Article
Chemistry, Multidisciplinary
Hala R. Mahmoud, M. Saif, Mona A. Naghmash
Summary: In this study, M/BS@Ag core-shell nanoparticles were prepared for the first time as catalysts for the catalytic decomposition of hydrogen peroxide. The nanoparticles were synthesized in a simple two-step process, with the M/BS catalysts and Ag being coated through a thermal reduction route to form the core-shell structure, showing good catalytic activity and stability.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Chemistry, Physical
Joshua P. Smith, Kurt E. Sickafus, Claudia J. Rawn, Cordell Delzer, Ching-Fong Chen, Charles Melcher
Summary: Li-containing garnet compounds have potential as transparent ceramic dual-mode scintillators, with Li5La3Ta2O12 showing promise due to its properties. This study focused on establishing thermal processing conditions for a sol-gel method and consolidating powders to form high-density ceramics. The experiments showed the presence of two cubic Li5La3Ta2O12 garnet phases with different lattice parameters, indicating a remaining excess of Li in the ceramics.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Syed Zia Hussain Hashmi, Muhammad Khalid, Ghulam Mustafa, Muhammad Gul Bahar Ashiq, Muhammad Younas, Ahsan Quddus, Hisham S. M. Abd-Rabboh, Thamraa Alshahrani, Kiran Naz, M. Mohamed Javid
Summary: The Solution-gelation self-ignition method was used to synthesize Nickel-doped Magnesium ferrite (MgFe2O4) nanoparticles with tunable dielectric and magnetic properties. The effect of nickel on crystal structure, crystallite size, dielectric properties, and magnetic properties was investigated. Various characterization techniques were employed, including XRD, FTIR, TEM, and VSM, to analyze the structure, size, and properties of the synthesized nanoparticles. The dielectric studies suggested potential applications of the Mg1-xNix-Fe2O4 nanoparticles in microwave devices.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Physical
V Poojitha, S. Mahalakshmi, K. Santhi, S. Nithyanatham
Summary: In this study, multiferroic bismuth ferrite was prepared using the sol-gel method and its structural and optical characteristics were examined. X-ray diffraction and Fourier transform infrared analysis were used to study the structure, while field emission scanning electron microscopy was used to observe the morphology. The research found that bismuth ferrite has potential importance in applications such as high dielectric constant capacitors and hard disc components.
SURFACES AND INTERFACES
(2023)
Article
Thermodynamics
Austeja Diktanaite, Giedre Gaidamaviciene, Edvardas Kazakevicius, Algimantas Kezionis, Arturas Zalga
Summary: The newly developed aqueous sol-gel preparation technique was used to synthesize lithium lanthanum titanate, with the help of hydrochloric acid, tartaric acid, and heat treatment. The crystallization process and phase transition behavior were studied using X-ray diffraction and scanning electron microscopy, while the quality of the synthesized ceramic was confirmed through impedance spectroscopy measurements.
THERMOCHIMICA ACTA
(2022)
Article
Biochemistry & Molecular Biology
Albena Bachvarova-Nedelcheva, Stancho Yordanov, Reni Iordanova, Irina Stambolova, Angelina Stoyanova, Nelly Georgieva, Veronica Nemska
Summary: TiO2 nanopowders modified by Nd and Sm were prepared using the sol-gel technique. Samples containing Sm were amorphous up to 300 degrees C, while those with Nd preserved a mixed organic-inorganic amorphous structure at higher temperatures. Samples heated at 500 degrees Celsius showed photocatalytic activity under UV irradiation and exhibited good antimicrobial activity against E. coli K12 and B. subtilis.
Article
Materials Science, Multidisciplinary
Sukhmanbir Kaur, Vishal Kumar Chalotra, Rohit Jasrotia, Venuka Bhasin, Sanjay Suman, Swati Kumari, Sanjay Thakur, Jahangeer Ahmed, Amir Mehtab, Tokeer Ahmad, Ranjit Singh, Sachin Kumar Godara
Summary: In this study, Cr-substituted cobalt nanoferrites were successfully prepared using sol-gel auto-combustion technique, exhibiting high saturation magnetization and coercivity for applications in data recording and EMI shielding. Raman spectroscopy showed crystal straining, and antibacterial testing indicated inhibition against both gram-negative and gram-positive bacteria.
Article
Materials Science, Multidisciplinary
Anagha B. Patil, Rabi N. Panda
Summary: Nanostructured materials of CoVxFe2-xO4 (0.0 < x < 0.9) were synthesized using the sol-gel autocombustion method. The phase purity and nanocrystalline nature of the materials were confirmed by powder XRD measurements, while the morphology and microstructure were determined by FESEM technique. The crystallite sizes decreased from 30 nm to 8 nm with increasing V content, x, in CoVxFe2-xO4 materials. The lattice parameters also decreased continuously as a function of increasing V content, indicating the incorporation of vanadium in cobalt ferrite. The saturation magnetizations and coercivities of the materials showed a range of values depending on the V content and were influenced by factors such as cation distributions, size, and surface effects.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Anchal Sharma, Puneet Negi, Ruhit Jyoti Konwar, Hemaunt Kumar, Yogita Verma, Shailja, Prakash Chandra Sati, Bhargav Rajyaguru, Himanshu Dadhich, N. A. Shah, P. S. Solanki
Summary: Pure and doped derivatives of TiO2 with nitrogen and cobalt as dopants were synthesized using auto-combustion sol-gel technique. The doping effects on the structural, optical, and electrical properties were investigated. The results showed that doping can tune the band gap of TiO2, making it suitable for photocatalytic and photovoltaic applications.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
A. Dinesh, K. Kanmani Raja, Ayyar Manikandan, M. A. Almessiere, Y. Slimani, A. Baykal, Hajer Saeed Alorfi, Mahmoud Ali Hussein, Anish Khan
Summary: This paper investigates the effects of cerium (Ce) substitution on the morphological, magnetic, and structural characteristics of Mn0.5Zn0.5CexFe2-xO4 ferrite nanoparticles. The sample with Ce content of 0.3 showed higher degradation performance under visible light irradiation, suggesting its potential for high-frequency applications.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Amit Kumar, Piyush K. Patel, K. L. Yadav, Yogendra Singh, Naveen Kumar, Abdullah, G. Sharma, Satyendra Singh
Summary: The effect of grain boundary resistance (G(BR)) and grain resistance (G(R)) on the magnetoelectric coupling in multiferroic composite thick films of BiFeO3 (BFO) nanocrystalline powder and poly vinylidene-fluoride (PVDF) polymer is significant. The study shows that grain boundary resistance plays an important role in strengthening the magnetoelectric effect in the BFO-PVDF system, with the BFO50 sample demonstrating promising results for device and sensor applications.
MATERIALS RESEARCH BULLETIN
(2022)
Article
Physics, Multidisciplinary
Anamika Kem, Mohd Rehan Ansari, P. Prathap, M. Jayasimhadri, Koteswara Rao Peta
Summary: Eco-friendly stable ZnO nanoparticles were successfully synthesized using citrus limon as a chelating agent. The structural and optical properties of the nanoparticles were studied at different annealing temperatures. The results showed that the particle size increased due to agglomeration or Ostwald ripening at high temperature, and the crystallite size and bandgap also increased slightly. The emission peaks of the nanoparticles were analyzed and attributed to the near band edge emission and the transition of electrons from traps to the valence band.
Article
Engineering, Electrical & Electronic
Mekonnen Tefera Kebede, Sheela Devi, Babita Tripathi, Sunil Chauhan, Venus Dillu
Summary: In this study, Bi1-xCexFe1-xNixO3 (x = 0%, 4%, 6% and 8%) samples were synthesized using sol-gel method. The influence of Ce-Ni co-doping on the structural, vibrational, magnetic, optical and photocatalytic properties of the samples was systematically investigated. The results showed that Ce-Ni co-doping improved the ferromagnetic and photocatalytic properties of BiFeO3, and also enhanced the crystallinity of the samples.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Chemistry, Physical
Hamnesh Mahajan, Sachin Kumar Godara, A. K. Srivastava
Summary: This study synthesized MnxCo0.5-xZn0.5Fe2O4 using sol-gel auto combustion technique and characterized the samples with various techniques. It was found that the samples had nanoscale crystallite size, formed a spinel structure, and exhibited soft ferromagnetic nature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Inorganic & Nuclear
A. Quiroz, E. Chavira, R. Palomino-Merino, J. Guzman, C. Flores
Summary: This article reports the formation process of the NaSbO3 polymorphic compound obtained by sol-gel acrylamide polymerization and analyzes its thermogravimetric analysis results. The experiment shows that surface dehydration, decomposition, and denaturalization processes occur below 800 degrees Celsius, and decarbonization occurs in the organic part. Stable gel formation is achieved through the addition of additives and polymerization agents during the synthesis process.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)