Article
Nanoscience & Nanotechnology
Erbiao Min, Yifeng Ling, Linghao Zhao, Ying Xu, Li-Yin Gao, Juan Li, Jianghe Feng, Ping Zhang, Ruiheng Liu, Rong Sun
Summary: This paper proposes a NiP alloy barrier to improve the compatibility between n-type Bi2Te2.7Se0.3 and commercial Ni barrier, and systematically investigates the contact and interfacial dynamics properties. The results show that the NiP barrier has better thermal stability and can achieve high temperature difference cooling.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Yen Ngoc Nguyen, Jaehoon Park, Sung Hwa Bae, Dongyeon Kim, Khanh Quoc Dang, Injoon Son
Summary: The binary Cu-Be alloy is used as an electrode material for bendable Bi2Te3-based thermoelectric devices. Ni/Au multilayers are applied as diffusion barriers to enhance bonding strength and reduce internal resistance. The performance of the device in terms of flexibility and cooling is demonstrated and compared to a thermoelectric device for heat treatment.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Heng Zhang, Daniel T. Yimam, Sytze de Graaf, Jamo Momand, Paul A. Vermeulen, Yingfen Wei, Beatriz Noheda, Bart J. Kooi
Summary: Strain engineering has attracted significant interest as a method to control functional properties. Recent research on heterostructures based on Bi2Te3, Sb2Te3, and GeTe has shown potential for a different type of strain engineering due to long-range mutual straining. The study reveals a fast relaxation process in the mica/Bi2Te3 system and long-range strain retention in GeTe and Sb2Te3 grown on or with Bi2Te3. Immediate strain relaxation by plastic deformation was observed, ruling out an elastic model for strain relaxation.
Article
Materials Science, Multidisciplinary
Dilip Kumar Meena, Rapaka S. C. Bose, S. Vinoth, K. Annapurna, K. Ramesh
Summary: This study prepared n-type Bi2Te3 alloy using different quenching mediums and investigated the influence of melt solidification rate on its structure and thermoelectric transport properties. The moderate cooling rate of melt solidification showed the highest zT value.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Dongsheng Qian, Ziyi Ye, Libo Pan, Zhijiang Zuo, Dongwang Yang, Yonggao Yan
Summary: A new technique called CHCM was proposed for preparing Bi2Te3-based alloys, which showed improved material utilization and higher ZT value for thermoelectric devices. The method overcame the problem of easy cleavage and destruction in zone-melted Bi2Te3-based alloys.
Article
Chemistry, Multidisciplinary
Yao Li, John W. Bowers, Joseph A. Hlevyack, Meng-Kai Lin, Tai-Chang Chiang
Summary: Epitaxial thin-film heterostructures provide a platform for realizing topological surface states, and the experimental demonstration presented here confirms the formation of emergent topological states in such heterostructures. The results illustrate the rich physics of engineered composite topological systems that may be exploited for nanoscale spintronics applications.
Article
Nanoscience & Nanotechnology
Jianqiang Zhang, Ping Wei, Huiqiang Zhang, Longzhou Li, Wanting Zhu, Xiaolei Nie, Wenyu Zhao, Qingjie Zhang
Summary: Stable Ni/Bi2Te3 joints were established by arc spraying the Ni barrier layer on Bi2Te3-based alloys. Compared with traditional joints, the arc-sprayed joints showed lower contact resistivity and higher bonding strength. After aging at high temperature, the arc-sprayed joints exhibited better thermal shock tolerance with stable bonding strength and contact resistivity. This work provides an effective strategy for establishing stable joints with improved thermal stability in Bi2Te3-based thermoelectric devices.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Physics, Applied
S. Kusaka, T. T. Sasaki, K. Sumida, S. Ichinokura, S. Ideta, K. Tanaka, K. Hono, T. Hirahara
Summary: Superlattice films composed of Bi-2 bilayers and Bi2Te3 quintuple layers were fabricated by annealing pure Bi2Te3 films. Two distinct stoichiometric phases were formed, Bi1Te1 (QL-BL-QL) and Bi4Te3 (QL-BL), and the surface-state dispersion was measured to analyze the topological nature of each sample.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Sepideh Izadi, Jeong Woo Han, Sarah Salloum, Ulrike Wolff, Lauritz Schnatmann, Aswin Asaithambi, Sebastian Matschy, Heike Schloerb, Heiko Reith, Nicolas Perez, Kornelius Nielsch, Stephan Schulz, Martin Mittendorff, Gabi Schierning
Summary: By compacting 3D TI nanoparticles through hot pressing into macroscopic nanograined bulk samples, the dominance of bulk carriers in transport properties has been overcome, showcasing metallic-like electrical transport properties and weak antilocalization. These samples exhibit a dominance of surface transport at low frequencies with high mobility, demonstrating important technical applications.
Article
Chemistry, Physical
Tarachand, M. Saxena, G. S. Okram, A. Lakhani, Y. -k. Kuo, S. Tyagi, P. Behera, G. M. Bhalerao, V. Sathe, U. Deshpande
Summary: The dominant role of trioctylphosphine (TOP) in the preparation of Bi2Te3 nanorods has been demonstrated, showing improved thermoelectric properties through systematic reduction of crystallite size and control over grain boundaries.
MATERIALS TODAY ENERGY
(2021)
Article
Chemistry, Physical
Robin Guehne, Grant V. M. Williams, Shen Chong, Juergen Haase
Summary: This research demonstrates that Bi-209 nuclear magnetic resonance can be used to study the bulk band inversion and field-induced charge rotation in topological insulators, providing insights into the electronic properties of these materials.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Green & Sustainable Science & Technology
Zhuang-Hao Zheng, Xiao-Lei Shi, Dong-Wei Ao, Wei-Di Liu, Meng Li, Liang-Zhi Kou, Yue-Xing Chen, Fu Li, Meng Wei, Guang-Xing Liang, Ping Fan, Gao Qing (Max) Lu, Zhi-Gang Chen
Summary: Flexible thermoelectric materials with high performance and flexibility show potential for converting waste heat into useful electricity. The textured structure design of Bi2Te3 thin films provides high thermoelectric performance and withstands 2,000 bending tests, demonstrating excellent flexibility. A flexible device assembled from 40 pairs of thin films exhibits outstanding output power density under temperature gradient, indicating its potential application in harvesting thermal energy from the environment or human bodies.
NATURE SUSTAINABILITY
(2023)
Article
Materials Science, Multidisciplinary
Xiege Huang, Xiaobin Feng, Qi An, Ben Huang, Xiaolian Zhang, Zhongtao Lu, Guodong Li, Pengcheng Zhai, Bo Duan, G. Jeffrey Snyder, William A. Goddard, Qingjie Zhang
Summary: This study discovers that introducing stacking faults can significantly enhance the vdW Te-Te interaction during shearing of Bi2Te3, thereby increasing the shear strength of the material. This finding is of great significance for developing robust layered materials.
Article
Chemistry, Physical
V Shalini, S. Harish, J. Archana, H. Ikeda, M. Navaneethan
Summary: This study successfully synthesized Bi2Te3 nanostructures and applied them to carbon and nickel-copper fabrics to form TE legs, driving wearable thermoelectric devices. The Ni-Cu fabric coated with Bi2Te3 demonstrated higher electrical conductivity and Seebeck coefficient, resulting in higher output voltage. Analysis showed that environmental temperatures below 300K and above 293K are more suitable for energy harvesting from the human body.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Yalin Zhang, Tong Wang, Zhihe Wang, Zhongwen Xing
Summary: The superconducting property induced by the proximity effect was observed in a topological-insulator/superconductor heterostructure, and it was found that the superconducting properties depend on the thicknesses of the layers.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Energy & Fuels
Rozita Monsef, Masoud Salavati-Niasari
Summary: To meet the demand for sustainable energy development, this study focuses on the development of hydrogen storage systems using new sorbent materials. A novel composite electrode was developed and optimized to achieve superior electrochemical hydrogen storage behavior. The physicochemical properties of the composite material were analyzed to determine its structure and morphology, and its electrochemical nature was tested to evaluate its performance. The results showed that the composite material exhibited high hydrogen storage capacity and discharge efficiency.
Article
Chemistry, Physical
Movlud Valian, Ali Salehabadi, Masoud Salavati-Niasari
Summary: Solid-state hydrogen storage technologies have been developed to overcome the low volumetric energy density of hydrogen. Two nanosized mixed metal oxides (MMOs), Li2TiO3 and LaTiO3, exhibit promising electrochemical hydrogen storage performance in an alkaline medium.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Atefeh Karami, Rozita Monsef, Ibrahem Waleed, Hadeel Luay Kareem, Israa Taha Ibrahim, Masoud Salavati-Niasari
Summary: The treatment of real or synthetic industrial effluents and the study of photocatalysts have attracted a lot of attention from scientists. Among various metal oxide photocatalytic materials, narrow bandgap compounds are particularly significant for their suitable efficiency in optical applications. In this study, pristine ErVO4 was synthesized using the microwave-assisted method, with different solvents and power intensities employed for size and shape control. The properties of the samples, including phase purity, surface area, magnetic and optical features, were analyzed. Microwaves with a power of 900W and ethylene glycol solvent were found to be optimal conditions for generating uniform nanosized particles. The nanostructured ErVO4 was used as a catalyst for the decolorization of colored pollutants, showing high photocatalytic efficiency in experiments with different dye concentrations and catalyst loadings.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Farzad Namvar, Morteza Hajizadeh-Oghaz, Makarim A. Mahdi, Safaa H. Ganduh, Fereshteh Meshkani, Masoud Salavati-Niasari
Summary: The present study synthesized Ni-M-Tb/Al2O3 (M: Mg, Ca, Sr, and Ba) nanostructured catalysts with different ratios of alkali metals by the ultrasonic-assisted one-pot method. The catalytic performance was evaluated through H2-TPR analysis, and the structural properties were characterized by XRD, SEM, TEM, and BET equation. The 2Ni-5Mg-5Tb/Al2O3 catalyst exhibited the highest CO2 conversion of 75.37% and CH4 selectivity of 100% at 400 degrees C with a molar ratio of H2:CO2:3.5 for 100 hours, attributed to the unique electronic structure of Tb in combination with Mg and Ni, which minimized agglomeration according to SEM and BET results. These findings suggest that tuning the combination of alkali and rare earth elements as promoters in Ni-based catalysts could lead to novel catalysts with high CO2 conversion efficiency to CH4.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Atefeh Panahi, Rozita Monsef, Merzah Kareem Imran, Ayat Abdul Mahdi, Ali Abdul Kadhim Ruhaima, Masoud Salavati-Niasari
Summary: A study demonstrates the fabrication and characterization of TmVO4 nanostructures and TmVO4/Fe2O3 nanocomposites for effective photodecomposition of organic contaminants. The TmVO4/Fe2O3 nanocomposites show higher photocatalytic activity compared to pure TmVO4 and Fe2O3 nanoparticles. The recyclable magnetic TmVO4/Fe2O3 nanocomposites achieve 68.3% degradation efficiency of eriochrome black t (EBT) using visible light.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Samira Alinavaz, Maryam Ghiyasiyan-Arani, Masoud Salavati-Niasari
Summary: Under ultrasonic irradiation, porous Tb3Fe5O12 and Nickel Aluminum layer double hydroxide were synthesized by investigating the effect of sonication time. The complexing agent H(2)salophen was used for size controlling and growth prevention of the crystals. The nanocomposites of Tb3Fe5O12/NiAl-LDH showed higher hydrogen capacitance compared to the pure NiAl-LDH and TFO materials, indicating the spillover effect and improved electrochemical hydrogen storage performance due to the redox reaction of Fe3+/Fe2+.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Foroozan Samimi, Maryam Ghiyasiyan-Arani, Masoud Salavati-Niasari, Sarab W. Alwash
Summary: Novel electrode materials for hydrogen storage based on zinc molybdate with different compositions were synthesized and compared. Zn3Mo2O9/ZnMoO4 and Zn3Mo2O9/ZnO nano-composites showed higher hydrogen storage capacity compared to pure Zn3Mo2O9 nanostructures. After 15 cycles at a constant current of 1 mA in alkaline potassium hydroxide electrolyte, the hydrogen storage capacity of Zn3Mo2O9/ZnMoO4, Zn3Mo2O9/ZnO, and pure Zn3Mo2O9 were measured as approximately 1945, 1536, and 1450 mAhg(-1), respectively. The electrode materials based on zinc molybdate exhibited excellent hydrogen storage performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Movlud Valian, Faezeh Soofivand, Asma Khoobi, Qahtan A. Yousif, Masoud Salavati-Niasari
Summary: In this study, gadolinium titanate nanoparticles were synthesized using expired B12 vitamin vials as a capping agent and reductant. A GT/N-GQD nanocomposite was prepared by synthesizing N-GQDs in the presence of GT nanoparticles. The nanocomposite was used for the photodegradation of hydroxychloroquine sulfate and as an electrochemical sensor for its detection, showing high sensitivity and efficiency.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Farzad Namvar, Masoud Salavati-Niasari, Makarim A. Mahdi, Fereshteh Meshkani
Summary: The dispersion of nickel catalysts plays a crucial role in CO2 methanation reactions. Various fabrication methods, including ultrasonic, hydrothermal, microwave, and co-precipitation, have been used to prepare 25Ni-5Er-Al2O3 catalysts. Among them, the ultrasonic method shows the best catalytic performance in terms of methane selectivity at a temperature of 400 degrees C. The addition of Erbium promotes the dispersion of nickel on the supports and enhances the reaction due to erbium oxygen vacancies.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Mahin Baladi, Mahnaz Amiri, Parisa Mohammadi, Karrar Salih Mahdi, Zahra Golshani, Razieh Razavi, Masoud Salavati-Niasari
Summary: Nanotechnology and biomedical sciences offer opportunities for research in biology and medical applications at the molecular and cellular levels. Plant-mediated synthesis of nanoparticles using green chemistry approaches provides a cost-effective and environmentally friendly alternative to traditional methods. This study investigates the cytotoxicity and potential mechanisms of hydroxyapatite nanoparticles synthesized using lemon extract as a reducing agent in human cancer cells.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Article
Metallurgy & Metallurgical Engineering
Ali Roshani, Mazaher Ramazani, Mehdi Naderi, Hossein Jamali, Majid Tavoosi, Ehsan Mohammad Sharifi, Mohammad Reza Loghman Estarki
Summary: In this study, silicon carbide nanopowders were sintered using the spark plasma sintering method, with nano-and micro-sized alumina sintering aids at different concentrations. The resulting samples were analyzed for density, hardness, and microstructure. The samples with nano-alumina at 5 vol.% exhibited the highest density (99% of theoretical density) and hardness (31.3 GPa), while the samples with micro-alumina at 7 vol.% showed the highest density (93% of theoretical density) and hardness (20.1 GPa). The densest sample had an average grain size of 3.7 μm, determined using the linear intercept method.
INTERNATIONAL JOURNAL OF MATERIALS RESEARCH
(2023)
Review
Energy & Fuels
Ali Salehabadi, Elmuez A. Dawi, Dhay Ali Sabur, Waleed Khaild Al-Azzawi, Masoud Salavati-Niasari
Summary: With increased development and electricity generation, it is crucial to consider energy storage systems to overcome the discontinuity in renewable production. Hydrogen is an ideal energy carrier for future mobility, such as automotive applications. However, current hydrogen storage materials do not meet all requirements in terms of storage capacity and commercialization. Developing new materials with large surface area, homogeneous texture, active-conductive profiles, large oxygen vacancies, and low cost is crucial. Multiphase materials composed of these materials can meet the requirements in this field.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Materials Science, Ceramics
Arman Ghasemi, Mazaher Ramazani, Saeed Reza Bakhshi, Ali Hussein Demin Al-Khafaji, Saeed Zahabi, Mohammad Reza Loghman Estarki, Abbas Zamani
Summary: This research aims to fabricate and develop a composite brake disc made of carbon/silicon carbide. The effect of different lengths of carbon fiber on the properties of the composite discs was investigated. The results showed that the discs made with a carbon fiber length of 10 mm had the desired density, hardness, and fracture toughness, as well as a coefficient of friction suitable for airplane brake discs.
JOURNAL OF THE KOREAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Mohammad Hossein Khorasanizadeh, Rozita Monsef, Masoud Salavati-Niasari, Hasan Sh. Majdi, Waleed Khalid Al-Azzawi, Furqan S. Hashim
Summary: In this study, a type-I DyVO4/AgBr heterojunction was prepared using a simple and cost-effective co-precipitation method, exhibiting excellent performance as a photocatalyst for water treatment. The reaction temperature and molar ratios of H2Salen to dysprosium were found to significantly impact the morphology of the synthesized products. Comparative photodegradation experiments demonstrated that DyVO4/AgBr outperformed pure DyVO4 and AgBr under both UV and visible light, degrading 79.8% and 72.0% methylene blue, respectively, after 90 minutes of exposure. The kinetics study revealed that DyVO4/AgBr exhibited the highest rate constant (k = 0.0187 min-1) for photodegradation.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Mahin Baladi, Hakimeh Teymourinia, Elmuez A. Dawi, Mahnaz Amiri, Ali Ramazani, Masoud Salavati-Niasari
Summary: A new electrochemical sensor based on a glassy carbon electrode modified by TbFeO3/g-C3N4 nanocomposite has been developed. Characterization techniques including XRD, FTIR, FESEM, EDX, BET, VSM, and TEM were used to analyze the nanocomposite. The sensor demonstrated a catalytic effect against imatinib and showed excellent electrocatalytic response for detecting imatinib under optimized solution conditions. It also exhibited acceptable accuracy, reproducibility, and stability during all electrochemical tests, with analytical parameters compared to previous studies.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
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)
