Article
Materials Science, Multidisciplinary
S. Nelson Amirtharaj, M. Mariappan
Summary: In this study, Mn2O3 nanorods were successfully synthesized and demonstrated superior supercapacitor behavior and stability, showing potential applications as electrode materials for supercapacitor devices.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Acoustics
Song Hanxuan, Ye Yan, Zheng Weiru, Essouma Essouma Ariane Felicite Bibiche, Zhang Qingwen, Guo Jixiang
Summary: In this study, a magnetic material Nano-beta-CD@Fe3O4 was prepared by hydrothermal method and surface modification method. Nano-beta-CD@Fe3O4 can be intelligently enriched at the oil-water interface and oil-solid interface, and it can be stably dispersed to form nanofluid under the action of ultrasound. The experimental results showed that the best treatment effect for oily sludge was achieved when the concentration of Nano-beta-CD@Fe3O4 was 0.5%, the ultrasonic frequency was 60 Hz, and the temperature was 60℃.
ULTRASONICS SONOCHEMISTRY
(2023)
Article
Chemistry, Physical
M. Sertkol, Y. Slimani, M. A. Almessiere, H. Sozeri, R. Jermy, A. Manikandan, S. E. Shirsath, A. UI-Hamid, A. Baykal
Summary: In this study, MnZn spinel nanoferrites were successfully fabricated via ultrasonic irradiation. The structural and morphological analysis were investigated using various instruments. The results showed that the prepared SNFs exhibited superparamagnetic and ferrimagnetic behavior. The saturation magnetization reached the maximum value at an Er and Dy co-doping concentration of 0.04 and decreased with further co-doping concentrations.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Materials Science, Multidisciplinary
Fenghao Zhang, Yahui Yan, Song Chen, Yajia Bai, Xiaona Li, Weiyi Chen, Aili Wei
Summary: In this study, chitosan/hydroxyapatite/Fe3O4 microspheres were synthesized using the water/oil emulsion technique. These microspheres exhibited excellent photothermal antibacterial properties and have the potential to be used as antibacterial biomaterials in biomedical applications.
Article
Chemistry, Inorganic & Nuclear
Mingbang Wei, Ping Zhang, Bowen Zhang, Le Zhao
Summary: The magnetic reusable Fe3O4/C composites derived from cornstalk and ferric nitrate through hydrothermal method exhibit good reusability and adsorption performance. The hydrothermal temperature has an effect on the magnetic property, adsorption performance, and reusability of the composites.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Wen-Xin Liu, Wei-Na Zhou, Shuang Song, Yong-Gang Zhao, Yin Lu
Summary: A new type of magnetic nanomaterial, consisting of Fe3O4 as core and organic polymer as shell, was synthesized using seed emulsion polymerization. This material exhibits improved mechanical strength of the organic polymer and prevents the oxidation and agglomeration of Fe3O4. Solvothermal method was employed to prepare Fe3O4 with desired particle size. The effects of reaction time, solvent amount, pH value, and polyethylene glycol (PEG) on the particle size of Fe3O4 were investigated. The obtained C18-functionalized magnetic nanomaterials were used for preparing the chromatographic column, achieving efficient and selective elution.
Article
Materials Science, Multidisciplinary
Huan-Yan Xu, Yan Xu, Si-Qun Zhang, Li-Yuan Dai, Yuan Wang
Summary: Heterogeneous Fenton-like reactions in the confined space of a nanoreactor showed higher efficiency than those in bulk solution. In this study, a Fenton-like nanoreactor was designed by selectively filling Fe3O4 nanoparticles into the lumen of halloysite. Experimental results demonstrated that this nanoreactor could significantly accelerate the degradation of 50 mg/L methyl orange in the presence of H2O2. .OH and O-1(2) were identified as the main reactive radicals. A space confinement mechanism was proposed to explain the enhanced Fenton-like efficiency and radicals formation pathways.
Article
Materials Science, Ceramics
S. A. Hassanzadeh-Tabrizi, Hamid Norbakhsh, Reza Pournajaf, Morteza Tayebi
Summary: The study developed cobalt ferrite/hydroxyapatite nanocomposite with uniform core-shell structure, showing great drug loading capability and potential for magnetic hyperthermia treatment. The incorporation of hydroxyapatite increased cell compatibility while reducing magnetization saturation, making the composite promising for medical applications.
CERAMICS INTERNATIONAL
(2021)
Article
Multidisciplinary Sciences
Rawan M. A. Mahmoud, Fatma N. Sayed, Mohamed R. Shehata, Ahmed M. A. El Naggar, Gehad G. Mohamed, Ahmad M. Abdelaal, Asmaa S. Morshedy
Summary: Metal oxides nanoparticles heterogeneous photocatalysts prepared by coprecipitation and ultrasonic techniques were used for diesel desulfurization. The catalysts were characterized and compared, with catalyst B showing higher reactivity due to its larger surface area and higher crystallinity. The maximum sulfur removal was achieved through optimized operational parameters and a further solvent extraction step.
SCIENTIFIC REPORTS
(2023)
Article
Green & Sustainable Science & Technology
Olawale Oloye, Joseph F. S. Fernando, Dmitri Golberg, Anthony P. O'Mullane
Summary: The preparation of GaZn/GaZnO catalyst by alloying process shows excellent photocatalytic degradation efficiency towards methyl orange. The catalyst achieves a high degradation efficiency of 73% under solar simulated conditions, attributed to the GaZn core acting as an electron sink allowing for effective charge carrier separation, production of reactive oxygen species.
ADVANCED SUSTAINABLE SYSTEMS
(2022)
Article
Materials Science, Multidisciplinary
Yu-Cai Wu, Xi -Chun Zhong, Yuan-Xin Li, Xuan Huang, Jiao-Hong Huang, Cui-Lan Liu, Zhong-Wu Liu, Wan-Qi Qiu, Ming -Long Zhong, Zhen-Chen Zhong, R. V. Ramanujan
Summary: LaFe11.8Si1.2/16wt%La65Co35 samples were prepared by spark plasma sintering (SPS) and subsequent annealing. The La65Co35 binder increased the 1:13 phase content, and the alpha-Fe phase formed and disappeared during annealing. The sample annealed for 0.5 h showed a distinct core-shell structure, desirable table-like (-Delta S-M) -T curve, and higher RC value. The diffusion of Co was hindered by the growth of La5Si3 phase. Samples annealed for 24 h achieved larger (-Delta S-M)(max) and (sigma(bc))(max) values. The method combining SPS and diffusion annealing is promising for preparing La-Fe-Si based magnetocaloric composites with good properties.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Energy & Fuels
Liuyi Hu, Zhihang Lu, Fei Chen, Jun Zhang, Yang Xia, Wenkui Zhang, Yongping Gan, Xinping He, Wenlong Song, Hui Huang
Summary: A facile method for the synthesis of Si/Fe3O4/C composites by ball-milling in scCO(2) medium is proposed in this paper. The diffusion characteristics, low viscosity, and mass transfer properties of scCO(2) are utilized. Under scCO(2) infiltration, MCMB is exfoliated into graphite flakes and achieves good interfacial fusion with silicon and Prussian blue. The introduction of Fe3O4 enhances the lithium-storage capacity, cycling stability, and rate performance of Si/C anodes significantly.
Article
Chemistry, Multidisciplinary
Trung Tuyen Bui, Duc Cuong Nguyen, Si Hiep Hua, Hyungphil Chun, Yong Shin Kim
Summary: This study presents a novel method for synthesizing magnetic core-shell nanocomposites for environmental applications. The method involves encapsulating magnetic Fe3O4 nanoparticles with microporous zeolitic imidazolate framework-8 (ZIF-8) nanocrystals through ultrasonic activation. The synthesized Fe3O4@ZIF-8 nanoparticles exhibit a core-shell structure and have high content of ZIF-8, combined with micro/mesoporosity. The functional nanomaterial can be used as adsorbents that are easily separated using a magnet, and show excellent adsorption performance for the removal of copper ions from water.
Article
Chemistry, Physical
Xinlu Zheng, Weiwei Zhang, Jinlong Zhang, Lingzhi Wang
Summary: The yolk-shell Fe3O4@void@CeO2 exhibited high SERS sensitivity with an enhanced factor of 1.1 x 10(4) using methylene blue as the analyte model. The enhanced light-scattering ability of the YS structure and improved molecule adsorption benefitting from the more exposed surface played vital roles in the high SERS activity. Additionally, the composite could be conveniently recycled through magnetic separation and light irradiation due to the photocatalytic degradation of MB molecules by CeO2.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Jianwei Jing, Huan Liu, Xiaodong Wang
Summary: A novel type of multifunctional phase-change microcapsule was designed for waste heat recovery and wastewater treatment. The microcapsule was synthesized using n-docosane as a core, SiO2/Fe3O4 composite as a base shell, and Fe3O4 nanoparticle as a Pickering emulsion stabilizer. BiOI nanosheets were deposited on the surface of the SiO2/Fe3O4 composite shell to promote photocatalysis for degrading organic contaminants in wastewater. The microcapsules showed improved separability and recyclability due to the magnetic response of the Fe3O4 nanoparticles.
Article
Chemistry, Physical
Xun Zhao, Lei Mao, Qihui Cheng, Fangfang Liao, Guiyuan Yang, Lingyun Chen
Summary: This study prepared new materials for high-performance Zn2+ storage and converted them into high-capacity AZIB cathodes using an in situ electrochemical oxidation strategy, achieving high specific capacity and stable cycling performance. Additionally, the Zn2+/H+ co-intercalation mechanism was verified, providing new insights for the design of future aqueous zinc-ion batteries.
Article
Chemistry, Physical
Lei Mao, Xun Zhao, Yang Li, Lingyun Chen
Summary: Transition metal carbonate hydroxides are promising candidates for electrode materials in supercapattery. Tailoring the chemical compositions and nanostructures can lead to high-performance electrode materials that meet the demand for electrical energy storage devices.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Feiyang Zhan, Shude Liu, Qingqing He, Xun Zhao, Huayu Wang, Minsu Han, Yusuke Yamauchi, Lingyun Chen
Summary: This article critically summarizes the research progress of metal-organic framework (MOF)-derived heteroatom-doped nanoarchitectures for electrochemical energy storage (EES) since 2014. It discusses the applications, structure-performance relationships, and existing issues of heteroatom-doped metal compound and carbon nanoarchitectures in supercapacitors, alkali-ion batteries, lithium-sulfur batteries, and zinc-air batteries. The article also highlights representative design strategies and presents the challenges and prospects of MOF-derived heteroatom-doped nanoarchitectures for EES.
ENERGY STORAGE MATERIALS
(2022)
Article
Chemistry, Physical
Huayu Wang, Qingqing He, Feiyang Zhan, Lingyun Chen
Summary: In this study, three-dimensional vertical nanosheet arrays of NiFeCo LDH were designed, showing excellent electrochemical properties for applications in high-performance batteries and supercapacitors. The material exhibited high specific capacity, good cycling stability, and outstanding coulombic efficiency, as demonstrated by electrochemical tests.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Review
Chemistry, Physical
Haoyu Wang, Xuehua Ren, Jun Chen, Weili Xu, Qingqing He, Huayu Wang, Feiyang Zhan, Lingyun Chen
Summary: With the increasing energy demands and the popularity of green transportation and grid storage, oxyhydroxide (MOOH) materials have attracted attention for their unique electronic structures, variable valence states, and ultra-high energy storage capacity. Nanostructure design, defect engineering, and composite engineering present new avenues to overcome the limitations of MOOH. The modification and applicability of MOOH materials for various energy storage needs warrant further exploration.
JOURNAL OF POWER SOURCES
(2023)
Review
Chemistry, Multidisciplinary
Xuehua Ren, Haoyu Wang, Jun Chen, Weili Xu, Qingqing He, Huayu Wang, Feiyang Zhan, Shaowei Chen, Lingyun Chen
Summary: This article summarizes the recent advances in emerging 2D copper-based materials, including their synthesis methods, innovative strategies for improving electrochemical performance, and state-of-the-art applications in electrochemical energy storage and conversion. The article also discusses the charge storage mechanisms of these materials.
Article
Chemistry, Physical
Weili Xu, Xun Zhao, Feiyang Zhan, Qingqing He, Huayu Wang, Jun Chen, Haoyu Wang, Xuehua Ren, Lingyun Chen
Summary: Two-dimensional (2D) Ni-based materials have attracted significant attention due to their unique properties, and there has been increasing research interest in developing advanced 2D Ni-based nanomaterials for electrochemical energy storage (EES). This review focuses on the recent advances in 2D Ni-based materials, including design strategies for improving their electrochemical performances and their applications in EES devices such as supercapacitors and ion batteries. The review also discusses the charge storage mechanisms of 2D Ni-based materials and presents the current challenges and future research outlook.
ENERGY STORAGE MATERIALS
(2022)
Review
Engineering, Environmental
Mengcheng Wu, Xi Hu, Wanying Zheng, Lingyun Chen, Qichun Zhang
Summary: Metal-ion capacitors (MICs) are considered as highly prospective next-generation energy storage technologies. Porous carbon nanosheets (PCNs) offer great opportunities for high-performance MICs. This review systematically and critically overviewed the recent advances of PCNs in MICs, focusing on synthetic methods, energy storage mechanism, structure-activity relationship, device characteristics, and future trends.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Engineering, Environmental
Wanying Zheng, Xi Hu, Mengcheng Wu, Lingyun Chen, Shaowei Chen
Summary: The aggravation of energy and environmental issues has led to the development of sustainable energy storage technologies. Among them, emerging ammonium-ion storage is considered a promising competitor due to its plentiful resources, inherent safety, fast diffusion capability, and unique storage mechanism. However, the development of NH4-ion storage devices is still in its early stage, and finding suitable electrode materials is crucial for high-performance devices. This article provides a comprehensive review on recent advances of electrode materials for NH4-ion storage devices and introduces various NH4-ion storage devices, such as ammonium-ion batteries, supercapacitors, capacitors, dual-ion batteries, and hybrid batteries. It concludes with perspectives on future developments in order to facilitate their large-scale energy storage applications.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Chemistry, Multidisciplinary
Qingqing He, Jie Bai, Huayu Wang, Shude Liu, Seong Chan Jun, Yusuke Yamauchi, Lingyun Chen
Summary: Metal-organic frameworks (MOFs) can be customized through modular assembly for various applications. However, their limited stability and porosity restrict their popularity. This review focuses on the synthetic evolution mechanism and precise control of pore structure, size, and morphology of MOF-based nanoarchitectures by hierarchical assembly. It also presents possible solutions to address challenges associated with heterogeneous interfaces and proposes potential opportunities for innovative applications.
Article
Chemistry, Physical
Mengda Xue, Jie Bai, Mengcheng Wu, Qingqing He, Qichun Zhang, Lingyun Chen
Summary: This review provides a systematic outline of recent progresses in carbon-assisted anodes and cathodes for AZIBs. The powerful roles of carbon materials as substrates, encapsulants, and additives are highlighted, showcasing their potential in improving the cycle life of AZIBs.
ENERGY STORAGE MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Guiyuan Yang, Qihui Cheng, Fangfang Liao, Lei Mao, Xun Zhao, Lingyun Chen
Summary: In this study, 2D porous CeO2@Co3O4 sheet-like heterostructures assembled by 3D nanoflake array were synthesized using a simple hydrothermal method. These composite sheets exhibited unique structures, high surface area, and superior electrochemical performance in supercapacitors.
DALTON TRANSACTIONS
(2022)
Review
Chemistry, Physical
Jun Chen, Weili Xu, Haoyu Wang, Xuehua Ren, Feiyang Zhan, Qingqing He, Huayu Wang, Lingyun Chen
Summary: This review provides a comprehensive overview of the application of 2D nanostructured Mn-based materials in electrochemical energy storage. It introduces different categories of Mn-based materials and summarizes their structures and applications, as well as recent advances in synthesis strategies and energy storage mechanisms. The relationship between 2D nanostructure and electrochemical properties is discussed, focusing on their applications in supercapacitors, alkali-ion batteries, and multivalent metal-ion batteries. Strategies to overcome the challenges of energy storage using 2D nanostructured Mn-based materials are also presented, along with insights for future development in this research direction.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Review
Chemistry, Physical
Xi Hu, Wanying Zheng, Mengcheng Wu, Qingqing He, Feiyang Zhan, Lingyun Chen
Summary: Ternary layered double hydroxides (LDHs) have attracted significant attention due to their low price and environmental friendliness. The synergistic effect of different metal ions in ternary LDHs and their composites with other materials result in high specific capacitance/capacity, excellent cycle life, and high energy density. This review provides an overview of the crystal structure and preparation of ternary LDHs, focusing on their morphology, structural engineering, derivatives and composites, and their applications in electrochemical energy storage (EES). Additionally, the challenges in using ternary LDHs as cathode materials for supercapacitors and various batteries are discussed, along with the charge storage mechanisms studied using advanced characterization methods.
SUSTAINABLE ENERGY & FUELS
(2022)
Article
Chemistry, Multidisciplinary
Xun Zhao, Lei Mao, Qihui Cheng, Fangfang Liao, Guiyuan Yang, Lingyun Chen
Summary: A novel polyanion-type sodium vanadyl fluorophosphate has been prepared for aqueous hybrid sodium-zinc batteries using a facile solvothermal method. The cathode material exhibits superior electrochemical performance, including high specific capacity, good rate capability, and high capacity retention.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
