Article
Chemistry, Multidisciplinary
Sun-Woo Kim, Jae Chul Ro, Su-Jeong Suh
Summary: Ni/Ni3C core-shell nanoparticles with an average diameter of approximately 120 nm were synthesized via a chemical solution method. It was observed that a thin Ni3C shell measuring approximately 1-4 nm formed on the surface of the nanoparticles over time, and the Ni core consisted of multiple grains. The saturation magnetization of the core-shell nanopowders decreased in proportion to the amount of Ni3C. The synthesis mechanism of the Ni/Ni3C core-shell nanoparticles was proposed based on XRD, XPS, and TEM analyses.
Article
Engineering, Environmental
Jiaxu Gong, Weige Luo, Yang Zhao, Mingzhen Xie, Jiaheng Wang, Junxiao Yang, Yatang Dai
Summary: A facile method for high-performance electrode materials for alkaline aqueous batteries is reported in this study, which shows outstanding electrochemical performance and solves the issue of low capacity of anode material in alkaline electrolytes. The mechanism of the influence of surface coating on electrode material performance is revealed. The assembled flexible battery exhibits excellent energy storage performance and potential applications.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Hongbin Sheng, Hao Qu, Biao Zeng, Yanxin Li, Chenghui Xia, Can Li, Lixin Cao, Bohua Dong
Summary: The rational design of efficient and cost-effective electrocatalysts for oxygen evolution reaction (OER) is crucial for clean energy technologies. A new approach is proposed to design electrocatalysts with abundant active sites by utilizing crystalline/amorphous heterostructure. The Fe-NiCoHPi electrocatalyst with cauliflower-like structure exhibits remarkable activity and unceasing durability, making it a promising candidate for sustainable energy devices.
Article
Engineering, Environmental
Zhengfang Tian, Kejia Zhou, Mingjiang Xie, Yan Zhang, Jian Chen, Cheng Du, Liu Wan
Summary: This study optimized the electrode structure and interface to achieve high energy density asymmetric supercapacitors, utilizing a core-shell heterostructure based on crystalline nickel iron selenide and amorphous nickel cobalt boride, which showed excellent performance.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Nanoscience & Nanotechnology
Qiaodan Wu, Tong Guo, Zhenhua Wu, Kangsheng Shi, Xingke Yang, Ziqiang She, Ruiya Zhao, Yunjun Ruan
Summary: In this study, NiCo2S4 hollow dodecahedra@nitrogen-doped carbon core/shell nanostructures were synthesized to mitigate the shuttle effect and volume changes in lithium-sulfur batteries. The NiCo2S4 hollow dodecahedra promoted fast polysulfide conversion, while the N-doped carbon shell prevented structural collapse. The NiCo2S4@NC cathode exhibited improved performance and stability, delivering a high specific capacity and capacity retention after cycling.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Environmental
Jie Li, Zhuobiao Ni, Qiongzhi Gao, Xixian Yang, Yueping Fang, Rongliang Qiu, Mingshan Zhu, Shengsen Zhang
Summary: In this study, a core-shell structured cobalt-nickel bimetallic sulfide NiCo2S4/Co9S8/NiS was synthesized and used as a peroxymonosulfate (PMS) activator to efficiently degrade glyphosate. The effects of different reaction conditions on glyphosate degradation were investigated, and the intermediates and degradation pathways were analyzed. This work provides new insights into catalysts for the degradation of glyphosate.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Analytical
A. L. Yan, W. D. Wang, B. Q. Wang, X. C. Wang, J. P. Cheng
Summary: In this study, a new electrode material was designed and fabricated by depositing core-shell structured Co3O4@NiCo2O4 nanowire hybrid films on nickel foam. The hybrid film exhibited higher specific capacitance and smaller resistance, indicating great potential for energy storage.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Physical
Liu Wan, Tao Jiang, Yan Zhang, Jian Chen, Mingjiang Xie, Cheng Du
Summary: Sluggish kinetics and poor structural stability are two main obstacles in the exploration of transition metal selenides (TMSs) for supercapacitors. In this study, a core-shell cobalt iron selenide (CoFe2Se4) @ cobalt nickel carbonate hydroxide (CoNi-CH) heterostructure was directly fabricated on carbon cloth. The heterostructure combines the highly conductive CoFe2Se4 for rapid electron transfer and the highly electroactive CoNi-CH for multiple redox reactions. The CoFe2Se4@CoNi-CH electrode exhibits increased specific capacity and enhanced rate capability compared to pure CoFe2Se4 and CoNi-CH. Furthermore, a hybrid supercapacitor utilizing the CoFe2Se4@CoNi-CH cathode and porous carbon anode achieves a high energy density and excellent durability.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Xingxing Jiang, Kang Liu, Qiang Li, Min Liu, Minghui Yang, Xiang Chen
Summary: The study focused on the peroxidase-like activity of B-doped core-shell Fe@BC nanozymes, finding that the BCO2 site has a lower activation energy barrier, with a positive correlation between density and activity. The enzyme-like and positively charged properties of the core-shell Fe@BC help improve the production and utilization of OH for efficiently killing bacteria.
CHEMICAL COMMUNICATIONS
(2021)
Article
Engineering, Environmental
Rakesh Saroha, Jang Hyeok Oh, Jae Seob Lee, Yun Chan Kang, Sang Mun Jeong, Dong-Won Kang, Chungyeon Cho, Jung Sang Cho
Summary: The hierarchically porous nanofibers with multiple core-shell Co3O4@graphitic carbon nanoparticles grafted within N-doped carbon nanotubes were designed as functional interlayers for improved Li-S batteries. The combination of N-CNTs, GC layer, and polar Co3O4 nanoparticles effectively trapped polysulfides, leading to excellent electrochemical performance in terms of high-rate capability and stable cycling performance.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Wasim Ullah Khan, Ahmed Al Shoaibi, Srinivasakannan Chandrasekar, Mohammad M. Hossain
Summary: Nickel and cobalt-based titania-supported bimetallic catalysts with varying metal loading were synthesized. High-loading catalysts showed higher activity and stability, with 25NCT catalyst exhibiting the highest methane conversion and carbon yield. The catalyst's enhanced activity can be attributed to its higher specific surface area and the formation of carbon nanotubes through tip-growth and base-growth mechanisms.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Neda Salarinejad, Minoo Dabiri, Siyavash Kazemi Movahed
Summary: Palladium nanoparticles have been successfully synthesized and characterized on core-double shell magnetic nitrogen-doped carbon nanotubes. These nanohybrids show excellent catalytic performance in the one-pot synthesis of imine and secondary amine.
CATALYSIS COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Min -Jae Kim, Seon Joo Park, Ki Duk Kim, Woohyun Kim, Sung Chan Nam, Kang Seok Go, Sang Goo Jeon
Summary: This study investigates the catalytic activity of CeO2-supported Co, Fe, and Ni catalysts in the catalytic decomposition of methane (CDM) for carbon nanotube (CNT) synthesis, with a focus on the effects of CeO2 on the activity of the active metals. The results show that Ni/CeO2 exhibits good catalytic performance at a relatively low temperature of 600 degrees C, and the catalysts were characterized using various analysis methods. Additionally, the morphology and properties of the carbon material grown on the catalysts were examined.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Yunfei Zhang, Yulong Li, Mengmeng Wei, Dengtao Yang, Qiuyu Zhang, Baoliang Zhang
Summary: In this study, a new lightweight one-dimensional absorber called Co@NC@MoS 2 was designed and prepared. It showed excellent microwave absorption performance and has potential applications.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Baojun Wang, Shikuo Li, Fangzhi Huang, Shipeng Wang, Hui Zhang, Fenghua Liu, Qiangchun Liu
Summary: A versatile strategy was proposed for synthesizing 1D hierarchical core-shell structure with Co-ZIF arrays derived carbon nanotubes (CNTs) coupled on cotton fiber (CF)-supported MXene shell (Co/CNTs-MXene@CF). The designed heterogeneous composites consist of interlayer MXene and CNTs, grow sequentially from the outermost Co-ZIF nanosheet arrays, and exhibit optimal reflection loss and effective absorption bandwidth for microwave absorption materials. This work provides a new design strategy for high-performance materials.
Article
Nanoscience & Nanotechnology
L. L. Vovchenko, O. V. Lozitsky, L. Y. Matzui, V. V. Oliynyk, V. V. Zagorodnii
Summary: This study investigated the microwave absorbing and shielding properties of epoxy composites with multiphase filler across a wide frequency range of electromagnetic radiation. The results showed that the content of carbon nanotubes and the thickness of the composite significantly affected the EMR shielding efficiency, especially for epoxy CMs with carbon nanotubes and carbonyl iron. Additionally, simulations demonstrated that the composition and thickness of the composite sample could manipulate the reflection loss and the effective bandwidth for EMR attenuation.
APPLIED NANOSCIENCE
(2022)
Article
Physics, Applied
Ludmila Yu. Matzui, Oleksii A. Syvolozhskyi, Ludmila L. Vovchenko, Olena S. Yakovenko, Oleksandra A. Lazarenko, Tetyana A. Len, Olena V. Ischenko, Alla G. Dyachenko, Anna V. Vakaliuk, Victor V. Oliynyk, Volodymyr V. Zagorodnii
Summary: This study investigates the microstructure, electrical percolation behavior, and electromagnetic shielding efficiency of conductive polymer composites with a segregated structure and hybrid fillers. The composite materials exhibit a lower percolation threshold and higher shielding efficiency under specific conditions.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Physics, Applied
Ludmila Vovchenko, Ludmila Matzui, Olena Yakovenko, Viktor Oliynyk, Tetyana Len, Antonina Naumenko, Leonid Kulikov
Summary: This study investigates the microwave absorbing properties of epoxy composites filled with micro-sized MoS2 and carbon nanotubes (CNT)/MoS2. The results show that the addition of MoS2 reduces the permittivity of the composites, while the addition of CNTs increases both the real and imaginary parts of permittivity. The MoS2/epoxy composite and CNT/MoS2/epoxy composite exhibit excellent microwave absorption performance at different thicknesses.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Andrii Yatsymyrskyi, Alla G. Dyachenko, Elena Ischenko, Tetiana M. Zakharova, Snizhana Gaidai, Vitaliy E. Diyuk, Vladyslav V. Lisnyak
Summary: In this study, the adsorption of carbon dioxide (CO2) on a hydrogenated nickel (111) surface was investigated using density functional theory (DFT). The formation of reaction intermediates, including [HC(OH)(2)], [COOH], [HCOO], and [C(OH)(2)], was observed. The results provide insights into CO2 adsorption on nanoscale nickel metals and can guide the development of efficient gas sensing materials.
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
(2023)
Article
Chemistry, Multidisciplinary
Alla Dyachenko, Olena Ischenko, Vitaliy Diyuk, Olena Goncharuk, Mykola Borysenko, Oleksandr Mischanchuk, Tetiana Zakharova, Olha Pryhunova, Dariush Sternik, Vladyslav Lisnyak
Summary: Silica-based nanocomposites with embedded metal oxides and metallic nanoparticles were prepared and showed high efficiency in catalytic CO2 hydrogenation to methane. The metal oxide modifiers increased the contribution of mesopores to the total porosity of the nanocomposites.
RESEARCH ON CHEMICAL INTERMEDIATES
(2022)
Article
Nanoscience & Nanotechnology
L. L. Vovchenko, L. Yu Matzui, O. S. Yakovenko, O. V. Lozitsky, T. A. Len, V. V. Oliynyk, M. V. Galaburda, M. O. Borovoy, O. A. Syvolozhskyi
Summary: The electrical and microwave shielding properties of epoxy-based composites filled with metal-nanocarbon Ni-C and Co-C core-shell particles were studied. It was found that the electrical resistivity of the composites decreases with increasing Ni content and temperature. The composites with high Ni content exhibited higher microwave shielding efficiency and microwave absorption index.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Olena S. Yakovenko, Ludmila Yu. Matzui, Oleksii A. Syvolozhskyi, Ludmila L. Vovchenko, Oleksandra A. Lazarenko, Olena V. Ischenko, Alla G. Dyachenko, Anna V. Vakaliuk, Victor V. Oliynyk, Volodymyr V. Zagorodnii, Andrii V. Bodnaruk, Viktor M. Kalita, Mykola O. Borovoy
Summary: This paper investigates the structure and microwave properties of epoxy resin composites with graphite nanoplatelets decorated by FeNi nanoparticles prepared by the salt impregnation method. The results show that the decorated composites exhibit excellent conductivity and wide bandwidth absorption properties.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2022)
Article
Materials Science, Composites
Ludmila L. Vovchenko, Tetyana A. Len, Ludmila Y. Matzui, Olena S. Yakovenko, Viktor V. Oliynyk, Volodymyr V. Zagorodnii, Olena V. Ischenko
Summary: This paper presents the results of investigating the properties of epoxy composites containing silica gel globules coated with Fe oxide particles and multi-wall carbon nanotubes (CNTs). The combination of SiO2 particles, (SiO2-Fe oxide) particles, and CNTs leads to an increase in electrical conductivity and a negative temperature coefficient of electrical resistance (TCR). The addition of 2 wt.% CNT along with (SiO2-Fe oxide) filler into epoxy resin enhances the electromagnetic interference (EMI) shielding efficiency SET up to 8-12 dB in the frequency range 26-54 GHz.
APPLIED COMPOSITE MATERIALS
(2023)
Article
Instruments & Instrumentation
V. M. Kalita, Yu Dzhezherya, S. Cherepov, Yu B. Skirta, A. Bodnaruk, S. M. Ryabchenko
Summary: The critical bending deformation and magnetization of a magnetoactive elastomer (MAE) beam with a fixed end in a transverse uniform magnetic field have been studied. The symmetry of the beam shape and the symmetry of the MAE magnetic state change spontaneously after the beam reaches a critical bending. The formation of an angular magnetic state in the beam has a magnetoelastic origin and is characterized by the critical behavior of the mutually related bending and longitudinal effective magnetization of the MAE.
SMART MATERIALS AND STRUCTURES
(2023)
Article
Chemistry, Multidisciplinary
A. G. Dyachenko, O. Ischenko, M. Borysenko, S. Gaidai, A. Yatsymyrskyi, G. G. Tsapyuk, O. Pryhunova, O. O. Kostyrko
Summary: Effective catalysts for CO2 hydrogenation to methane were prepared by impregnating aluminum oxide with cobalt and iron nitrates. Characterization analysis using XRD, SEM-EDX, argon physisorption, and TPD with mass-spectroscopy revealed that increasing the amount of Co-Fe active mass in the nanocomposite catalyst composition led to higher CO2 conversion and CH4 yield.
THEORETICAL AND EXPERIMENTAL CHEMISTRY
(2022)
Article
Multidisciplinary Sciences
N. Yu Strutynska, I. I. Grynyuk, O. M. Vasyliuk, S. Prylutska, L. L. Vovchenko, I. A. Kraievska, N. S. Slobodyanik, U. Ritter, Yu Prylutskyy
Summary: Hybrid composite materials based on whitlockite-related calcium phosphate, alginate, and C-60 fullerene were fabricated, showing that the addition of alginate significantly improved compressive strength and Young's modulus, while C-60 had minimal impact. Studies on antibacterial activity revealed that composites containing C-60 exhibited strong inhibitory effects against Staphylococcus aureus.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2022)
