparticles, leading to changes in particle size, lattice constant, and bond length. Air annealing results in larger particle size variations compared to oxygen annealing. The magnetic properties can be extracted from the law of approach to saturation fit of the magnetic hysteresis curves, with the observed two-magnon mode in the Raman spectrum correlating with the antiferromagnetic/ferromagnetic transition.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Achintya Dutta, Akhil Bonagiri, Aditya Nirmale, Ramakrishna Nayak, M. Selvakumar, Shounak De, Vinod Kamath, Prakasha Shetty
Summary: The effects of thermal annealing on screen-printed NiO electrodes for asymmetric battery-type supercapacitors on flexible substrates were investigated. Six morphologically diverse NiO samples were obtained by synthesizing and annealing Ni(OH)2 at different temperatures. The NiO annealed at 400 degrees C demonstrated the highest areal capacitance of 19.54 mF/cm2 and reduced charge-transfer resistance, which was consistent with its highly porous yet continuous structure. An inter-digital asymmetric supercapacitor with NiO-400 cathode and graphene anode exhibited high areal capacitance of 26.42 mF/cm2, a wide potential window of 1.5 V (at 97.3% coulombic efficiency), and excellent flexibility with 96.4% retention (180 degrees) after 1000 cycles.
Article
Materials Science, Multidisciplinary
Youcef Messai, Tayeb Bouarroudj, Abdelmounaim Chetoui, Ilyas Belkhettab, Thaounza Chabi, Marc Schmutz, Hamza Bezzi, Aicha Ziouche, Ali Hafs, Djamel Eddine Mekki
Summary: Nickel oxide nanoparticles were prepared using environmentally friendly methods and characterized using various techniques. Nickel oxide prepared at pH 9 exhibited the highest magnetic properties and catalytic activity.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Linlin Yang, Ren He, Xiang Wang, Tingting Yang, Ting Zhang, Yong Zuo, Xuan Lu, Zhifu Liang, Junshan Li, Jordi Arbiol, Paulina R. Martinez-Alanis, Xueqiang Qi, Andreu Cabot
Summary: Direct urea fuel cells (DUFCs) offer a solution for treating residual wastewater and generating electricity. The use of self-supported electrodes consisting of NiO nanosheets grown on CuO nanowires proves to be effective for urea oxidation reaction (UOR). These electrodes exhibit excellent UOR performance, requiring 1.39 V vs. RHE to achieve a current density of 100 mA/cm2. Additionally, the DUFCs demonstrate high open circuit voltages and power densities of 0.88 V and 11.35 mW/cm2, respectively. The formation of NiOOH and the presence of a NiO/CuO p-p heterostructure contribute to the enhanced performance through improved charge transfer and modulated electronic states.
Article
Materials Science, Multidisciplinary
Shahzadi Noreen, Abid Hussain
Summary: The nanostructured Cu0.25M0.75Fe2O4 (M = Mn, Mg, Ni, Co) ferrites were synthesized by the sol-gel auto-combustion method, and their structural, magnetic, morphological, and optical properties were investigated. XRD, UV-Vis, VSM, SEM, EDX, and FTIR were employed for characterization. The obtained spinel ferrites were found to be single-phased spinels with no secondary phase peaks. The substitution of M in Cu0.25M0.75Fe2O4 ferrites affected their magnetic properties, resulting in a transition from ferrimagnetic to ferromagnetic behavior. The UV-Vis analysis showed that the ferrites had a direct band gap.
Article
Engineering, Electrical & Electronic
Surirat Yotthuan, Siradanai Rueanngam, Supree Pinitsoontorn, Suphornphun Chootin, Theerachai Bongkarn
Summary: NiO doping can enhance the density and dielectric constant of KNLNS-BS ceramics, displaying paramagnetic behavior at a temperature of 50 K.
INTEGRATED FERROELECTRICS
(2021)
Article
Materials Science, Multidisciplinary
Kh. Roumaih, S. M. Ismail, Sh. Labib, Ahmed Helal
Summary: The sol-gel method was used to prepare nanocomposites ZF/RO (ZF = ZnFe2O4, RO = CdO, NiO, Ga2O3, SnO2, and TiO2). XRD analysis showed that the crystal structure of ZF/RO nanocomposite contained multiple phases, and the lattice properties and crystal size of ZF were influenced by the presence of RO traces. SEM images revealed that all samples had nanoflake-like surfaces with varying sizes, except for ZF/Cd which had a nanotube microstructure. Room temperature ESR and VSM measurements confirmed ferrimagnetic behavior for all samples. The optical properties revealed different band gaps and spectral PL intensities for the ZF/RO nanocomposites. The ZF/RO nanocomposites showed potential photocatalytic efficacy due to their practical sunlight consumption ability and recombination of photoinduced charge carriers.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Spectroscopy
Anoop Sunny, Karthikeyan Balasubramanian
Summary: In this study, the phonon, magnon, and magnetic properties of copper-doped nanocrystalline nickel(II) oxide were extensively studied using room-temperature Raman spectroscopy. The observed deviations in the wavenumbers of phonon modes from theoretical predictions were attributed to the phonon-magnon interaction. The variations in magnon excitations with the concentration of Cu doping were investigated and the suppression and blue shifting of the two-magnon excitations indicated changes in the magnetic behavior. The modifications in the antiferromagnetic nature and the formation of multiphase magnetic properties were investigated using a vibrating sample magnetometer.
JOURNAL OF RAMAN SPECTROSCOPY
(2022)
Article
Nanoscience & Nanotechnology
David A. Garfinkel, Nan Tang, Grace Pakeltis, Reece Emery, Ilia N. Ivanov, Dustin A. Gilbert, Philip D. Rack
Summary: The magnetic and optical properties of AuxCo1-x thin films and nanoparticles can be tuned by controlling their chemical composition and morphology. Annealing leads to phase separation and enhances the magnetic properties. The optical properties are greatly influenced by the chemical morphology, where phase separation enhances the quality factor and optical absorption.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Energy & Fuels
Hala T. Handal, Walied A. A. Mohamed, Ammar A. Labib, Samia A. Moustafa, Alaa A. Sery
Summary: In this study, surface-functionalized mesoporous NiO nanoparticles were successfully synthesized using a facile one-pot precipitation method, with different bases affecting the surface modification and formation mechanism of NiO. The surface functionalization was found to significantly impact the electronic, optical, and magnetic properties of NiO, providing new perspectives for various applications.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Chemistry, Physical
Jorge Durango-Petro, Christopher Salvo, Jonathan Usuba, Gonzalo Abarzua, Felipe Sanhueza, Ramalinga Viswanathan Mangalaraja
Summary: In this study, Nickel oxide-gadolinium doped ceria (NiO-GDC) nanocomposite powders were synthesized via fast solution combustion technique using different mixing methods. The calcined nanocomposites showed variations in microhardness based on the synthesis approach, with a higher microhardness obtained for samples synthesized through the CM method. However, despite the lengthy ball-milling process compared to hand mortar, no significant improvement in the electrical properties was observed.
Article
Materials Science, Multidisciplinary
S. A. Ashika, S. Balamurugan, N. Palanisami
Summary: This study investigated the solar reflective and color pigmentation effectiveness of multifunctional binary oxides using XRD and DRS techniques. The results showed that Gd2O3, Sb2O3, Ta2O5, Nb2O5, and Y2O3 exhibited interesting features in the NIR region, while MnO2 and Cr2O3 had lower NIR reflectance.
EMERGENT MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Olga Maria Baby, S. Balamurugan, S. A. Ashika, T. K. Sana Fathima
Summary: This study reports the different methods and characterizations of BaMoO4 materials. Regardless of the method used, all samples have a tetragonal symmetry crystalline structure in pure form. The ball-milled BaMoO4 materials have smaller crystalline size compared to the co-precipitation method. The optical properties reveal a band gap of 3.51-4.35 eV for different BaMoO4 materials. The co-precipitation method exhibits better near-infrared reflectance for BaMoO4 materials.
EMERGENT MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
A. Saliha Marjuka, S. Balamurugan, S. A. Ashika, T. K. Sana Fathima
Summary: In this work, combustion synthesis of nanocrystalline Y2O3 materials using different fuels was carried out. The properties of the combustion products were found to vary depending on the fuels used, with the combustion product of PEG(200) showing the highest weight loss at 800 degrees C. The UV-vis-NIR features of different samples showed interesting results, and the Y2O3 nanomaterials derived from PEG(200) exhibited a high reflectance in the NIR region.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
S. A. Ashika, S. Balamurugan, A. Saliha Marjuka, T. K. Sana Fathima
Summary: Different synthesis conditions result in different crystal phases and thermal features of the materials. Manual mixing and subsequent wetting and wet chemical route produce a single Sb2O3 phase, while ball-milling and molten flux techniques yield different phases. Raman and UV-Vis spectra analysis show that the identified Sb2O3 phase materials are suitable for solar and color reflective pigment applications.
EMERGENT MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Meloth Bhavisha, Saralabhai Aswani, Awadakkam Sreenavya, P. Purayil Neethu, I. Gopinathan Archana, Sarkarainadar Balamurugan, Venkatachalam Ganesh, Ayyamperumal Sakthivel
Summary: SrBO3-delta (B=Fe & Co) type perovskite oxides and their 25% molybdenum doped counterparts, SrFe0.75Mo0.25O3-delta (SFMO) and SrCo0.75Mo0.25O3-delta (SFCO), were synthesized and characterized. The results showed the formation of pure cubic phase and doped molybdenum in the perovskite crystal lattice. The TPR-H-2 and TGA curves revealed variable oxidation states and the formation of oxygen vacancies. The SFMO catalyst exhibited superior activity for the oxidation of iso-eugenol to vanillin.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
T. K. Sana Fathima, S. Balamurugan, S. A. Ashika
Summary: This study successfully synthesized nanocrystalline AWO (4) (A = Ba, Sr, and Ca) materials via combustion followed by annealing. The characterization results showed that the annealed samples exhibited pure scheelite phase and the lattice parameters of scheelite phases varied significantly with the difference in the ionic radii of the alkaline earth metals (A). The band gap (E-g) values in the AWO (4) series were found to be 5.63, 5.3, and 5.12 eV for A = Ba, Sr, and Ca, respectively.
EMERGENT MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
S. Balamurugan, S. A. Ashika, T. K. Sana Fathima
Summary: Several nanocrystalline SbO2 phase materials were obtained by annealing the as-synthesized Sb2O3 phase materials prepared with varying amounts of deionized water as a solvent. The high-pressure and high-temperature method produced monoclinic beta-Sb2O4 phase for the alpha-Sb2O4 powder, while conventional heat treatment formed orthorhombic SbO2 phase. The annealed materials showed consistent orthorhombic structure and different morphological features.
EMERGENT MATERIALS
(2023)
Correction
Chemistry, Multidisciplinary
S. A. Ashika, S. Balamurugan, T. K. Sana Fathima
RESULTS IN CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Sharin Maria Thomas, S. Balamurugan, S. A. Ashika, T. K. Sana Fathima
Summary: Different methods, including high-energy ball milling, mechanical stirring, and wet chemical methods, were employed to obtain nanocrystalline CaMoO4 materials. Interestingly, pure tetragonal CaMoO4 phase could be easily obtained through mechanical stirring of CaCO3 and MoO3 precursors with deionized water. The processed CaMoO4 materials showed reduced average crystalline size and relatively low weight loss compared to contaminated samples. The optical properties of the CaMoO4 phase were supported by Raman spectral analyses. The morphology of the processed CaMoO4 materials exhibited agglomerated round-shaped particles.
RESULTS IN CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
S. A. Ashika, S. Balamurugan, T. K. Sana Fathima, N. Palanisami, T. Viswanathan
Summary: In order to compare the different synthesis methods of Cr2O3 nanomaterials, various approaches including precipitation, hydrothermal, ball milling, and thermal treatment methods were used. The obtained Cr2O3 nanomaterials were characterized using different techniques to examine their structure, microstructure, thermal, and optical properties. The results showed that the precursor transformed from amorphous to nanocrystalline Cr2O3 phase upon heat treatment. The UV-Vis measurements revealed variations in absorbance intensity and calculated energy band gaps. The NIR reflectance of the Cr2O3 nanomaterials exhibited significant changes in the 750-2500 nm region. Raman spectroscopy showed characteristic peaks for the nanocrystalline Cr2O3 phase materials.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
M. Bhavisha, S. Balamurugan, S. A. Ashika, N. J. Venkatesha, T. Maiyalagan, A. Sakthivel
Summary: A series of copper-doped perovskite strontium ferrites were successfully prepared and characterized. The presence of iron and copper ions, as well as oxygen vacancies, was confirmed. The formation of nanoparticles was observed by scanning electron microscopy. The catalytic test results demonstrated that the synergy between copper and oxygen vacancies facilitated the hydroxylation reaction of anisole.
MATERIALS TODAY SUSTAINABILITY
(2023)
Article
Chemistry, Inorganic & Nuclear
S. Balamurugan, Sharin Maria Thomas, S. A. Ashika, T. K. Sana Fathima
Summary: We synthesized CaWO4 phase materials under different conditions and investigated their phase identification and properties. Solid state reaction at 850 degrees C forms CaWO4 phase, while ball milling under varied processing conditions leads to interesting and debatable results. Dry ball milling produces CaWO4 phase, while wet ball milling with ethanol and/or water as solvent results in WO3 as the main phase. Annealing the ball-milled powder at 850 degrees C yields CaWO4 as the major phase and WO3 as secondary phase. The optical properties of pure CaWO4 phase materials were examined and the NIR features were reduced by ball milling. The CaWO4 phase obtained by solid state reaction method shows higher NIR reflectance, making it suitable for solar reflecting roof and color pigmentation applications.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
S. A. Ashika, S. Balamurugan, T. K. Sana Fathima
Summary: A simple precipitation synthesis method was used to obtain Mn3O4 powder with an average crystalline size of 27.8 nm. The as-precipitated product exhibited a tetragonal crystal structure with lattice parameters of a = 0.5761(3) nm and c = 0.9451(6) nm. The as-precipitated product showed rod-shaped morphology with a diameter of around 400 nm, and spherical particles with a size of approximately 50 nm. The thermal profiles indicated a weight loss of about 4% for the as-precipitated product powder up to 1000 degrees C, without any exothermic or endothermic peaks.
Article
Chemistry, Multidisciplinary
S. Balamurugan, S. A. Ashika, J. Jainshaa
Summary: CeO2, MgO, and NiO nanomaterials were successfully prepared using combustion and precipitation methods. The XRD structural features of the CeO2 materials obtained from the two methods were significantly different. Annealing treatment enhanced the nanocrystalline nature and resulted in the formation of pure MgO, NiO, and CeO2 phases. The NIR reflectance study showed that MgO and CeO2 nanomaterials had high NIR reflectance values, making them suitable for NIR reflecting solar and color pigmentation applications.
RESULTS IN CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
S. Balamurugan, J. Jainshaa, S. A. Ashika
Summary: The s, p, d, and f block simple oxides of MgO, SnO2, NiO, and CeO2 materials were synthesized by precipitation method and compared in this article. The tetragonal SnO2 and cubic CeO2 phases form in a single-step synthesis process. The as-prepared trigonal (P-3 m1 (164)) Mg(OH)2 and Ni(OH)2 phase materials transform into cubic (Fm-3 m (22 5)) oxides of MgO and NiO upon annealing, with a significant variation in the refined lattice parameters. The nanocrystalline SnO2 and CeO2 materials obtained in a single-step process have an average crystalline size of 2 nm, while the MgO and NiO phases obtained through annealing have sizes of 13.76 nm and 21.44 nm, respectively. The different FTIR bands are observed between the wavenumber 4000 and 400 cm-1 for the samples in this series.
RESULTS IN CHEMISTRY
(2023)