Article
Chemistry, Multidisciplinary
Hiroshi Sugimoto, Tatsuki Hinamoto, Yusuke Kazuoka, Artyom Assadillayev, Soren Raza, Minoru Fujii
Summary: The optical resonances of a core-shell nanosphere with a high refractive index core have been investigated in this study. The scattering and absorption spectra of the core-shell nanosphere were analyzed, revealing a transition of the hybridization scheme around a refractive index of approximately 2. Single particle scattering spectroscopy and electron energy loss spectroscopy were used to study the resonance modes of the core-shell nanosphere, showing different hybridized modes depending on the core diameter.
Article
Chemistry, Physical
G. B. Oliveira-Filho, J. J. Atoche-Medrano, F. F. H. Aragon, J. C. Mantilla Ochoa, D. G. Pacheco-Salazar, S. W. da Silva, J. A. H. Coaquira
Summary: Core-shell structure Au@Fe3O4 nanoparticles were synthesized using a thermal decomposition method, with a core diameter of approximately 10.5 nm and a shell thickness of roughly 1.85 nm. The nanocomposite exhibited a successful coupling of Au and Fe3O4, possessing good crystal structure and magnetic response characteristics.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Analytical
Jihong Wang, Songlin Liu, Zhen Meng, Xiao Xia Han, Linjun Cai, Baofeng Xu, Rui Liu, Lina Song, Chengyan He, Ziyi Cheng, Bing Zhao
Summary: A SERS-based biosensor was developed using PVDF membranes as a flexible support for the sensitive detection of GADA and IAA in T1DM. Two types of silver-gold core-shell nanotags were synthesized and used to capture the targets, enabling highly sensitive and highly selective detection of GADA and IAA. The embedded Raman probes between silver and gold layers ensured spectral stability and reliability, and the utilization of two Raman probes allowed simultaneous and multiplexing detection of both GADA and IAA, improving the detection accuracy for T1DM.
ANALYTICAL CHEMISTRY
(2023)
Review
Chemistry, Multidisciplinary
Juan Esteban Montoya Cardona, Dounia Louaguef, Eric Gaffet, Nureddin Ashammakhi, Halima Alem
Summary: Despite some delays in clinical implementation, functionalized magnetic and photothermal nanostructures remain the most promising way to target hyperthermia treatment of cancer towards local tumor regions. The synthesis method and parameters play a crucial role in optimizing the physicochemical properties for efficient energy transduction into locally released heat. This review aims to provide the latest applications and prospects of nanomaterials for hyperthermia properties.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Multidisciplinary
Zhiwei Qiu, Yitong Xue, Jiyong Li, Yunzhi Zhang, Xinyi Liang, Congying Wen, Houjian Gong, Jingbin Zeng
Summary: Ammonia is an important component of the atmosphere with environmental balancing role, but it is also a toxic gas that can damage respiratory system and mucous membranes. Researchers have developed an optical probe for detecting ammonia concentration, showing potential for environmental monitoring applications.
CHINESE CHEMICAL LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Qi Zhang, Tian-Song Deng, Ming-Zhang Wei, Xi Chen, Zhiqun Cheng, Shiqi Li, Yi-Jie Gu
Summary: This study reported a method of symmetric and asymmetric overgrowth of Ag shell onto gold nanorods assisted by Pt pre-deposition. The Ag shell thickness and symmetry of the (AuNR-Pt)-Ag nanostructures could be tuned by changing the amounts of AgNO3 precursor.
Article
Multidisciplinary Sciences
Supachai Sompech, Pongsak Jittabut, Sukhontip Thaomola, Sasiporn Audtarat, Panadda Charee, Thananchai Dasri
Summary: The study shows that core-shell structured Ag@TiO2 nanoparticles can enhance the optical absorption activity of TiO2 in the visible spectrum, providing fundamental knowledge for future environmental and biomedical applications.
Article
Nanoscience & Nanotechnology
Varvara Athanasiou, Dimitra Stavroulaki, Foteini Arfara, Dimitrios Kampras, Ioannis Kleideris, Niki Roumelioti, Panagiota G. Fragouli, Georgios Patias, David Haddleton, Hermis Iatrou
Summary: A facile strategy for synthesizing hybrid nanoparticles with gold nanoshells that absorb NIR light was presented, allowing for fine-tuning of their optical properties. The nanoparticles showed significant temperature increase when irradiated with a low power laser, indicating their potential application in photothermal therapy.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Matthew N. Creyer, Zhicheng Jin, Maurice Retout, Wonjun Yim, Jiajing Zhou, Jesse V. Jokerst
Summary: This study investigates the optical shifts and color changes of gold-silver core-shell nanoparticles, as well as their application in enzyme concentration detection.
Article
Optics
Wenpeng Hong, Jingrui Lan, Haoran Li, Zhe Yan, Yan Li, Haifeng Jiang, Meijie Chen
Summary: This study calculated the absorption, scattering, and extinction decay channels of bimetallic core-shell nanostructures using the finite difference time domain method, and separated the energy absorbed in the core and shell to better understand the decay pathways of LSPR excited energy. Results showed that fast inter band electron transitions in shell metals are crucial for dissipating the surface electric field energy of nanoparticles efficiently. The larger imaginary part of the permittivity value of the metal shell was essential for accelerating the decay channel via the surface of the nanoparticle.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Long-Hui Lin, Jing-Yu Wang, Chao-Yu You, Ling-Hang Qiu, Jia-Sheng Lin, Fan-Li Zhang, Zhi-Lin Yang, Yue-Jiao Zhang, Xi Chen, Jian-Feng Li
Summary: Enhanced electrochemiluminescence (ECL) is achieved through the development of shell-isolated nanoparticles (SHINs) by modifying pH value and particles concentration to eliminate interference and uncover exact SPR-enhanced effect. The study investigates the distribution of hotspots and stronger enhancement by adjusting excitation intensity and ECL reaction layer thickness, leading to a 250-fold enhancement by monolayer SHINs with 10 nm shell for dopamine sensing. The platform offers new guidelines for shell preparation, interface engineering, and hotspots fabrication in ECL enhancement and analytical application.
Article
Materials Science, Multidisciplinary
Fei Hu, Ting Li, Tianbiao Sun, Yidan Liu, Dongqi Yu, Rongrong Jia, Liyi Shi, Lei Huang
Summary: This work presents a controllable, green, and facile strategy for preparing Au NRs@MnO2 core/shell nanosheets using the LSPR effect of gold nanorods. MnO2 is obtained through the reduction of KMnO4 with photoelectrons induced by the LSPR effect. Methanol is found to be significant in maintaining the shape of Au nanorods by acting as a hole scavenger, and the OER performance of the resulting Au NRs@MnO2 is notably enhanced under proper irradiation and stable after 1000 cycles.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Huiqin An, Shunyuan Xiao, Xiaohui Zhao, Lifang Cao, Ting Liu, Mengzhu Li, Bing Wang, Zhen Yin
Summary: In this study, a rational construction of the Au@Ag/C@SiO2 system with Au@Ag core-shell nanoparticles was reported for the first time, demonstrating its promising photocatalytic activity under visible light. The system exhibited broad light harvesting capabilities, electron-rich properties, and excellent reusability, making it a potential approach for designing efficient photocatalysts for organic synthesis under visible light.
CHINESE JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Jiaying Mo, Eduardo C. M. Barbosa, Simson Wu, Yiyang Li, Yuancheng Sun, Weikai Xiang, Tong Li, Shengda Pu, Alex Robertson, Tai-sing Wu, Yun-liang Soo, Tiago Alves, Pedro H. C. Camargo, Winson Kuo, Shik Chi Edman Tsang
Summary: This study demonstrates the efficient conversion of solar energy to hydrogen using a core-shell structure of silver-gold bimetallic material, showing an increase in hydrogen production rate compared to commercial Pt catalysts. The use of localized surface plasmon resonance (LSPR) in conjunction with electrochemical methods opens up a new pathway for tuning the light capture range of hydrogen evolution reaction catalysts.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Maya Chauhan, Vinod Kumar Singh
Summary: High-quality ZnO nanorods have been successfully grown on silica fibers using zinc nitrate and hexamethylene tetramine. The potential application of ZnO-coated optical fiber as a glucose concentration sensor is demonstrated. The highly oriented and well-arrayed ZnO nanorods are grown via the hydrothermal route. Instrumental analyses confirm the vertical alignment, high density, crystallinity, and purity of the ZnO nanomaterial. The transmitted output intensity of the light signal decreases with an increase in glucose concentration, with an average sensitivity of 22.4%/M in the glucose concentration range of 0-0.5 M.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Kavita Sahu, Biswarup Satpati, Satyabrata Mohapatra
Summary: Efficient CuO nanosheets were synthesized without surfactants and investigated for their morphology, crystal structure, and optical properties for photocatalytic pollutant removal. The nanosheets exhibited a monoclinic crystal structure with a band gap of 1.98 eV and a high surface area of 29.1 m²/g, demonstrating their effectiveness in removing dyes from wastewater. The growth process and photocatalytic mechanism of CuO nanosheets were thoroughly examined in this study.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Shipra Choudhary, Aditi Bisht, Biswarup Satpati, Satyabrata Mohapatra
Summary: Ce-doped ZnO nanospindles synthesized through a simple wet chemical method exhibit enhanced photocatalytic activity for the degradation of toxic pollutants under sunlight exposure. The improved performance is attributed to effective separation of photoinduced charge carriers, and the catalysts show good recyclability and stability for potential applications in environmental remediation.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Chemistry, Physical
Jamilur R. Ansari, Neelam Singh, Shadab Anwar, Satyabrata Mohapatra, Anindya Datta
Summary: The hybrid nanostructure of silver nanoparticles on 2D MoS2 nanosheets exhibited enhanced photocatalytic capability for the degradation of organic dye methylene blue under solar energy. The Schottky junction at the interface induced a shift in Fermi level, leading to efficient charge carrier separation and formation of a sink for photo-excited electrons. The degradation of methylene blue was accelerated by the quick electron transfer and generation of oxidative radicals, demonstrating the potential for water purification applications.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Physical
Shipra Choudhary, Dilruba Hasina, Mahesh Saini, Mukesh Ranjan, Satyabrata Mohapatra
Summary: ZnFe2O4-ZnO heterojunction photocatalysts were successfully fabricated using a simple co-precipitation method, showing superior photodegradation performance and stability for large-scale photocatalytic applications. The efficient sunlight utilization ability and suppression of recombination of charge carriers contribute to the improved photocatalytic performance of the ZnFe2O4-ZnO nanostructures. (C) 2021 Elsevier B.V. All rights reserved.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Rohit Kumar, Anita Sudhaik, Aftab Aslam Parwaz Khan, Pankaj Raizada, Abdullah M. Asiri, Satyabrata Mohapatra, Sourbh Thakur, Vijay Kumar Thakur, Pardeep Singh
Summary: Growing pollution and high energy demand are major challenges for humans. Water pollution caused by industrial waste and irresponsible human activities is a significant problem. Photocatalysis, utilizing solar light as an energy source, is emerging as an efficient alternative for energy and water purification. However, photocatalysts face limitations such as photocarriers recombination, low surface area, and limited light absorption. Modifications like defect modifications and heterojunctions can be employed to overcome these limitations. Among them, the Z-scheme heterojunctions are an effective way to improve the performance of photocatalysts. To further enhance their activity, a dual Z-scheme photocatalytic scheme has been developed. This review discusses different types of dual Z-schemes and their applications in water purification, as well as future research prospects.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Engineering, Electrical & Electronic
Shipra Choudhary, Aditi Bisht, Manas Kumar Dalai, Satyabrata Mohapatra
Summary: Spinel ferrite ZnFe2O4 nanostructures were synthesized as sunlight responsive photocatalysts using a co-precipitation method. The nanostructures showed superior photocatalytic activity in degrading organic pollutants due to their optimal crystallite size, narrower band gap, and improved sunlight utilization efficiency, making them potential candidates for the treatment of contaminated water.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
Kavita Sahu, Aditi Bisht, Alapan Dutta, Tapobrata Som, Satyabrata Mohapatra
Summary: Plasmonic nanocomposite thin films of Au-Cu2O-CuO were fabricated by RF magnetron co-sputtering and thoroughly analyzed by various techniques. The nanocomposite thin film showed excellent photocatalytic performance for organic pollutants degradation and significant catalytic activity for 4-NP transformation. The presence of Au nanoparticles in the Cu2O-CuO thin film improved charge separation and transport, enhancing the catalytic and photocatalytic features of the nanocomposite.
SURFACES AND INTERFACES
(2021)
Article
Materials Science, Ceramics
Shipra Choudhary, Manisha Sharma, Venkata Krishnan, Satyabrata Mohapatra
Summary: This study successfully prepared magnetically separable CoFe2O4-ZnO hybrid nanostructures and characterized their structure and morphology using various techniques. CoFe2O4-ZnO exhibited significantly enhanced photocatalytic performance compared to pristine CoFe2O4 due to its high light utilization ability and heterojunction formation that delayed charge carrier recombination. The study provides an efficient solution for sunlight-responsive magnetically separable CoFe2O4-ZnO photocatalyst in wastewater purification.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Shipra Choudhary, Aditi Bisht, Manisha Sharma, Venkata Krishnan, Satyabrata Mohapatra
Summary: Novel magnetically recyclable alpha-Fe2O3/CoFe2O4/Co3O4 ternary nanohybrids were successfully fabricated and exhibited excellent magnetic separability and enhanced photocatalytic efficiency for the decomposition of dyes.
Article
Materials Science, Ceramics
Bandita Mohapatra, Satyabrata Mohapatra, Nimisha Sharma
Summary: We present a facile method for the synthesis of Ag-ZnO nanohybrids consisting of Ag nanoparticles decorated ZnO nanobullets through bioreduction. The nanohybrids exhibit strong antibacterial action against several bacteria, and the antibacterial mechanism is attributed to the ROS-induced oxidative stress. The results from different assays confirm enhanced lipid peroxidation, significant protein leakage, and cell wall damage in bacteria treated with Ag-ZnO nanohybrids.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Bandita Mohapatra, Shipra Choudhary, Satyabrata Mohapatra, Nimisha Sharma
Summary: ZnO nanobullets, with a size of 50 nm and a hexagonal wurtzite structure, exhibit strong antibacterial activity against both Escherichia coli and Bacillus oceanisediminis. The antibacterial mechanism is attributed to ROS induced oxidative stress, lipid peroxidation, and cell membrane damage, leading to protein leakage. These findings have potential practical applications.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Shipra Choudhary, Manisha Sharma, Venkata Krishnan, Satyabrata Mohapatra
Summary: We demonstrate a facile fabrication of Ce doped ZnO nanowires with outstanding photodegradation performance by thermal decomposition route. The impact of cerium doping on structure, optical and photodegradation behavior of ZnO nanowires was investigated. The results showed that ZnO nanowires doped with 0.5% Ce exhibited excellent photodecolorization performance and high efficiency in dye removal under sunlight exposure.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Shipra Choudhary, Bandita Mohapatra, Satyabrata Mohapatra
Summary: In this study, Ag@Fe3O4 plasmonic hybrid catalysts were prepared with excellent catalytic response and good antibacterial activity. The morphology and structure of the synthesized catalysts were identified through FESEM, XRD, and Raman characterizations, confirming the formation of Ag@Fe3O4 hybrid plasmonic nanostructures. The prepared Ag@Fe3O4 hybrid nanostructures exhibited efficient catalytic activity in the reduction of 4-nitrophenol and demonstrated good antibacterial activity against Escherichia coli, showing high potential in environmental remediation.
CHEMISTRY AFRICA-A JOURNAL OF THE TUNISIAN CHEMICAL SOCIETY
(2023)
Review
Chemistry, Multidisciplinary
Abhinandan Kumar, Vatika Soni, Pardeep Singh, Aftab Aslam Parwaz Khan, Mohammed Nazim, Satyabrata Mohapatra, Vipin Saini, Pankaj Raizada, Chaudhery Mustansar Hussain, Mohamed Shaban, Hadi M. Marwani, Abdullah M. Asiri
Summary: This article systematically discusses the potential and challenges of photocatalysis in combating the spread of the COVID-19 virus. From the origin of the virus to the mechanisms of photocatalytic materials, sustainable solutions for the current pandemic and future developments are proposed and discussed.
Article
Engineering, Electrical & Electronic
Kavita Sahu, Saif A. Khan, Akhilesh Pandey, Satyabrata Mohapatra
Summary: The study focuses on the thermal annealing driven development of morphology, structure, and photocatalytic performance of Au-Cu2O-CuO nanocomposite thin film. Significant growth in size of nanostructures from 10 nm to 69 nm and band gap variation from 2.44 eV to 1.8 eV upon annealing were observed. Nanocomposite thin film annealed at 250 degrees C exhibited superior photocatalytic activity for the decomposition of organic pollutants.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
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)
