Article
Energy & Fuels
Yongzheng Guo, Kaiyue Ren, Aizhu Wei, Chun Tao, Weixing Huang, Peng Zhao, Dejian Wu
Summary: Iron powder is a promising alternative to fossil fuels in a low-carbon economy. The explosion characteristics of iron dust were studied, and adding small amounts of iron oxides can reduce the explosion severity and sensitivity of iron dust. The addition of 5% oxide has an obvious inhibition effect, and increasing the oxide concentration to 10% further increases the inerting effect. However, increasing dust concentration weakens the inhibiting effect. The MEC data determined by different methods are comparable.
Article
Chemistry, Inorganic & Nuclear
Xiaoben Zhang, Chuanchuan Jin, Shaobo Han, Peiyao Guo, Yan Zhou, Wei Liu, Wenjie Shen
Summary: The atomic structure of the Fe3O4/α-Fe2O3 interface during the phase transition from hematite to magnetite was studied. Experimental observation and HRTEM simulation identified a unique polyhedral model, where Fe3O4(111) epitaxially grows along α-Fe2O3(0001) with an aligned orientation of [112]Fe3O4 ||[112 0]α-Fe2O3. Understanding the atomic rearrangement and dynamic behavior of phase transition is important for the functionalities of iron oxides in various applications.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Josiane C. Souza, Renan A. P. Ribeiro, Leticia G. da Trindade, Regiane C. de Oliveira, Leonardo D. Costa, Marisa C. de Oliveira, Sergio R. de Lazaro, Julio R. Sambrano, Cleber R. Mendonca, Leonardo de Boni, Fenelon M. L. Pontes, Adilson J. A. de Oliveira, Edson R. Leite, Elson Longo
Summary: This study demonstrates that femtosecond laser-irradiated Fe2O3 materials containing a mixture of alpha-Fe2O3 and epsilon-Fe2O3 phases exhibit significant improvements in their photoelectrochemical, magnetic, and optical properties. The irradiated samples show increased defect density and distorted crystalline lattice compared to nonirradiated samples, leading to higher conductivity and stronger ferromagnetic behavior. Quantum mechanical calculations based on density functional theory are consistent with experimental results, elucidating changes at the molecular level and enabling the construction of diagrams illustrating nanoparticle morphologies.
Article
Green & Sustainable Science & Technology
Boris Kichatov, Alexey Korshunov, Vladimir Sudakov, Alexandr Golubkov, Dmitriy Smovzh, Salavat Sakhapov, Mikhail Skirda
Summary: Wastewater pollution with organic compounds is a serious threat to human health. Micro/nanomotors, specifically manganese-based ones, have advantages such as high catalytic activity, powerful motion, and low cost, making them a possible solution to this problem. By introducing ferromagnetic elements, the motion speed and controllability of these micro/nanomotors can be increased. The synthesis of magnetic catalytic micromotors with remarkable photocatalytic properties was demonstrated using a plasma-arc method and subsequent annealing.
ADVANCED SUSTAINABLE SYSTEMS
(2023)
Article
Environmental Sciences
Huseyin Tombuloglu, Norah Albenayyan, Yassine Slimani, Sultan Akhtar, Guzin Tombuloglu, Munirah Almessiere, Abdulhadi Baykal, Ismail Ercan, Hussein Sabit, Ayyar Manikandan
Summary: This study compared the efficacy and fate of different iron oxide nanoparticles on barley growth, revealing that gamma-Fe2O3 and Fe3O4 nanoparticles significantly improved germination rate, plant biomass, and pigmentation. While they have great potential as nanofertilizers in breeding programs, caution should be taken due to their potential unknown effects on other organisms.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Chemical
Lili Bo, Fang Nian, Lumei Pu, Ping Li, Yusen Hu, Jinhui Tong
Summary: In this study, hybrids of alpha-Fe2O3/Fe3O4 nanoparticles embedded in N doped graphitic carbon polyhedron layered arrays (FeOx/NCLA) were successfully constructed by pyrolyzing the composite precursor of NH2-MIL-101(Fe) and glycylglycine. The obtained catalysts exhibited multiple active components, synergistic heterojunction effect, high BET surface areas and conductivity, leading to significantly improved intrinsic electrocatalytic activities for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). The optimized catalyst FeOx/NCLA-1.2 showed superior performance compared to Pt/C and RuO2, and was promising for applications in water electrolysis, fuel cells and metal-air batteries.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Analytical
Tuyet Nhung Pham, Ngo Xuan Dinh, Van Manh Tien, Van Hoang Ong, Raja Das, Thi Lan Nguyen, Quang Huy Tran, Dang Thanh Tran, Dinh Lam Vu, Anh-Tuan Le
Summary: This report investigates the electrochemical behavior and electrode response of magnetic nanomaterials in various applications, and finds positive influences of external magnetic fields on the physicochemical properties of the electrolyte and the electrode. The study also calculates different kinetic parameters to verify the crucial role of material modification on electrode surface.
ANALYTICA CHIMICA ACTA
(2022)
Article
Chemistry, Multidisciplinary
You Li, Zhou Wang, Ruijiang Liu
Summary: A novel type of magnetic alpha-Fe2O3/Fe3O4 heterogeneous nanoparticles were prepared using a simple solution combustion method and characterized using various techniques. The study investigated the effects of different parameters on the composition of the nanoparticles. Results showed that the nanoparticles exhibited good biocompatibility and potential for various applications.
Article
Chemistry, Multidisciplinary
Francisco Olea de la Hoz, Eduardo Saavedra, Alejandro Pereira, Juan Escrig
Summary: In this study, we investigated the magnetic properties of Fe3O4 nanotubes with varying external radius and tube wall thickness. Through numerical analysis of hysteresis curves with external magnetic field applied along the tube axis, we found that nanotubes with an external radius of 30 nm exhibit non-monotonic coercivity behavior due to a change in magnetization reversal mechanism, which is not observed in nanotubes with an external radius of 80 nm. We also studied the dynamic susceptibility of these nanotubes and discovered that the position and number of resonance peaks can be controlled by manipulating the nanotube geometry. Overall, our findings provide valuable insights into the behavior of Fe3O4 nanotubes and their potential use in technological devices.
Article
Materials Science, Multidisciplinary
S. Silva-Martinez, C. A. Pineda-Arellano, R. Lopez-Sesenes, J. G. Gonzalez-Rodriguez, M. L. Alvarez-Benites, A. Alvarez-Gallegos
Summary: Stainless steel is an attractive and cost-effective material for anodes. The presence of iron oxides on the stainless steel surface improves electron transfer. Flame synthesis of iron oxides provides a quick and easy method to achieve this. The electrochemical responses and resistances of different stainless steel samples were evaluated, and the best performance was observed in the samples treated with flame synthesis.
BULLETIN OF MATERIALS SCIENCE
(2023)
Article
Chemistry, Inorganic & Nuclear
Taixu Hao, Hengdi Ye, Yingjie He, Jinchao Wei, Qian Li, Bo Dai, Jiahui Wu, Bentao Yang, Zhang Lin, Liyuan Chai, Qingwei Wang, Xu Yan
Summary: This research proposes a new strategy of using magnetic iron instead of magnetite precipitation in zinc hydrometallurgy. Through the preparation of Fe3O4 samples with different oxidation degrees and the measurement of their magnetic properties, it is found that oxidation does not worsen iron removal and the decrease in magnetic properties can be recovered by controlling the oxidation degree. Raman and Fourier transform infrared spectrometer measurements reveal the mechanism by which oxidation affects the magnetic properties.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Physics, Condensed Matter
Ibtessam Alotaibi, Marzook S. Alshammari, Saja Algessair, N. Madkhali, N. Abdel All, M. Hjiri, Sharif Abu Alrub, L. El Mir, O. M. Lemine
Summary: This study successfully prepared Gd-doped γ-Fe2O3 nanoparticles using sol-gel technique and investigated their excellent performance in magnetic hyperthermia applications, showing high heating efficiency and short heating times. The nanoparticles exhibited high crystallinity and superparamagnetic behavior, making them promising candidates for hyperthermia applications.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Nuclear Science & Technology
Aleksandr Tsybanev, Kristof Gladinez, Jun Lim, Alessandro Marino, Nele Moelans, Alexander Aerts
Summary: It is crucial to have a comprehensive understanding of the coolant chemistry in liquid lead-bismuth eutectic (LBE) to ensure the reliability of LBE technology. This study has identified the presence of hematite (Fe2O3) as an important oxide in LBE, in addition to the previously confirmed magnetite (Fe3O4). The formation of Fe2O3 through the reaction of Fe3O4 with dissolved oxygen explains the observed oxygen trends. This finding highlights the importance of considering additional oxygen consumption in LBE cooling strategies.
PROGRESS IN NUCLEAR ENERGY
(2023)
Article
Energy & Fuels
Yanxin Yang, Yu Qiu, Zhenwu Zhang, Sheng Wang, Hui Chen, Dewang Zeng, Rui Xiao
Summary: Chemical looping methane steam reforming using Ni-promoted Fe2O3/Al2O3 catalysts showed high CH4 conversion, H2 yield, and low carbon deposition due to the facilitation of CH4 activation and enhancement of Fe2O3 reduction by Ni. The synergistic effect between Ni and Fe2O3 can lead to the development of highly active and stable oxygen carriers.
Review
Physics, Multidisciplinary
A. G. Roca, J. F. Lopez-Barbera, A. Lafuente, F. Ozel, E. Fantechi, J. Muro-Cruces, M. Hemadi, B. Sepulveda, J. Nogues
Summary: Nanotherapies, particularly photothermal therapy using iron oxide nanoparticles, have gained increasing interest in cancer treatment due to their high efficacy and reduced side effects. The photothermal performance of iron oxide nanoparticles varies depending on the light wavelength and physiochemical properties. Fe3O4 nanoparticles tend to perform better than gamma-Fe2O3 counterparts, especially in the second biological window. FeO, which has not been explored in photothermal therapy, shows promising absorption properties. Furthermore, the enhanced properties of iron oxide nanoparticles in the second spectral window have potential applications beyond cancer treatment.
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
(2023)
Article
Materials Science, Ceramics
Aleksandr Sivkov, Yuliya Vympina, Alexander Ivashutenko, Iliyas Rakhmatullin, Yuliya Shanenkova, Dmitriy Nikitin, Ivan Shanenkov
Summary: This study proposes a method to obtain highly defect structures of titanium dioxide through a high-energy plasma dynamic synthesis method. By optimizing the synthesis conditions, including the process energy and parameters of the gaseous medium, titanium dioxide powders with a tunable ratio of rutile and anatase modifications and a particle size distribution were synthesized. The resulting titanium dioxide powder has a reduced band gap and an extended working absorption spectrum region. The possibility of photocatalytic applications for the synthesized powder was demonstrated.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Coatings & Films
D. V. Feoktistov, G. V. Kuznetsov, A. A. Sivkov, A. S. Ivashutenko, D. S. Nikitin, I. I. Shanenkov, A. M. Abdelmagid, E. G. Orlova
Summary: This study investigates the surface modification of silicon carbide (SiC) ceramics using different methods and examines the effect of sintering temperature on its properties. The best wetting performance was achieved through polishing and nanosecond laser texturing to enhance hydrophilicity, while a combination of polishing, nanosecond laser texturing, and magnetron chromium sputtering resulted in hydrophobicity.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Chemistry, Physical
V Zadorozhnyy, I Tomilin, E. Berdonosova, C. Gammer, M. Zadorozhnyy, I Savvotin, I Shchetinin, M. Zheleznyi, A. Novikov, A. Bazlov, M. Serov, G. Milovzorov, A. Korol, H. Kato, J. Eckert, S. Kaloshkin, S. Klyamkin
Summary: A thermodynamic model was proposed to assess the feasibility of synthesizing single-phase multiprincipal-component alloy. Single-phase TiVZrNbTa equiatomic alloys were obtained using different methods, and their characterization and hydrogenation behavior were studied.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Physics, Condensed Matter
A. A. Sivkov, Yu N. Vympina, I. A. Rahkmatullin, A. S. Ivashutenko, Yu L. Shanenkova, I. I. Shanenkov, D. S. Nikitin
Summary: Experiments on plasma dynamic synthesis of ultradispersed titanium dioxide powders using differential pressure separation show that controlling particle size distribution is possible. The method involves transferring a finely dispersed fraction from the main chamber to the buffer chamber by opening a bypass valve due to pressure difference. This method allows fraction separation and obtaining materials with specific particle sizes without the need for additional devices or separation methods.
JOURNAL OF SURFACE INVESTIGATION
(2022)
Article
Chemistry, Analytical
Anusha, Aninamol Ani, P. Poornesh, Albin Antony, Bhaghyesh, Igor Shchetinin, K. K. Nagaraja, Saikat Chattopadhyay, K. B. Vinayakumar
Summary: Ag-doped WO3 films were fabricated on a soda-lime glass substrate using a simple spray pyrolysis technique. The surface roughness of the films was found to vary within a range through AFM studies. The gas sensing performance of the films with 1% Ag-WO3 showed significant improvement, achieving a detection limit as low as 500 ppb.
Article
Materials Science, Coatings & Films
Aleksandr Sivkov, Yuliya Shanenkova, Yuliya Vympina, Dmitriy Nikitin, Ivan Shanenkov
Summary: In this study, high-energy plasma spraying is proposed as a reliable method for combining copper and aluminum, forming a copper coating on the inner conical aluminum contact surfaces. By increasing the supplied energy, a thicker coating and a fourfold decrease in contact resistance can be achieved.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
O. Rybalchenko, N. Yu Anisimova, M. Kiselevsky, G. Rybalchenko, N. S. Martynenko, N. R. Bochvar, N. Yu Tabachkova, I. Shchetinin, T. Shibaeva, S. Konushkin, A. A. Tokar, A. G. Raab, S. Dobatkin
Summary: Through equal-channel angular pressing, two Fe-Mn-C alloys were processed to form ultrafine-grained structures, showing increased strength and satisfactory biocompatibility. However, the Fe-36Mn-C alloy samples experienced tension failure due to α-Mn precipitation during deformation.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Alexander G. Kvashnin, Dmitry S. Nikitin, Ivan I. Shanenkov, Ilia V. Chepkasov, Yulia A. Kvashnina, Artur Nassyrbayev, Alexander A. Sivkov, Zhanar Bolatova, Alexander Ya. Pak
Summary: Comprehensive theoretical and experimental studies have led to the discovery of a new synthesis method for Hf-Ta-C coatings. By employing an evolutionary search for stable crystal structures and conducting selective large-scale experimental synthesis using a unique plasma dynamic experimental setup, the research team has achieved the selective synthesis of hafnium-tantalum carbide coatings with predefined properties. Notably, the study paves the way for the synthesis of a wide range of functional coatings composed of various carbides, including high-entropy carbides.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
V. V. Popov, A. P. Menushenkov, A. A. Yastrebtsev, S. G. Rudakov, A. A. Ivanov, B. R. Gaynanov, R. D. Svetogorov, E. V. Khramov, Y. V. Zubavichus, A. Yu. Molokova, N. A. Tsarenko, N. V. Ognevskaya, O. N. Seregina, I. G. Rachenok, I. V. Shchetinin, K. V. Ponkratov
Summary: The influence of the specific type of the lanthanide cation and calcination temperature on the crystal and local structures of Ln2(WO4)3 tungstates (Ln = La-Dy) has been studied using various experimental techniques. The results provide insights into the structural characteristics of Ln tungstates at different scales.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
R. A. Dvorikova, L. G. Komarova, A. S. Peregudov, O. V. Baranov, I. V. Shchetinin, V. A. Vasnev
Summary: A new Schiff base containing ferrocene and silane was synthesized and magnetic materials were successfully obtained by heat treatment.
RUSSIAN CHEMICAL BULLETIN
(2022)
Article
Crystallography
Victor V. Popov, Yan Zubavichus, Alexey P. Menushenkov, Alexey A. Yastrebtsev, Bulat R. Gaynanov, Sergey G. Rudakov, Andrey A. Ivanov, Fyodor E. Dubyago, Roman D. Svetogorov, Evgeny Khramov, Nadezhda A. Tsarenko, Nataliya Ognevskaya, Igor Shchetinin
Summary: The effect of synthesis conditions on the crystallization and hydration of Ln(2)(WO4)(3) (Ln = Gd, Dy, Ho, Yb) powders synthesized via coprecipitation method was studied using various physico-chemical techniques. It was found that the structure and hydration of the tungstates are influenced by the synthesis conditions.
Article
Energy & Fuels
Alexander Astafev, Ivan Shanenkov, Kanipa Ibraeva, Roman Tabakaev, Sergei Preis
Summary: The global energy industry is increasingly using carbon-neutral biomass, and pyrolysis is a common method for processing biomass into valuable energy products. However, the heat demand limits the applications of pyrolysis. This study aimed to make the pyrolysis of Siberian pine nutshell autothermic by using exothermic pyrolysis reactions under selected operation conditions.
Article
Materials Science, Multidisciplinary
I. A. Golovchanskiy, E. Maltsev, I. Shchetinin, V. A. Vlasenko, P. S. Dzhumaev, K. S. Pervakov, O. Emelyanova, A. Yu Tsvetkov, N. N. Abramov, V. M. Pudalov, V. S. Stolyarov
Summary: In this study, we investigated the characteristics of EuSn2As2 single crystals at different temperatures using magnetization measurements, structural characterization, and broad-band ferromagnetic resonance spectroscopy. We observed the conventional collective acoustic resonance mode of the A-type antiferromagnetic canted state in the Eu sub-lattice, as well as its transition to the paramagnetic resonance above the ordering temperature. Additionally, we observed reproducible additional spectral line, which is associated with the magnetism in the Eu sub-lattice.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Chemistry, Physical
Dmitry S. Yakovlev, Dmitry S. Lvov, Olga V. Emelyanova, Pave S. Dzhumaev, Igor V. Shchetinin, Olga V. Skryabina, Sergey V. Egorov, Valery V. Ryazanov, Alexander A. Golubov, Dimitri Roditchev, Vasily S. Stolyarov
Summary: This study investigates the structural and electronic properties of ultrathin nanocrystals of chalcogenide Bi-2(TexSe1-x)(3). The growth conditions were found to have a significant impact on the morphology, structure, and electronic properties of the nanocrystals, which exhibit excellent electron transport and Josephson behavior.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Physical
A. P. Demirov, I. V. Blinkov, V. S. Sergevnin, A. O. Volkhonskii, A. V. Chernogor, I. V. Shchetinin
Summary: The electrochemical behavior and thermal stability of multilayered nanostructured Ti-Al-Mo-N coatings deposited using the Arc-PVD method were studied. The results showed that the stability of the coatings is influenced by the formation of Al2O3 layer, and this effect is more pronounced in the coatings with 8% Mo compared to those with 30% Mo. Furthermore, the thermal stability of the coatings with different Mo contents was investigated at high temperatures.
JOURNAL OF ALLOYS AND COMPOUNDS
(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)