Article
Chemistry, Physical
J. Divya, N. J. Shivaramu, W. D. Roos, W. Purcell, H. C. Swart
Summary: Sm3+ doped Bi2O3 powders were prepared by a co-precipitation method, and their crystal structures, morphology, elemental compositions, luminescence properties, etc. were characterized and analyzed in detail. The band gap of the isolated products remained around 2.85 eV for different Sm3+ concentrations, and the maximum photoluminescence intensity was obtained at a doping concentration of 4 mol% Sm3+.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
B. Karthikeyan
Summary: The present study extensively investigated the optical and Raman spectral properties of Ni-doped CuO nanoparticles prepared using the sol-gel method. The results showed a redshift in Raman peak position due to the doping of Ni ions. The influence of Ni doping on electron-phonon coupling and phonon lifetimes was thoroughly studied in this work.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Materials Science, Ceramics
Housei Akazawa
Summary: The process conditions for selectively forming crystal polymorphs in Er3+-doped Bi2O3 films were investigated. The critical factor controlling the crystal polymorphs was Er content. Different structures appeared at different temperatures. The photoluminescence (PL) activity of dopant Er3+ strongly depended on the crystal polymorphs.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Rajamani Nagarajan, Vipul Shrivastava, Jyoti Pandey
Summary: This study stabilized metastable gamma-Bi2O3 without impurities and investigated the effects of indium ion doping on its structure and optical properties. Doping with indium resulted in changes in color and optical bandgap, with non-stoichiometric samples exhibiting lower bandgap values. Additionally, indium-doped non-stoichiometric Sillenites displayed higher BET surface area and slightly increased oxygen ion conductivity compared to stoichiometric counterparts.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Chemical
Israfil Sabikoglu
Summary: This study investigated the synthesis and luminescence characterization of Samarium (Sm3+) doped lithium metasilicate (Li2SiO3) phosphor ceramic. The results obtained on the luminescence and other optical studies were presented and discussed, including X-ray diffraction (XRD), optical absorption, and luminescence properties. The doping had no significant effect on the crystal structure, and the maximum photoluminescence (PL) emission was observed in the visible region. Complex peak structures were observed in the glow curves after irradiation, and a wide peak in the radioluminescence (RL) spectrum was attributed to silicate.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Optics
Jamila S. Alzahrani, Alaa Hammoud, Abeer S. Altowyan, I. O. Olarinoye, Andrei V. Lebedev, M. S. Al-Buriahi
Summary: Five transparent and non-toxic glasses with varying Bi2O3 content were synthesized and characterized for their physical, optical, structural and gamma radiation attenuation attributes. The results showed that the glass density, direct optical bandgap, and gamma ray absorption improved with increasing Bi2O3 content. TMBS-5Bi was found to be the best photon absorber, while TMBS-0Bi was the weakest. TMBS-5Bi offers a good alternative as a transparent and environmentally friendly glass for radiation control applications.
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
Materials Science, Ceramics
M. S. Al-Buriahi, Manal Hessien, Faisal Alresheedi, Ateyyah M. Al-Baradi, Z. A. Alrowaili, Imen Kebaili, I. O. Olarinoye
Summary: This paper synthesized ZnO-Bi2O3 nanocomposites and characterized their optical, structure, and radiation shielding properties. Through analysis of FTIR and UV spectra, the nanocomposites showed promising photon shielding abilities. The materials could potentially enhance the photon shielding competence of existing composite materials.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Caique D. A. Lima, Joao V. B. Moura, Gardenia S. Pinheiro, Jefferson F. D. F. Araujo, Suziete B. S. Gusmao, Bartolomeu C. Viana, Paulo T. C. Freire, Cleanio Luz-Lima
Summary: In this study, the structural and phonon properties of cobalt-doped orthorhombic molybdenum trioxide hierarchical microrods were investigated. The impact of different cobalt concentrations and a temperature-dependent phase transition were observed, providing insights into the material stability under varying conditions.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Chemical
Li Kan, Weina Mu, Chun Chang, Fei Lian
Summary: Graphitic carbon-doped alpha-Bi2O3/beta-Bi2O3/Bi5O7I ternary heterojunction photocatalysts were successfully synthesized via a simple and low-cost method using urea, malonic acid, and BiOIO3. The photocatalytic activity of the catalysts was evaluated by the degradation of Bisphenol A (BPA) under simulated sunlight irradiation. The graphitic carbon-doped alpha-Bi2O3/beta-Bi2O3/Bi5O7I photocatalysts exhibited significantly higher reaction rate constants compared to other catalysts, thanks to the synergistic effect of the heterojunction between different components and the efficient electron transfer efficiency of graphitic carbon. A dual S -scheme heterojunction mechanism was proposed to explain the excellent redox properties of the composites.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Victor V. Maltsev, Elena A. Volkova, Elizaveta V. Koporulina, Diana D. Mitina, Vladimir L. Kosorukov, Anna I. Jiliaeva, Daniil A. Naprasnikov, Konstantin N. Gorbachenya, Viktor E. Kisel
Summary: The phase relationships, crystal properties and luminescence kinetics of two complex systems were studied, including unit cell parameters, segregation coefficients of impurities, and lifetimes of energy levels.
Article
Materials Science, Ceramics
K. Hembram, T. N. Rao, R. S. Srinivasa, A. R. Kulkarni
Summary: The study found that CaO doping significantly affects the microstructure and electrical properties of the ZnO-Bi2O3 system, resulting in changes in grain size and density. Analysis through X-ray diffraction and impedance spectroscopy revealed the crystal growth mechanism and conductivity behavior after CaO doping.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Iliyasu Usman, Mohamad Syazwan Mohd Sanusi, Nor Ezzaty Ahmad, Mohd Shafiq bin Shaharin
Summary: The influence of & alpha;-Fe2O3 nanoparticles on the structural, physical, and optical properties of synthesized glass was investigated. The addition of & alpha;-Fe2O3 led to changes in density, molar volume, B-O-B bond intensity, optical band gap, transmission coefficient, reflectance loss, Urbach energy, interatomic separation, metallization, refractive index, molar refractivity, electronic polarizability, and dielectric constant. The glass with & alpha;-Fe2O3 showed semiconductor properties and is suitable for photonic applications.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Yang Wang, Changlong Yang, Qingjiang Kong, Xinglin Wu, Zhongrui Zhang
Summary: This work reports the synthesis of (Ni0.2Cu0.2Zn0.6O)(1.03)(Fe2O3)(0.97) ferrites and the use of LMZBS-Bi2O3 as a dopant to regulate the microstructure and magnetic properties. The crystal phase and microstructure of the doped ferrites were characterized by XRD and SEM, respectively. The magnetic properties including Ms, Hc, Q-factor, permeability, and power loss were investigated and analyzed. The results showed that the doped ferrites exhibited a uniform and dense microstructure, with the highest Ms, Q-factor, magnetic permeability, as well as the lowest Hc and Pcv. Overall, the LMZBS-Bi2O3 doped NiCuZn ferrites showed outstanding microstructure and magnetic properties, making them promising for various applications.
MATERIALS RESEARCH EXPRESS
(2023)
Article
Materials Science, Ceramics
Kai Zhou, Chongjun He, Yiyang Wen, Guisheng Xu, Chenguang Deng, Yiyang He, Yuangang Lu, Qian Li
Summary: The tetragonal relaxor ferroelectric single crystal PIN-PMN-PT exhibits excellent piezoelectric and electromechanical properties. This paper investigates its piezoelectric and electro-optical properties, and provides a complete set of piezoelectric, dielectric, and elastic coefficient matrices. The results demonstrate the crystal's wide operating temperature range, stable performance with frequency variation, and potential application in new electro-optical devices.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Engineering, Electrical & Electronic
K. Lakshmanamoorthy, S. Manivannan
Summary: Three different ionic liquids based on 1-butyl-3-methylimidazolium were prepared for synthesizing Ag/AgX-rGO nanocomposites, displaying excellent photocatalytic properties, with the samples containing Ag/AgX structures showing enhanced efficiency. The plasmonic silver in Ag/AgX-rGO samples increased sunlight utilization, while rGO facilitated rapid charge separation, resulting in higher dye degradation efficiency.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Physics, Multidisciplinary
A. Bismibanu, M. Alagar, I. B. Shameem Banu, Pradeep Reddy Vanga, Thangaraj Selvalakshmi, M. Ashok
Summary: A series of samples with Pr substituted at the Bi site of BiFeO3 were studied to analyze the impact of Pr concentration on the structural, magnetic, ferroelectric, electrical, morphological, and semiconducting properties. The study showed that higher Pr dopant improved the ferroelectric and magnetic properties.
BRAZILIAN JOURNAL OF PHYSICS
(2022)
Article
Materials Science, Ceramics
Gonzalo Abarzua, Rednam Udayabhaskar, Ramalinga Viswanathan Mangalaraja, Jorge Durango-Petro, Jonathan Usuba, Host Flies
Summary: This study assessed the viability of spray coating as a cost-effective and reliable technique for fabricating solid oxide fuel cells (SOFCs). The compatibility of materials and the variations in coating thickness and morphology were analyzed, confirming the potential of this technique.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
D. Naveena, R. Dhanabal, A. Chandra Bose
Summary: This study analyzes the properties of undoped and La doped CuO thin films and finds that 6 wt% of La doped CuO thin films exhibit high optical absorption and low resistivity, making them suitable as absorber material for solid state solar cells.
Article
Physics, Condensed Matter
N. Chidhambaram, S. Senthil Kumari, W. Nirmala, S. Gobalakrishnan, T. Arun, R. Udayabhaskar, Mauricio J. Morel
Summary: This study presents an insightful investigation on the integrative impact of tin and graphene on the physical features of ZnO-Sn@Graphene nanopowders. The results demonstrate that the in situ synthesis strategy restricts the growth of nanoparticles on graphene sheets, resulting in dispersed semiconductor nanoparticles. Additionally, the amalgamation of ZnO-Sn with graphene significantly reduces the optical bandgap value and enhances the efficiency of photogenerated charge carriers separation and photoluminescence quenching.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Chemistry, Analytical
S. Devendiran, A. Kalai Priya, D. Sastikumar
Summary: The newly proposed fiber optic gas sensor shows excellent gas sensitivity and selectivity, particularly towards acetone gas. Different gas concentrations exhibit distinct characteristics in terms of output light intensity in various modes. The sensor demonstrates a significantly higher sensitivity in evanescent mode compared to transmission mode.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Spectroscopy
T. Pandiyarajan, R. Mangalaraja, B. Karthikeyan, R. Udayabhaskar, David Contreras, Selene Sepulveda-Guzman, M. A. Gracia-Pinilla
Summary: Rare earth doped ZnO nanostructures were prepared via wet chemical precipitation, showing morphological transitions and unique characteristics. XRD measurements revealed highly crystalline nature and no alteration in crystal structure by RE doping, while Raman spectra exhibited energy shifts and intensity variations. The enhanced photocatalytic activity and different decolorization efficiencies of MB were observed in RE doped ZnO compared to bare ZnO.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Energy & Fuels
Biny R. Wiston, Praveena Prabhakaran, M. Ashok
Summary: Attaining high specific energy and detaining the specific power achieved is a significant challenge in modern era supercapacitors. This study proposes a method of incorporating conductive iron (Fe) species with nickel hydroxide matrix to form a LDH structure, solving the challenge. The optimal composition exhibits excellent specific capacity and cycling performance, and is successfully applied in a symmetric supercapacitor, achieving high specific energy and specific power.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Materials Science, Multidisciplinary
Krishnamoorthy Shanmugaraj, Ramalinga Viswanathan Mangalaraja, Cristian H. Campos, Dinesh Pratap Singh, R. Udayabhaskar, Santiago Bedoya, Radhamanohar Aepuru
Summary: This work reports the synthesis of PtNPs-TiO2NTs catalyst, which exhibits high catalytic efficiency and operational stability in the reduction of AZB dye.
Review
Chemistry, Multidisciplinary
M. R. Ashwin Kishore, Sungwoo Lee, Jong Suk Yoo
Summary: Electrochemical conversion of methane to energy-dense liquid derivatives like methanol and ethanol is crucial for maximizing the use of natural gas. This work focuses on recent advancements in methane oxidation to alcohols. Mechanistic requirements for high methanol selectivity and limitations of using water as the oxidant are discussed. A theoretical perspective of utilizing carbonate ions is presented to overcome these limitations.
Article
Physics, Multidisciplinary
P. Vipin, R. Sankaranarayanan
Summary: The dynamics of a Brownian particle in Morse potential under thermal fluctuations is investigated by numerically integrating the corresponding Langevin equation. The dependence of Kramer's rate on temperature and viscosity of the medium is studied by mean first passage time. An approximate analytical expression for the rate constant is found and it shows a temperature dependent pre-factor for the Arrhenius equation. Numerical simulations are consistent with the analytical approximations.
PRAMANA-JOURNAL OF PHYSICS
(2023)
Proceedings Paper
Materials Science, Multidisciplinary
Devika Mahesh, John Paul, M. C. Santhosh Kumar
Summary: This study investigates the photocatalytic activity of ZnO seed layers and 1D nanorods on Methylene Blue dye. ZnO thin films are used as seed layers to grow 1D nanorods, and their structural properties are characterized. The photoluminescence spectra show a broad emission in the visible region, and the photocatalytic experiment demonstrates that nanorods exhibit better activity compared to the seed layers.
MATERIALS TODAY-PROCEEDINGS
(2022)
Proceedings Paper
Materials Science, Multidisciplinary
S. Mohamed Manjoor Shaib Maricar, D. Sastikumar, P. Reddy Vanga, M. Ashok
Summary: In this study, molybdenum trioxide (MoO3) with long micro sheets morphology was synthesized using clad-modified fiber optic gas sensor technique, and their gas sensing characteristics were characterized. The results showed that the synthesized material exhibited good gas response to methanol at room temperature. The gas sensing mechanism was also discussed.
MATERIALS TODAY-PROCEEDINGS
(2022)
Proceedings Paper
Materials Science, Multidisciplinary
E. P. Shuaib, Gaurav Kumar Yogesh, D. Sastikumar
Summary: In this study, amorphous and crystalline SiC nanoparticles were successfully synthesized in water and ethanol through laser ablation, and their properties and photoluminescence characteristics were revealed through spectroscopic analysis.
MATERIALS TODAY-PROCEEDINGS
(2022)
