Article
Chemistry, Physical
Han Wang, Yujie Ma, Yanchao Shen, Cancan Zhang, Jiazhi Yang, Pingyun Li
Summary: In this study, Co3O4/N-doped carbon materials and Co-Co3O4/N-doped carbon materials were prepared using the sol-gel method. Calcination and acid-base inhibition were employed to enhance the catalytic performance of the materials. The materials prepared using ethylene glycol and glycerol exhibited excellent catalytic activity in the hydrogenation reduction reaction. Additionally, using acrylamide as the source of carbon and nitrogen resulted in highly active Co-Co3O4/NC nanocatalysts.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Teng Zheng, Marcin Runowski, Natalia Stopikowska, Malgorzata Skwierczynska, Stefan Lis, Peng Du, Laihui Luo
Summary: Optical thermometers based on Er3+/Tm3+/Yb3+-doped Bi2MoO6 materials exhibit bright color-tunable upconversion emissions and exceptional thermal sensitivity, making them promising candidates for multi-parameter temperature sensing applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
S. U. Costilla-Aguilar, M. J. Escudero, R. F. Cienfuegos-Pelaes, J. A. Aguilar-Martinez
Summary: Double perovskite La1.8Sr0.2CoFeO5+delta (DP-LSCF) exhibits excellent chemical compatibility and physical-chemical properties, making it a promising cathode material for intermediate temperature solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Francesca Cova, Alessandro Benedetto, Norberto Chiodini, Roberto Lorenzi, Anna Vedda, Vladimir Ouspenski
Summary: The study reveals the influence of fiber drawing on the mechanical and vibrational properties of RE-doped sol-gel silica, showing an increased resistance to fracture and a slight rearrangement of the silica structure. The mechanical characteristics are consistent with those of Corning 7980 reference glass.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Chemistry, Physical
David Tetour, Tomas Paska, Veronika Makova, Barbora Nikendey Holubova, Jana Karpiskova, Michal Rezanka, Jiri Brus, Jana Hodacova
Summary: Two hybrid organosilica materials containing bis-cinchonine-phthalazine bridging organic unit were synthesized and used as heterogenized ligands in catalysis of enantioselective Sharpless alkene dihydroxylation. The nanostructured material exhibited higher enantioselectivities than the bulk material and could be used at least five times without loss of enantioselectivity.
JOURNAL OF CATALYSIS
(2021)
Article
Materials Science, Multidisciplinary
V. Vallejo-Otero, N. Crespo-Monteiro, A. Valour, C. Donnet, S. Reynaud, N. Ollier, M. F. Blanc Mignon, J. P. Chatelon, Y. Bleu, E. Gamet, Y. Jourlin
Summary: The authors present an innovative and rapid process for producing ZrN thin films using a photo-structurable ZrO2 sol-gel and a rapid thermal nitridation (RTN) process. Compared to traditional methods, the sol-gel method allows for the production of ZrN thin films on non-planar and large substrates in a shorter time and at a lower cost. The produced ZrN films were characterized and their optical, electrical, and tribological properties were investigated.
MATERIALS TODAY ADVANCES
(2023)
Article
Materials Science, Multidisciplinary
Bin Ma, Xianbo Hou, Yang Li
Summary: This study successfully achieved ambient drying of polyimide aerogel by adding hydrophobic SiO2 nanoparticles as enhancers and inhibitors. The resulting PI/SiO2 aerogel showed similar thermal insulation and mechanical properties to that prepared by supercritical drying.
Article
Materials Science, Multidisciplinary
Z. A. A. Halim, M. A. Mat Yajid, N. Ahmad
Summary: The thermal degradation of mesoporous hydrated silica (MHS), mesoporous silica (MS), and alumina trihydrate (ATH) hybrid systems for flame retardant materials was investigated. The results show that MHS-ATH has higher thermal stability and a wider range of water release temperature, improving the flame retardancy effect compared to ATH.
Article
Engineering, Chemical
R. Mithun Prakash, C. Ningaraju, K. Gayathri, Y. N. Teja, M. Aslam Manthrammel, Mohd. Shkir, S. AlFaify, M. Sakar
Summary: This paper reports a solution auto-combustion (AC) process for the rapid synthesis of Fe3O4 nanoparticles derived from the sol-gel (SG) process. By using citric acid (CA) and tartaric acid (TA) as gelling agents in the SG process, citric acid acts as a fuel that combusts the gel and yields highly magnetic crystalline Fe3O4 nanoparticles in one step. In contrast, different concentrations of citric acid and any concentrations of tartaric acid do not induce combustion and only result in amorphous iron oxides. Upon annealing, the CA and TA derived iron oxide samples transform into crystalline alpha-Fe2O3 particles. Photocatalytic studies show that the synthesized Fe3O4 nanoparticles exhibit higher photocatalytic efficiency and stability under simulated solar light irradiation.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Gen Hayase
Summary: The increasing need for outdoor remote sensing using drones and robots and reducing the urban heat island effect has created a demand for highly reflective materials suitable for outdoor use. The development of flexible macroporous silicon monoliths that exhibit high diffuse reflectance has been successful. These materials were prepared using a two-step catalyzed surfactant-free sol-gel process and demonstrated total reflectance of over 97.5% in the 400-1100nm wavelength range. The high reflectance, along with other favorable properties, makes the macroporous silicone monoliths promising for outdoor thermal management applications.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Chemistry, Physical
Natalia E. Boboriko, Yaraslau U. Dzichenka
Summary: The study utilized fast and simple molecular dynamics simulation to investigate the interaction between gas molecules and oxide surfaces, revealing that hydrogen molecules interacted most efficiently with the (001) anatase plane. The results suggest that molecular dynamics simulation can be a useful tool in understanding gas sensing properties of oxide materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
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
Chemistry, Physical
Arash Fereydoni, Sajjad Dehghani, Ali Mosahebfard
Summary: Despite its advantages, the low practical efficiency of CZTS prevents it from replacing CIGS. The poor crystallization and high porosity of CZTS thin films, which cause defect-related recombination, are the main reasons for this drawback. In this study, an organic-based sol-gel method was used to develop CZTS thin films and several parameters were optimized to improve the film quality. The findings of this study will contribute to the development of high-quality CZTS thin films for photovoltaic applications.
SURFACES AND INTERFACES
(2023)
Article
Optics
Brian Rogers, Tatsiana Mikulchyk, Mohamed Oubaha, Dervil Cody, Suzanne Martin, Izabela Naydenova
Summary: Continual improvements in holographic recording materials allow for the development of volume holographic optical elements for various applications. A water-resistant photosensitive sol-gel shows promise due to its environmental and physical robustness, but its refractive index modulation is currently limited. This research focuses on improving the refractive index modulation and photosensitivity/recording speed through various methods, such as matching the recording wavelength and layer absorption, as well as chemical alterations and thermal post-processing techniques.
Article
Chemistry, Multidisciplinary
Ali Abdullah, El Mostafa Benchafia, Daniel Choi, Sufian Abedrabbo
Summary: Erbium-doped silica films were synthesized using a two-step sol-gel methodology with acid and base catalysts. The samples with efficient emission were annealed at 800-900 degrees C and doped with 3-6% erbium. The internal structure of the films was influenced by annealing temperatures and doping concentrations. The proposed method shows promise for the synthesis of erbium-doped silica films with potential optical device applications.
Article
Engineering, Environmental
Atul Verma, Sanath Kumar, Yen-Pei Fu
Summary: The study synthesized a bi-functional hybrid material and investigated its potential applications in photocatalysis and electrochemical sensing. The 2D-ternary hybrid showed significant activity in photocatalytic degradation and promising sensing properties towards 4-nitrophenol, demonstrating its potential application in both fields.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Pandiyarajan Anand, Dhayanantha Prabu Jaihindh, Wen-Ku Chang, Yen-Pei Fu
Summary: This study focused on the synthesis of Ca-doped narrow bandgap BiFeO3 perovskite via a simple auto combustion method, demonstrating its excellent performance in oxygen evolution reactions (OER) and wastewater treatment. By doping Ca2+ into the structure, oxygen vacancies were created and the valence state of Fe3+ was modified. The material showed promising results in the photocatalytic reduction of Cr(VI) and exhibited enhanced electrochemical OER activities in both acidic and alkaline conditions.
APPLIED SURFACE SCIENCE
(2021)
Review
Chemistry, Physical
Ankita Mohanty, DhayananthaPrabu Jaihindh, Yen-Pei Fu, Satyaprasad P. Senanayak, Lukas Schmidt Mende, Ananthakumar Ramadoss
Summary: MOFs are emerging as new materials for supercapacitor applications due to their inherent porous characteristics. However, the insulating nature of pristine MOFs has hindered their usage in supercapacitors, leading to successful strategies such as hybridization with other materials or using MOFs as templates to derive metal oxides, carbon, or hydroxides.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
Lokesh Saravanan, Ranjit A. Patil, Pangihutan Gultom, Brajesh Kumar, Arumugam Manikandan, Yen-Pei Fu, Yu-Lun Chueh, Chia-Liang Cheng, Wang-Chi Yeh, Yuan-Ron Ma
Summary: In this study, carbon-shelled titanium dioxide nanowires were successfully synthesized through chemical vapor deposition, with increased oxygen vacancies observed at higher growth temperatures, resulting in enhanced visible light absorption and improved photocatalytic degradation of methylene blue dye.
Article
Chemistry, Physical
Atul Verma, Pandiyarajan Anand, Sanath Kumar, Yen-Pei Fu
Summary: A Cu-cuprous/cupric oxide-based family of catalysts was synthesized via hydrothermal technique and their effects on 4-NP conversion and HER were investigated. Through intensive characterizations, two best catalysts for each application were selected based on their performance in different mechanisms.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Subramanian Moscow, Veerappan Kavinkumar, Masilamani Sriramkumar, S. Prabath Reshmi Kalaikathir, Kandasamy Jothivenkatachalam, Yen-Pei Fu, Srinivasan Anandan
Summary: In this study, a facile microwave route was used to synthesize Tin (Sn) and Zirconium (Zr) doped BiVO4 nanomaterials, which exhibited enhanced photocatalytic and photoelectrochemical performance. Various characterization techniques were employed to evaluate the impact of metal doping on the crystal structure, optical properties, electrical properties, and photocatalytic activity. The results showed that metal doping effectively created heterostructured nanomaterials, reducing recombination processes and improving the overall performance.
Article
Chemistry, Physical
Atul Verma, Yi-An Hong, Anren Hu, Yen-Pei Fu
Summary: Optimization of Cu2O morphology using NH4OH has rarely been explored. In this study, the influence of NH4OH on Cu2O morphology was investigated, and the spherical shape was transformed into octahedron-like octaspheres. The {100} facets at the corners of the Cu2O octaspheres could be etched. The morphology variations and facet etchings were studied using FESEM images and XRD analysis, showing a peak shift in Cu2O (111). Cu2O was then hybridized with rGO and g-C3N4 to form a ternary hybrid CGR, which effectively degraded the antibiotic pollutant tetracycline.
APPLIED SURFACE SCIENCE
(2023)
Article
Environmental Sciences
Pandiyarajan Anand, Atul Verma, Yi-An Hong, Anren Hu, Dhayanantha Prabu Jaihindh, Ming-Show Wong, Yen-Pei Fu
Summary: In this study, deep eutectic solvents (DES) were used to assist the synthesis of BiOCl/BiVO4 heterostructured catalyst, which was applied in electrochemical uric acid (UA) sensor and tetracycline photocatalytic degradation. The chemical composition of the catalyst was analyzed by X-ray photo-electron spectroscopy (XPS). UV-vis spectroscopy revealed increased visible light absorption and narrowing band gap energy for BiOCl/BiVO4-TU. The morphology of the catalyst was analyzed using FE-SEM and TEM, and the increased lifetime of e -/h+ pair after heterostructure formation was confirmed by TRPL.
Article
Chemistry, Multidisciplinary
S. Kumar, P. -h. Weng, Y. -p. Fu
Summary: This study focuses on the development and characterization of a core-shell-structured CuO@Ni-MOF electrocatalyst on copper foam. The developed electrode exhibits promising properties for supercapacitors and oxygen evolution reaction. The specific capacitance and cycle ability of the CuO@Ni-MOF electrode are significantly higher than those of the pistachio-derived activated carbon (PAC) electrode. A bio-based asymmetric supercapacitor is fabricated using the CuO@Ni-MOF electrode and PAC-18 as positive and negative electrodes, respectively, showing good energy and power densities with high stability. Additionally, CuO@Ni-MOF demonstrates excellent stability and low over potential in the alkaline condition for oxygen evolution reaction.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Electrochemistry
Sanath Kumar, Yen-Pei Fu
Summary: The dual morphology of ZnCo2O4 coupled with g-C3N4 was synthesized via hydrothermal method. The electro-catalyst showed enhanced electrochemical performance for hydrogen peroxide synthesis and methanol oxidation reaction. The dual morphology exhibited more active sites and higher diffusion coefficient compared to Co3O4 and ZnCo2O4. In hydrogen peroxide synthesis, the composite electro-catalyst achieved high electron transfer number and selectivity. In methanol oxidation reaction, it showed high current density and excellent stability in alkaline-based electrolyte.
ELECTROCHIMICA ACTA
(2023)
Article
Energy & Fuels
Sanath Kumar, Yen-Pei Fu
Summary: In this study, layered double hydroxides (LDH) with Zn and Co were synthesized and coupled with polyaniline-derived porous carbon (PC). The synthesized electro-catalysts showed excellent performance in terms of specific capacitance, energy density, and operational stability. This research is of great significance for energy storage and conversion.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Nanoscience & Nanotechnology
Veerappan Kavinkumar, Atul Verma, Kandasamy Jothivenkatachalam, Yen-Pei Fu
Summary: This study presents a microwave-assisted synthesis method to develop CuO-decorated Bi3.84W0.16O6.24/Bi2WO6 dual-functional nanohybrids for electrochemical hydrogen evolution reaction (HER) and photocatalytic Cr(VI) reduction applications. The CuO1.0/biphase-BW catalyst exhibits excellent HER activity in neutral media with a low overpotential and Tafel slope. The CuO1.0/biphase-BW catalyst-coated carbon cloth also demonstrates good conductivity and electrochemical stability. The tremendous activity of the synthesized catalyst is attributed to the formation and electronic interaction of CuO with biphase Bi3.84W0.16O6.24/Bi2WO6, increasing surface-active sites and charge transfer.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
S. Kumar, P. -h. Weng, Y. -p. Fu
Summary: The focus of this study is on tuning the capacitive performance of nanostructured nickel-metal-organic framework (Ni-MOF) as a high-performance electrode material for supercapacitors. The performance enhancement is achieved by selecting a material combination that includes a metal oxide, carbonaceous, conductive polymer comprising nickel oxide/graphitic carbon nitride/polyaniline. Various characterization tools are used to confirm the properties of the tuned quaternary composite, which exhibits a battery-type storage mechanism and delivers high specific capacitance and retention ability. The fabricated supercapacitors show excellent stability and higher energy density compared to ternary-based supercapacitors.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Nanoscience & Nanotechnology
Atul Verma, Esakkinaveen Dhanaraman, Wen-Ting Chen, Yen-Pei Fu
Summary: Photocatalytic N-2 fixation is a complex reaction, which requires the design and analysis of highly efficient materials. In this study, one-pot hydrothermal Bi2WO6-BiOCl heterojunctions were synthesized by adjusting the molar ratio of tungsten and chlorine precursor. The formation of a p-n heterojunction between Bi2WO6 and BiOCl resulted in a reduction of the work function and improved catalytic performance.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Multidisciplinary
Adi Subardi, Ade Indra, Jan Setiawan, Yen-Pei Fu
Summary: The double perovskite SmBa0.8Sr0.2Co2O5+delta (SBSC82) was synthesized and evaluated as a cathode material for solid oxide fuel cells (SOFCs) operating at intermediate temperatures. The SBSC82 cathode powder was prepared using a solid-state reaction method and characterized using XRD and SEM. The oxygen content of the SBSC82 cathode was measured using a thermogravimetric analyzer. The SBSC82 oxide exhibited a perovskite-type structure with a tetragonal P4/mmm symmetry. The symmetrical cell with SDC|SBCS82|SDC configuration showed a polarization resistance (Rp) of 0.420 Ω.cm2, 0.091 Ω.cm2, and 0.041 Ω.cm2 at 650°C, 750°C, and 850°C, respectively. The single cell specimen achieved a power density of 377 mW/cm2 under humidified air/hydrogen.
INTERNATIONAL JOURNAL OF INTEGRATED ENGINEERING
(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)
