Article
Materials Science, Ceramics
Hanen Dhibi, Omar Rejaiba, J. Khelifi, M. Nasri, Omayma Amorri, Kamel Khirouni, Mohamed Lamjed Bouazizi
Summary: In this report, a new polycrystalline spinel-type chromite Ni0.7Cd0.3Cr2O4 (NCCO) was successfully synthesized using the sol-gel process. The sample was characterized using X-Ray diffraction (XRD), DRS spectroscopy, and dielectric measurements. The XRD analysis confirmed that the sample was well crystallized. The optical analysis showed an indirect band gap energy of approximately 1.64 eV. The dielectric measurements demonstrated semiconducting behavior and confirmed the NSPT model. The sample also exhibited dielectric relaxation and the transport mechanism was governed by the effect of grain boundaries. These findings suggest that NCCO may be a promising material for optoelectronics devices.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Physics, Condensed Matter
Fakher Hcini, Sobhi Hcini, Mohamed Amine Wederni, Bandar Alzahrani, Hussein Al Robei, Kamel Khirouni, Sadok Zemni, Mohamed Lamjed Bouazizi
Summary: The study investigated the structural, optical, and dielectric properties of the Mg0.6Cu0.2Ni0.2Cr2O4 chromite sample prepared by sol-gel process. The synthesized chromite showed a lower direct band gap energy and appropriate absorption rate in the visible light region, with conduction process described using NSPT and CBH models. The behavior of dielectric constants was interpreted based on Maxwell-Wagner's theory of interfacial polarization.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Materials Science, Ceramics
Alexander Gordeev, Svetlana Kuznetsova, Ekaterina Lyutova, Olga Khalipova, Dmitriy Fedorishin, Lilia Selyunina, Alexandra Malchik
Summary: Cerium dioxide sols, widely used in various fields, can be prepared without separating the oxide from the solution. The stabilizer, PVA, plays a key role in forming weakly aggregated CeO2 nanoparticles. The prepared sol exhibits antioxidant properties and can form a calcium-phosphate layer.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Preeti Yadav, Arushi Pandey, Bushra Khan, Rutam Biswal, Abu Fahad, Pushpendra Kumar, Manoj K. Singh
Summary: NdFeO3 (NFO) synthesized using sol-gel citrate method has an orthorhombic crystal structure and exhibits significant magneto-dielectric effect, making it a suitable choice for memory-based electronic devices in optoelectronic applications.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Bin Wu, Hongwei Wu, Yifan Gong, Anze Li, Xiaoyong Jia, Liangliang Zhu
Summary: An enantiomeric pair of luminescent gelators designed with hexathiobenzene and glutamic acid derivatives exhibit aggregation-induced emission (AIE), room-temperature phosphorescence (RTP), and circularly polarized luminescence (CPL). These optical properties can be switched on and off by thermal stimuli.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Physical
T. Rafique, M. Atif, Atta Ur Rehman, H. Wahab, W. Khalid, Z. Ali, M. Nadeem
Summary: Zinc substituted manganese ferrites were synthesized using the citrate sol-gel route, and their structure, stoichiometry, and properties were analyzed. The results showed that zinc substitution led to samples with excellent resistive and dielectric properties, making it suitable for radar absorbing applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
Hari Narayanan Vasavan, Manish Badole, Sushmita Dwivedi, Sunil Kumar
Summary: This work investigates the structural, electrical, and electrochemical properties of P2-type Na0.70Ni0.20Cu0.15Mn0.65O2 as a cathode material for Na-ion batteries. The study confirms the formation of a single P2-type phase and the dominant conduction mechanism of Na-ions. The material exhibits good cyclability and high specific capacity, making it a promising candidate for Na-ion battery applications.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Aref Omri, E. Dhahri, B. F. O. Costa, M. A. Valente
Summary: A systematic study of the structural, electrical, and dielectric properties of NiFeCoO4 nanoparticles synthesized via sol-gel technique has been presented in this article. The analysis includes X-ray diffraction, Raman spectroscopy, dielectric measurements, and complex impedance analysis. The electrical properties and dielectric parameters show significant dependence on temperature and frequency, with one semicircular arc in complex impedance plots representing grains and grain boundaries contributions.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Physical
N. H. Alonizan
Summary: Pure and Al-doped ZnO nanoparticles were synthesized using hydrothermal technique. The structural and phase analysis showed that Al doping increased the crystallite size and caused compressive stress formation in the material network. Other studies investigated the impact of different Al doping ratios on powder morphology, optical bandgap, and electronic defects localized in the material band-gap.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
J. Mera, O. Moran
Summary: Nanocrystalline ZnO films were prepared and their structural and electrical properties were studied using X-ray diffraction and impedance spectroscopy.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Electrochemistry
Y. Al-Douri, A. F. Abd El-Rehim
Summary: The VO2 thin film was deposited on a glass substrate using the spin-coating technique, with tungsten doped as an acidic solution to the vanadium precursor. The study investigated the energy gap and optical properties of the film with and without tungsten doping, showing significant differences in optical transmissions with tungsten doping. Empirical models of refractive index and optical dielectric constant were also explored in the research.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2021)
Article
Chemistry, Inorganic & Nuclear
Habib Chenaina, Charfeddine Messaadi, Jalila Jalali, Hatem Ezzaouia
Summary: This study focuses on sol-gel derived SnO2-TiO2 thin films deposited on silicon wafer type Si (100) substrate using spin coating technique, followed by heat treatments at four different temperatures. XRD characterization reveals the formation of nano-crystalline phase at 400 degrees C and further crystallization with increasing annealing temperature. Optical and dielectric properties analysis demonstrates universal many body response over a broad frequency range, presenting variations in structure and performance of the films.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Energy & Fuels
Joelle C. W. Mah, Isyraf Aznam, Andanastuti Muchtar, Mahendra Rao Somalu, Jarot Raharjo
Summary: This study investigated the influence of citric acid on the structure, morphology, and electrical properties of sol-gel derived (Cu,Mn,Co)(3)O-4 (CMC) spinel powders. Dual-phase CMC spinel powders consisting of cubic CuMnCoO and tetragonal Mn2CoO4 were successfully synthesized at citrate-to-nitrate (CA/MN) ratios of 0.8, 1.0, and 1.2. The CA/MN ratio not only affected the phase formation of CMC spinel, but also influenced the particle size distributions. The CA/MN ratio of 1.0 resulted in the finest CMC spinel with the least agglomerates and the highest electrical conductivity of 116 Scm(-1). Therefore, a CA/MN ratio of 1.0 was recommended for the synthesis of CMC spinel for the fabrication of protective coatings in solid oxide fuel cell interconnects.
Article
Engineering, Electrical & Electronic
P. Vidhya, K. Shanmugasundaram, P. Thirunavukkarasu, T. Govindaraj, V. Balasubramani, B. Yogeswari, M. Karuppusamy
Summary: In this study, p-PbS/n-Si photodiodes were successfully fabricated using the jet nebulizer spray pyrolysis technique. The effect of substrate temperature on the properties of PbS thin films was investigated. X-ray Diffraction (XRD) confirmed the crystal structure of the films, while Field Emission Transmission Microscopy (FESEM) revealed changes in morphology with increasing temperature. The UV-Vis absorption spectrum showed an increase in bandgap with deposition temperature. The fabricated p-PbS/n-Si diode exhibited excellent rectification and photovoltaic properties.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Crystallography
Reem Khalid Alharbi, Noura Kouki, Abdulrahman Mallah, Lotfi Beji, Haja Tar, Azizah Algreiby, Abrar S. S. Alnafisah, Sobhi Hcini
Summary: This study synthesizes Cd0.5Zn0.5Fe2-xCrxO4 nanoparticles using the sol-gel method and characterizes their morphological, structural, infrared, and magnetic properties comprehensively. The formation of the spinel structure is confirmed by X-ray diffraction, and cation distribution is estimated through X-ray analysis and magnetization measurements. The size and lattice parameter of the nanoparticles decrease with increasing Cr content, while saturation magnetization decreases, remanent magnetization increases, and coercivity increases as Cr ions are added. Fourier transform infrared (FTIR) spectroscopy shows absorption bands corresponding to metal-oxygen bonds in the spinel structure.
Article
Engineering, Biomedical
Ifra Sanaullah, Hera N. Khan, Amna Sajjad, Sidra Khan, Anjum N. Sabri, Shahzad Naseem, Saira Riaz
Summary: In this study, barium titanate coatings were prepared using chemical bath deposition technique, showing excellent biocompatibility and antibacterial activity for biomedical applications in tissue engineering and regeneration. Coatings prepared at different solution molarities exhibited high hardness and antibacterial capability after annealing. The weight loss of the coatings was minimal after immersion in simulated body fluid. Therefore, coatings produced without the use of hazardous solvents/reagents utilizing CBD technique are a potential material for biomedical applications.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
Article
Physics, Condensed Matter
Hadia Noor, Sadia Muniza Faraz, Muhammad Waqas Hanif, Maria Ishaq, Atia Zafar, Saira Riaz, Shahzad Naseem
Summary: Zinc sulfide nanoparticles were incorporated into unsaturated polyester resins (UPR) to form nanocomposites with improved dielectric, magnetic, and mechanical properties. X-ray diffraction confirmed the amorphous nature of the nanocomposites. Scanning electron microscopy images showed good dispersion of ZnS nanoparticles in the UPR matrix. The nanocomposites with 2.5 wt% ZnS concentration exhibited significant or improved values of dielectric constant, ac conductivity, coercivity, magnetic saturation, and magnetic remanence. At a 2 wt% ZnS concentration, the nanocomposites showed good tensile strength and Young's modulus. This study suggests that the semiconducting ZnS nanofillers in the UPR matrix have potential as electromagnetic materials with remarkable properties.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Chemistry, Physical
Muhammad Ahmed Khan, Kanwal Shahbaz, Ghulam M. Mustafa, Shahid M. Ramay, Shahzad Naseem, Shahid Atiq
Summary: Easy-to-synthesize multiferroic materials have shown impressive magnetoelectric coupling, promising for multistate memory devices. In this study, a series of tri-phase composites (0.7BiFeO3 + 0.3BaTiO3) + xMnFe2O4 were synthesized using a facile two-step method. The composition with x = 0.02 exhibited the highest recoverable energy density and efficiency.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Anwar ul Haq, Sadia Sagar Iqbal, Afaq Ahmad, Tasawer Shahzad Ahmad, Abu Bakar, Shahid M. Ramay
Summary: The opto-electronic properties and mechanical stability of A2TlBiI6 (A = Cs and Rb) were investigated using density functional theory. The results showed that these halide double perovskite materials exhibit strong structural and dynamical stability, with direct band gaps of 2.0 and 2.1 eV for Cs2TlBiI6 and Rb2TlBiI6, respectively. These materials show promising potential for use in multi-junction solar cells for renewable energy applications.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Materials Science, Multidisciplinary
Maria Khalil, Aneeqa Bashir, Eman A. Alghamdi, Abubaker A. Siddig, Shahid M. Ramay, Murtaza Saleem
Summary: Titanium oxide (TiO2) is an important semiconductor material with promising optoelectronic, thermoelectric, and photovoltaic applications. The effect of dopant on TiO2 properties was investigated using first-principles calculations and density functional theory. Thin films were fabricated using reactive magnetron sputtering, and analysis showed the formation of the rutile phase of Titania. The study revealed that oxynitrides thin films with epsilon near zero response are suitable for enhanced optoelectronic and thermoelectric applications.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Hera N. Khan, M. Imran, Ifra Sanaullah, Irfan Ullah Khan, Anjum N. Sabri, Shahzad Naseem, Saira Riaz
Summary: This study investigates the structures and magnetic properties of various iron oxide nanoparticles synthesized with different pH values using the sol-gel method. The results demonstrate the potential applications of these nanoparticles in fields such as bio-nanotechnology and spintronics.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Sidra Khalid, Saira Riaz, Aseya Akbar, Zaheer H. Shah, Zohra N. Kayani, Shahzad Naseem
Summary: The use of microwave energy instead of high temperature treatment in material synthesis is becoming popular due to its advantages in terms of speed and economy. In this study, Co-doped Fe3O4 thin films were prepared using a microwave assisted sol-gel method, and their structure, magnetization, and polarization behavior were comprehensively studied. The presence of Co ions strongly affected the magnetic and transport properties of the films. The anisotropic behavior was observed in Co-doped Fe3O4 films, with the highest saturation magnetization obtained for 6 wt% Co-doped films. Verwey transition was observed at low dopant concentration, while no sharp transition in magnetization behavior was observed at higher dopant concentration. Anomalous dielectric behavior was observed at high frequencies, and negative values of the magneto-dielectric coefficient indicated the coupling of magnetic and dielectric behavior at room temperature.
JOURNAL OF SAUDI CHEMICAL SOCIETY
(2023)
Article
Materials Science, Ceramics
Tanzeela Batool, Zaheer H. Shah, Hina Ashraf, Daoud Ali, S. Shamaila, Tehmina Anjum, Shahzad Naseem, Saira Riaz
Summary: Crop yield loss due to pathogenic infections costs billions of dollars annually. The use of antibiotics in agriculture is limited, necessitating the development of alternative protocols to combat microbial pathogens. Nanoparticles with antimicrobial properties, such as iron oxide, show potential in protecting plant/crop production and suppressing plant pathogens. This study synthesized iron oxide nanoparticles using the sol-gel method and magnetic field annealing, and demonstrated their efficacy in inhibiting bacterial growth and enhancing photocatalytic activity. In vitro and in vivo experiments also revealed improved plant growth parameters after treatment with iron oxide nanoparticles.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Physics, Multidisciplinary
Rabia Zafar, Shahzad Naseem, Saira Riaz, N. A. Noor, Asif Mahmood, Khuram Shahzad
Summary: The mechanical, optical, and thermoelectric properties of double perovskites compounds K2NaTlX6 (X = Cl, Br, I) were investigated using the DFT approach. The study explored their structural stability, optical absorption, and thermoelectric suitability.
Article
Physics, Multidisciplinary
Anwar ul Haq, Tasawer Shahzad Ahmad, Muhammad Amin, Abu Bakar, A. Afaq, Nimra Ehsan, Shahid M. Ramay, Abubaker Ahmed Siddig
Summary: In this study, the structural, elastic, and optoelectronic properties of cubic double halide perovskites A(2)AgAlI(6) (A = Na, K, Rb) were calculated and their potential application in solar panels was indicated.
Article
Chemistry, Physical
Affifa Qayyum, Muhammad Okash ur Rehman, Farooq Ahmad, Muhammad Ahmed Khan, Shahid M. Ramay, Shahid Atiq
Summary: Researchers have synthesized a series of perovskite materials with general formula La1-xNdxNiO3 (x=0,0.05,0.1,0.15) through a cost-effective sol-gel auto-combustion method, which can be used as electrode material in supercapacitors. The synthesized samples were confirmed through X-ray diffraction, and their crystal structure parameters were determined. Field emission scanning electron microscopy showed the presence of well-defined and uniformly distributed nano-spheres, nano-rods, and nano-size particles. The electrochemical analysis demonstrated that La0.85Nd0.15NiO3 exhibited the highest specific capacitance of 64.381 F/g at a scan rate of 0.01 Vs-1 through cyclic voltammetry. The galvanic charge/discharge tests showed power density and energy density values of 846.56 W/kg and 20.92 Wh/kg, respectively. This comprehensive study highlights the potential of these composite materials for supercapacitor-based applications.
SOLID STATE IONICS
(2023)
Article
Materials Science, Multidisciplinary
Mashal Akram, Muhammad Umair, Muhammad Atif Yaqub, Shahid M. Ramay, Shahzad Naseem, Shahid Atiq
Summary: With the increasing demand for eco-friendly energy, supercapacitors are becoming crucial for energy storage. This study presents LaMn1-xFexO3 composite materials prepared by the sol-gel auto-combustion route, showing improved electrochemical response and reduced charge transfer resistance.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Abdul Quader, Ghulam M. Mustafa, Shahid M. Ramay, Shahid Atiq
Summary: The defect fluorite structure with A(2)B(2)O(7) composition has great potential in modern smart electrical devices. The synthesized Nd2-2xLa2xCe2O7 series exhibits the expansion of the fluorite structure and decreased grain size with the incorporation of La. However, the exact composition without impurity elements is confirmed. The pure Nd2Ce2O7 shows the highest energy storage efficiency and other desirable features for efficient energy storage.
Article
Physics, Multidisciplinary
Muhammad Amin, Anwar Ul Haq, G. M. Mustifa, A. Afaq, Shahid M. Ramay, Abu baker Ahmed Siddig, Ramesh Sharma, Athar Hanif
Summary: This study investigates a composition of halide double perovskites with a narrow band gap, and explores their potential for energy harvesting and thermoelectric applications using first-principle methods.
Article
Materials Science, Multidisciplinary
Zohra Nazir Kayani, Ifra Sheri, Salma Waseem, Saira Riaz, Shahzad Naseem
Summary: Ba-doped TiO2 thin films were fabricated using the sol-gel dip-coated method. X-ray diffraction confirmed the formation of the anatase phase. With the increase of Ba doping, the size of the crystallite decreased. The bandgap of pure TiO2 and Ba-doped TiO2 thin films was in the range of 3.15-2.94 eV, which is beneficial for enhancing solar cell efficiency and water treatment. Ba-doped TiO2 thin films exhibited low dielectric constant suitable for high-frequency devices and showed ferromagnetism. The antibacterial activity of Ba-doped TiO2 was higher than that of pure TiO2, making it suitable for application in nanomedicine.
MATERIALS RESEARCH BULLETIN
(2024)
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)
