Article
Optics
S. Atasoz, M. Topaksu, G. Souadi, N. Can
Summary: In this study, the TL characteristics and trapping parameters of pelletized Gd-incorporated ZnB2O4 synthesized through the gel combustion method were investigated. The XRD results confirmed the chemical composition of the obtained Gd-incorporated ZnB2O4. It was found that the optimal doping concentration of Gd was 0.25 mass%, which resulted in the highest luminous efficiency. The glow curves of the pellet-formed samples exposed to beta-irradiation showed distinct peaks at specific temperatures. The TL glow peaks were studied using various methods, revealing complex glow curves composed of six distinguishable peaks. The results suggest that ZnB2O4:Gd3+ phosphor is a suitable option for radiation dosimetry in environmental monitoring.
JOURNAL OF LUMINESCENCE
(2022)
Article
Optics
K. Bulcar, M. Oglakci, A. Yucel, S. Sezer, O. Madkhali, T. Depci, M. Topaksu, N. Can
Summary: Hydroxyapatite (HAP) served as the host material and was synthesized using sonochemical method. The study investigated the effect of Dy3+ ion doping concentrations on the structure and thermoluminescence of HAP. The TL properties, including dose response, repeatability, and heating rate, of Dy3+ doped HAP were also studied. The results showed the presence of three effective peak maxima in the glow curves at around 84, 190, and 318 degrees C, while four levels of activation energy were observed by Tm-Tstop analysis. The dose dependence of the glow curves was found to be linear across the 0.1-20 Gy range.
JOURNAL OF LUMINESCENCE
(2023)
Article
Chemistry, Inorganic & Nuclear
Y. Alajlani, M. Sonsuz, A. Barad, Uemit H. Kaynar, M. Ayvacikli, M. Topaksu, N. Can
Summary: The current study focuses on the production of GdAl3(BO3)4 (GAB) phosphors using gel combustion and investigates their structural and thermoluminescent (TL) features. The GAB phosphors were found to crystallize in a rhombohedral crystal system. The TL experimental data exhibited an unusual heating rate behavior, which was explained by the semi-localized transition model. The findings suggest that GAB is a potential candidate for radiotherapy dose measurement.
APPLIED RADIATION AND ISOTOPES
(2023)
Article
Chemistry, Physical
G. Souadi, Umit H. Kaynar, M. Sonsuz, S. Akca-Ozalp, M. Ayvacikli, M. Topaksu, O. T. Ozmen, N. Can
Summary: The thermoluminescence properties of GAB samples doped with different concentrations of Sm3+ were studied. Two TL glow peaks were observed, with the intensity of one peak increasing with a faster heating rate. By calculating the activation energies and conducting dose-response experiments, the potential of this material for radiation dosimetry applications was demonstrated.
RADIATION PHYSICS AND CHEMISTRY
(2023)
Article
Chemistry, Physical
S. Sarikci, M. Topaksu, M. Bakr, N. Can
Summary: In this study, SrGd2O4: xSm(3+) (x = 0%, 0.5%, 1%, 2%, 3%, 4%, and 5%) phosphors were synthesized using the solid state reaction method. XRD measurements confirmed the orthorhombic structure of the synthesized compounds. The sample doped with 0.5% Sm exhibited the highest integrated thermoluminescence intensity. Various methods were employed to analyze the thermoluminescence glow curve and determine its peak number, trap structure, and kinetic parameters.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
Ziyafer Gizem Portakal-Ucar, Sibel Akca-Ozalp, Mehmet Oglakci, Aya Barad, Mustafa Topaksu
Summary: The thermoluminescence properties and kinetics of beta-irradiated porcelain used as an electrical insulator were extensively studied in this work. The trap system in the material was slightly altered after thermal annealing at 1100°C, while heating above 500°C increased the visual TL intensity. Various characterization techniques confirmed the structural, morphological, and chemical properties of the porcelain. The TL glow curve characteristics, repeatability, storage time properties, and dose-response behavior were thoroughly investigated. The results showed that the porcelain exhibited excellent reusability within the confidence interval and demonstrated linear response in the dose range of 0.1-3 Gy.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Abeer S. Altowyan, M. Sonsuz, Umit H. Kaynar, Jabir Hakami, M. Ayvacikli, M. Topaksu, N. Can
Summary: The ZnGa2O4 phosphor material was synthesized using the gel combustion method and its structural characteristics were studied. Thermoluminescence measurements were conducted and the depth and frequency factors of electron traps were determined. The phosphors showed potential as effective thermoluminescence dosimeters.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Inorganic & Nuclear
J. Hakami, M. Sonsuz, U. H. Kaynar, M. Ayvacikli, M. Oglakci, M. Yueksel, M. Topaksu, N. Can
Summary: In this study, the CBYO phosphor was successfully synthesized using a gel combustion method, and XRD measurement confirmed its single-phase structure. TL measurements revealed significant glow peaks at different beta doses, showing good linearity in the range of 0.1-100 Gy. Multiple methods were used to determine the number of peaks, the trap structure, and the kinetic parameters of the CBYO phosphor. The findings suggest that CBYO is a promising material for environmental studies due to its adequate TL dose response, sensitivity, and linearity.
APPLIED RADIATION AND ISOTOPES
(2022)
Article
Engineering, Electrical & Electronic
Kensei Ichiba, Yuma Takebuchi, Hiromi Kimura, Takumi Kato, Daisuke Nakauchi, Noriaki Kawaguchi, Takayuki Yanagida
Summary: Ce-doped Mg2SiO4 single crystals demonstrated good performance in photoluminescence and thermally-stimulated luminescence, with emission peaks attributed to Ce3+ and defect centers. The samples showed different luminescence characteristics under various excitation and heating conditions, with linear proportional responses observed.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Ceramics
Abeer S. Altowyan, Umit H. Kaynar, K. Bulcar, M. Oglakci, Z. G. Portakal-Ucar, Jabir Hakami, M. Topaksu, N. Can
Summary: This study focused on investigating the thermoluminescence characteristics of YAl3(BO3)(4) (YAB) phosphors modified with different contents of Sm3+ ions. The study found three thermoluminescence peaks at 70, 235, and 408 degrees C for YAB: Sm3+ phosphors. The results showed that the sample could be successfully used for thermoluminescence dosimetry applications.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Electrical & Electronic
Kensei Ichiba, Yuma Takebuchi, Hiromi Kimura, Takumi Kato, Daisuke Nakauchi, Noriaki Kawaguchi, Takayuki Yanagida
Summary: In this study, Tb-doped Mg2SiO4 single crystals were grown using the floating zone method, and their photoluminescence, scintillation, and thermally stimulated luminescence properties were evaluated. The results showed that the single crystals exhibited multiple emission peaks and high sensitivity in dose measurements.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Optics
Tansir Ahamad, Zeid A. ALOthman, Mu. Naushad, Kareem Yusuf
Summary: In this study, lithium magnesium borate glasses doped with different Cu2+ contents were fabricated using the melt quench technique, showing an enhancement in TL intensity with the addition of a certain amount of Cu2+. The fabricated nanocomposites exhibited excellent TL intensity, reproducibility, and good linearity with linear regression coefficients indicating potential for personal, environmental, and medical radiation therapy applications.
Article
Optics
Ramadhin, Jagjeet K. Saluja, Ravi Shrivastava, Vikas Dubey
Summary: In this study, Yttrium Zirconate Y2Zr2O7: Gd(3 +) doped phosphors were successfully produced using the solid state reaction technique. The synthesized phosphors showed good thermoluminecsence properties and are suitable for dosimetric applications.
Article
Optics
J. Hakami, M. Oglakci, Z. G. Portakal-Ucar, M. Sonsuz, U. H. Kaynar, M. Ayvacikli, M. Topaksu, N. Can
Summary: In this study, samarium doped Ca3Y2B4O12 samples were synthesized via the combustion method, and their thermoluminescence characteristics were investigated. The samples exhibited different behaviors at various concentrations, showing great potential for high temperature dosimetric materials.
JOURNAL OF LUMINESCENCE
(2022)
Article
Materials Science, Multidisciplinary
Ramandeep Kaur, R. B. Rakesh, Sachin G. Mhatre, Vijeta Bhatia, Dinesh Kumar, Harpreet Singh, Supreet Pal Singh, Ashok Kumar
Summary: Trivalent neodymium ion activated glasses were synthesized and studied for their structural, physical, optical, and thermoluminescence properties. One sample was identified as a potential candidate for radiation dosimetry based on its linear dose response curve.
Article
Optics
G. Souadi, U. H. Kaynar, M. Ayvacikli, A. Canimoglu, N. Can
Summary: Undoped BaSiF6, Dy3+ doped BaSiF6, and Dy3+, Li+ co-doped BaSiF6 phosphors were synthesized via a gelcombustion method and characterized using various techniques including XRD, FTIR, EDS, and PL. The results indicated that co-doping with Li+ can enhance the photoluminescence intensity of BaSiF6:Dy3+, with the optimal Li+ concentration found to be 8%.
JOURNAL OF LUMINESCENCE
(2022)
Article
Chemistry, Inorganic & Nuclear
G. Souadi, S. Akca-Ozalp, E. Ekdal Karali, U. H. Kaynar, M. Ayvacikli, M. Topaksu, N. Can
Summary: BaSiF6 phosphor was synthesized using a gel combustion method, with a crystalline size of 54.17 +/- 4.36 nm. TL glow peaks of BaSiF6 phosphors were observed around 84, 190, and 322 degrees C. The study suggests that the luminescence process in the material may follow second order kinetics.
APPLIED RADIATION AND ISOTOPES
(2022)
Article
Optics
S. Atasoz, M. Topaksu, G. Souadi, N. Can
Summary: In this study, the TL characteristics and trapping parameters of pelletized Gd-incorporated ZnB2O4 synthesized through the gel combustion method were investigated. The XRD results confirmed the chemical composition of the obtained Gd-incorporated ZnB2O4. It was found that the optimal doping concentration of Gd was 0.25 mass%, which resulted in the highest luminous efficiency. The glow curves of the pellet-formed samples exposed to beta-irradiation showed distinct peaks at specific temperatures. The TL glow peaks were studied using various methods, revealing complex glow curves composed of six distinguishable peaks. The results suggest that ZnB2O4:Gd3+ phosphor is a suitable option for radiation dosimetry in environmental monitoring.
JOURNAL OF LUMINESCENCE
(2022)
Article
Chemistry, Physical
G. Souadi, U. H. Kaynar, M. Oglakci, M. Sonsuz, M. Ayvacikli, M. Topaksu, A. Canimoglu, N. Can
Summary: In this study, lithium molybdate phosphor was synthesized by a gel combustion method and its thermoluminescence properties were investigated. The kinetic parameters of the phosphor were determined using various methods, and the results showed that it has potential applications in dosimetry, particularly in clinical dose monitoring.
RADIATION PHYSICS AND CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
J. Hakami, M. Sonsuz, U. H. Kaynar, M. Ayvacikli, M. Oglakci, M. Yueksel, M. Topaksu, N. Can
Summary: In this study, the CBYO phosphor was successfully synthesized using a gel combustion method, and XRD measurement confirmed its single-phase structure. TL measurements revealed significant glow peaks at different beta doses, showing good linearity in the range of 0.1-100 Gy. Multiple methods were used to determine the number of peaks, the trap structure, and the kinetic parameters of the CBYO phosphor. The findings suggest that CBYO is a promising material for environmental studies due to its adequate TL dose response, sensitivity, and linearity.
APPLIED RADIATION AND ISOTOPES
(2022)
Article
Chemistry, Inorganic & Nuclear
Aziza H. Qaisi, U. H. Kaynar, M. Ayvacikli, J. Garcia-Guinea, Y. Alajlani, M. Topaksu, N. Can
Summary: This study reports the luminescent properties of undoped and Dy3+ doped borate through CL and PL under electron beam and laser excitation. The concentration quenching phenomenon at 1 mol% doping concentration is discussed.
APPLIED RADIATION AND ISOTOPES
(2022)
Article
Materials Science, Ceramics
G. Souadi, M. Oglakci, U. H. Kaynar, V. Correcher, J. F. Benavente, K. Bulcar, M. Ayvacikli, A. Hiziroglu, M. Topaksu, N. Can, E. Ekdal Karali
Summary: In this study, LiMoO4:xEu ceramic phosphors with different Eu doping concentrations were successfully synthesized using a gel combustion method. The optimum doping concentration was determined based on thermoluminescence intensity and XRD measurements. The dose-response was evaluated at different doses, and the thermoluminescence characteristics of Eu-doped Li2MoO4 were studied using various methods.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
J. Hakami, Umit H. Kaynar, M. Ayvacikli, M. B. Coban, J. Garcia-Guinea, P. D. Townsend, M. Oglakci, N. Can
Summary: A series of Tb3+-doped Y1-xAl3(BO3)4 phosphors were synthesized and characterized in this study. The synthesized phosphors exhibited good crystallinity and crystal structure, and showed a green main emission peak at 543 nm under excitation. The photoluminescence intensity of the phosphors increased with increasing Tb3+ ion concentration up to a certain threshold, and then exhibited concentration quenching. Moreover, the study found the activation energies for thermal quenching at different wavelengths.
CERAMICS INTERNATIONAL
(2022)
Article
Instruments & Instrumentation
J. Hakami, M. Sonsuz, U. H. Kaynar, M. Ayvacikli, M. Oglakci, M. Topaksu, N. Can
Summary: This study investigates the thermoluminescence characteristics of Ca3Y2B4O12:xDy phosphor samples. The concentration of Dy3+ was optimized at 1% for the best TL signal quality. The TL glow curve consists of three peaks, and the trapping parameters were calculated using IR and VHR techniques.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2022)
Article
Materials Science, Ceramics
Umit H. Kaynar, M. B. Coban, A. Y. Madkhli, M. Ayvacikli, N. Can
Summary: SrSnO3 doped with Dy3+ ions at different concentrations (1, 2, 3, and 5 wt %) were synthesized using a hydrothermal reaction and characterized using various techniques. The XRD analysis confirmed the cubic perovskite-type structure of SrSnO3. The PL emission spectrum of Dy3+-activated samples showed characteristic peaks corresponding to different transition wavelengths. The intensity of the PL emission increased with increasing doping concentration up to 3 wt % and then decreased due to concentration quenching. The PL emission spectra also exhibited anomalies at 270 K, consistent with a structural phase transition in SrSnO3.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Inorganic & Nuclear
G. Souadi, K. Bulcar, Umit H. Kaynar, M. Ayvacikli, M. Topaksu, S. Cam-Kaynar, N. Can
Summary: By utilizing thermoluminescence (TL), we have conducted a comprehensive investigation on YAl3(BO3)4 host matrices doped with different concentrations of Tb3+, which were prepared through combustion. The TL glow curves, measured under beta ray exposure at varying doses, exhibited four broad peaks located at approximately 76, 126, 230, and 378 degrees Celsius. After 5 Gy beta irradiation, the peak maximum of the 230 degrees Celsius peak shifted towards higher temperatures, while the peak maxima of the other peaks remained almost constant. It is interesting to note that the shift of the 230 degrees Celsius peak towards higher temperatures with increased radiation dose can be attributed to the multi-phase nature of the sample. Additionally, the TL glow curve displayed a proportional increase in intensity with an increase in the heating rate. Possible causes for this pattern were discussed. The observed peaks using the TmTstop method were a result of the presence of a quasi-continuous distribution of traps. The trap parameters were also estimated using various heating rate methods, which displayed excellent agreement with one another.
APPLIED RADIATION AND ISOTOPES
(2023)
Article
Chemistry, Physical
Umit H. Kaynar, M. Oglakci, K. Bulcar, S. Benourdja, M. Bakr, M. Ayvacikli, A. Canimoglu, M. Topaksu, N. Can
Summary: In this study, the undoped and Eu3+-doped YAl3(BO3)(4) phosphors were synthesized by a combustion process and characterized using XRD and TL techniques. The XRD analysis confirmed the crystallized structure of the synthesized phosphors. TL measurements showed that the undoped sample exhibited three glow peaks at 80 degrees C, 240 degrees C, and 360 degrees C, while the Eu3+-doped sample showed peaks at 90 degrees C, 230 degrees C, and 390 degrees C. The TL intensity and kinetics were investigated, and the results indicated a non-linear behavior in the Eu3+-doped sample.
RADIATION PHYSICS AND CHEMISTRY
(2023)
Article
Materials Science, Ceramics
M. Oglakci, Z. G. Portakal-Ucar, S. Akca-Ozalp, V. Correcher, J. F. Benavente, M. Sonsuz, N. Can, Y. Z. Halefoglu, M. Topaksu
Summary: Ce3+ doped LaB3O6 phosphors were synthesized using the combustion method, and characterized by X-ray diffraction patterns and TL glow curves. The results showed that LaB3O6:Ce3+ (1%) had a feasible dose response linearity and stable dose peak intensity.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
O. Madkhali, Umit H. Kaynar, S. Cam Kaynar, M. Ayvacikli, N. Can
Summary: The synthesis of GdAl3(BO3)4 phosphors doped with Dy3+ and Dy3+/Eu3+ activators was successfully achieved through the gel combustion method. The effects of dopant concentration on crystallographic structure were identified using Powder X-ray diffraction (XRD). Photo-luminescence (PL) measurements revealed that the luminescence properties varied depending on the concentrations of Dy3+ and Eu3+ ions. The energy transfer process between Eu3+ and Dy3+ ions was investigated, and the co-doping of Eu3+ significantly improved the energy transfer efficiency.
MATERIALS RESEARCH BULLETIN
(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)
