Article
Chemistry, Inorganic & Nuclear
Yue Zhang, Guibo Zheng, Aolin Li, Xukun Zhu, Junjie Jiang, Qi Zhang, Lianwen Deng, Xiaohui Gao, Fangping Ouyang
Summary: In this study, hexagonal single-crystal two-dimensional (2D) CoS nanosheets with different thicknesses were successfully prepared by chemical vapor deposition. The thinnest nanosheets exhibited improved catalytic activity and electrochemical performance.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Toya Seki, Yutaro Seki, Naoto Iwata, Seiichi Furumi
Summary: This article describes a method for synthesizing monodisperse magnetite microparticles with controllable diameter by adjusting the base concentration of the reaction solution. These microparticles spontaneously form colloidal crystal structures and exhibit Bragg reflection colors under an external magnetic field. The fine control of microparticle diameter and investigation of magneto-optical properties would contribute to the technological developments in full-color reflective displays and sensors.
Article
Chemistry, Multidisciplinary
Timur R. Nizamov, Abdulkarim A. Amirov, Tatiana O. Kuznetsova, Irina V. Dorofievich, Igor G. Bordyuzhin, Dmitry G. Zhukov, Anna V. Ivanova, Anna N. Gabashvili, Nataliya Yu. Tabachkova, Alexander A. Tepanov, Igor V. Shchetinin, Maxim A. Abakumov, Alexander G. Savchenko, Alexander G. Majouga
Summary: Novel magnetoelectric nanocomposites of CoxFe3-xO4-BaTiO3 series were synthesized via a two-step chemical approach, which showed tuned magnetic phase structures. These nanocomposites exhibited low toxicity on CT-26 cancer cells in the concentration range of 25-400 μg/mL and have great potential in biomedical applications.
Article
Chemistry, Physical
Greta Zambzickaite, Martynas Talaikis, Jorunas Dobilas, Voitech Stankevic, Audrius Drabavicius, Gediminas Niaura, Lina Mikoliunaite
Summary: The study presents a fast synthesis method for iron oxide magnetic particles using an eco-friendly and facile microwave-assisted solvothermal method. The addition of polyethylene glycol affects the particle composition, and the synthesis time influences the crystallite size.
Article
Chemistry, Physical
Yinghua Qiu, Yunpeng Wang
Summary: Controlling the morphology of W18O49 nanostructures is essential for achieving high NO2-sensing performance. In this study, W18O49 nanostructures were synthesized through a solvothermal process by adjusting various parameters. Under optimized conditions, one-dimensional nanoneedles composed of mono-clinic W18O49 were obtained, which exhibited excellent gas sensing performance towards NO2. The W18O49 nanoneedles showed a high response to NO2 in a wide range of concentrations, excellent selectivity, and long-term stability, attributed to the presence of oxygen vacancies, needle-shaped nanostructures, and high BET surface area.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Jiwoong Oh, Jooyoung Jang, Eunho Lim, Changshin Jo, Jinyoung Chun
Summary: NCF/rGO nanocomposites were successfully fabricated via a simple method and exhibited high reversible capacity and cyclability as cathodes for Li-ion batteries. The NCF nanoclusters played a key role in providing efficient ion diffusion and rapid electron transfer, contributing to the enhanced electrochemical performance.
Article
Chemistry, Multidisciplinary
Bicheng Wang, Yu Yao, Wenting Hong, Zhaoan Hong, Xu He, Taiku Wang, Chuanyong Jian, Qiankun Ju, Qian Cai, Zhihua Sun, Wei Liu
Summary: A molecular sieve-assisted strategy is used to synthesize ultrathin 2D iron sulfide with different phases. Hexagonal FeS, tetragonal FeS, and non-stoichiometric Fe7S8 can be precisely synthesized by tuning the growth temperatures. The synthesized 2D iron sulfides exhibit high conductivity, superconductivity, and ferrimagnetism, providing a potential route for synthesizing other 2D compounds with different phases.
Article
Chemistry, Physical
Peng Sheng, Rongrong Ye, Dajun Wu, Lei Zhang, Xuee An, Shi Tao, Bin Qian, Paul K. Chu
Summary: Transition metal selenides, specifically cobalt nickel selenides, have shown promising potential as electrode materials in supercapacitors due to their good electron conductivity and high theoretical specific capacity. By modulating the morphology and enhancing the electrochemical properties through nickel doping, Co0.8Ni0.2Se2 electrodes exhibit high specific capacitance and good cycling stability. The assembled asymmetrical supercapacitor demonstrated a capacity of 120 mF cm-2 after 8000 cycles at a current density of 1 mA cm-2, with superior power density of 3.75 mW cm-2 and energy density of 0.052 mWh cm-2, highlighting the practicality and high potential of Co0.8Ni0.2Se2 as electrode materials in supercapacitors.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Nanoscience & Nanotechnology
Yu Zhen Dong, Hyoung Jin Choi
Summary: The reduced graphene oxide/cobalt ferrite magnetic composite particle synthesized via solvothermal process exhibited promising rheological properties as a magnetorheological material. The study showed that the magnetic field strength-dependent yield stresses of the composite particles fit the universal yield stress function well, indicating their potential for MR applications.
Article
Chemistry, Multidisciplinary
Q. Chen, H. Li, Z. Q. Wu, L. L. Zhu, C. D. Li, X. B. Zhu, Y. P. Sun
Summary: A simple one-step magneto-solvothermal method is developed to prepare three-dimensional porous network nickel cobalt sulfide (NiCo2S4) as electrodes for supercapacitors, resulting in excellent electro-chemical performance. NiCo2S4 electrodes exhibit high specific capacitance (605.8 C/g at 1 A/g) and excellent rate capability (80% remained capacitance after 3000 charge-discharge cycles at a current density of 10 A/g) by modulating the microscopic morphology with magnetic fields, which increases the exposure of the active sites significantly. Moreover, hybrid supercapacitors fabricated by NiCo2S4 prepared under a magnetic field of 3 T as the positive electrode and carbon electrode (activated carbon) as the negative electrode demonstrate a high energy density of 22.65 Wh/kg at the power density of 750.14 W/kg and excellent cycling stability. This work provides a novel route to improve the electrochemical performances of NiCo2S4 using the magneto-solvothermal method.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Zhengjie Wang, Wenchao Meng, Fengxi Chen
Summary: The direct synthesis of functionalized magnetic iron oxide (MIO) microspheres was achieved using TEMPO-assisted glycothermal synthesis to prepare monodisperse microspheres with enhanced adsorption capacity for Congo red and self-catalyzed regeneration with H2O2 in wastewater treatment applications.
Article
Environmental Sciences
Muthaimanoj Periyasamy, Sumanta Sain, Eliza Ghosh, Kellie J. Jenkinson, Andrew E. H. Wheatley, Sudipta Mukhopadhyay, Arik Kar
Summary: The study successfully synthesized magnetite nanoparticles with superparamagnetism and excellent optical properties, and thoroughly characterized the structure and performance of the nanocomposites. Through optical and photocatalytic experiments, the potential application of the nanocomposites in degrading toxic dyes was demonstrated.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Biochemistry & Molecular Biology
Madina Suleimenova, Saule Zharylkan, Meruyert Mekenova, Alibek Mutushev, Seytkhan Azat, Aidana Tolepova, Alzhan Baimenov, Aliya Satayeva, Zhandos Tauanov
Summary: This study presents the synthesis of zeolites derived from coal fly ash (CFA) using the fusion-assisted alkaline hydrothermal method. The zeolites were synthesized by combining CFA and NaOH at a molar ratio of 1:1.2 under different fusion temperatures. Subsequently, the obtained zeolites were modified by incorporating magnetic (Fe3O4) and silver (Ag-0) nanoparticles (NPs). The synthesized porous materials exhibited the formation of zeolites, and the modified composites showed high adsorption capacities for mercury ions.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Rashmi Mahajan, Subramanian Suriyanarayanan, Ian A. Nicholls
Summary: Monodisperse magnetic gamma-Fe2O3 nanoparticles (MNPs) were prepared using SDS and PEG 6000 as double capping reagents, leading to improved uniformity and colloidal stability. These MNPs with silica coatings can be used in a variety of applications, such as magnetic separation, catalysis, and templated nanogel synthesis.
Article
Physics, Condensed Matter
Mohammad Jazirehpour, Omid Khani, Mahdi Jafari
Summary: The current study successfully synthesized hematite nanoparticles using hydrothermal method and achieved particles with different morphologies through adjusting the synthesis conditions. It was found that the aspect ratio of magnetite nanoparticles had a significant impact on their magnetic properties, and the magnetization intensity could be controlled by tuning the aspect ratio.
PHYSICA B-CONDENSED MATTER
(2022)
