Article
Materials Science, Multidisciplinary
Roberto Koeferstein, Florian Oehler, Stefan G. Ebbinghaus
Summary: Magnetoelectric composites were synthesized using PEG400 and characterized for their microstructure and magnetic properties. The composites exhibited ferrimagnetic behavior with variable saturation magnetization and coercivities. Impedance spectroscopy revealed a decrease in relative permittivities with increasing frequency and CoFe2O4 fraction. The magnetoelectric coefficient showed a dependence on both the CoFe2O4 fraction and sintering temperature, with a maximum value observed at x = 0.3. The frequency dependence of the coefficient was also investigated.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Ceramics
Jiayi Wang, Shuhang Hu, Qi Tang, Jian Xu, Nianxi Xu, Shansheng Yu, Xiaoyi Wang, Hongwei Tian
Summary: In this study, rGO/SiC/CoFe2O4 composite materials were prepared by combining SiC and CoFe2O4 with rGO. The electromagnetic properties of the composites were controlled by varying the CoFe2O4 content. Among them, the sample with a CoFe2O4 content of 1.5 g exhibited the best microwave absorption performance.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Bo Jia, Zengzhe Xi, Feifei Guo, Shaokun Zhang, Shasha Dong, Wei Long, Xiaojuan Li, Pinyang Fang, Zhonghua Dai
Summary: CuO-doped PSN-PMN-PT ceramics synthesized at low sintering temperature exhibit improved phase transition temperature and piezoelectric properties, making them promising candidates for multilayer piezoelectric devices and pyroelectric infrared detectors applications.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Inorganic & Nuclear
Fatima Sayed, Deep Chandra Joshi, Ganesh Kotnana, Davide Peddis, Tapati Sarkar, Roland Mathieu
Summary: This study successfully synthesized ferroelectric-ferrimagnetic BaTiO3-CoFe2O4 nanocomposites using low-cost and scalable sol-gel chemistry. The nanocomposites exhibited average crystallite sizes of around 20 nm for the BaTiO3 phase and demonstrated excellent magnetic and dielectric properties.
INORGANICA CHIMICA ACTA
(2021)
Article
Biochemistry & Molecular Biology
Jing-jing Shao, Bo Cai, Cheng-rui Zhang, Ying-ao Hu, Hui Pan
Summary: This study investigated the application of cellulose-supported cobalt ferrite catalyst for the degradation of sulfa-methoxazole. The results showed that the particle size of the catalyst plays a crucial role in its catalytic activity, and the mechanism mainly involves the generation of reactive oxygen species.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Materials Science, Multidisciplinary
Priyanka Phalswal, P. K. Khanna
Summary: The microwave-assisted synthesis of MoO2 nanoparticles using a home microwave oven proved to be effective, yielding nearly phase pure nanostructured MoO2 with particle diameter of less than 14 nm.
Article
Chemistry, Physical
Yue Yuan, Shicheng Wei, Yi Liang, Bo Wang, Yujiang Wang, Wei Xin, Xinlei Wang, Yu Zhang
Summary: The cobalt ferrite/carbon nanotubes nanocomposite absorber materials synthesized by a solvothermal method demonstrate excellent absorption properties and a wide absorption bandwidth, making them suitable for microwave absorbers in various technological applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Dariusz Bochenek, Przemyslaw Niemiec, Grzegorz Dercz, Artur Chrobak
Summary: This study elaborates on the technology of multiferroic ceramic composites sintered by the spark plasma sintering method and presents their structural, microstructural, dielectric, ferroelectric and magnetic characteristics. The results show that the composite materials have high permittivity and small dielectric loss tangent, properly saturated ferroelectric polarization, and typical magnetic properties of ferroelectro-ferromagnetic composites. The spark plasma sintering method improves the sinterability of the material, maintains high performance parameters, and significantly reduces the processing temperature and time of the composites.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Enrico Paradisi, Roberto Rosa, Giovanni Baldi, Valentina Dami, Andrea Cioni, Giada Lorenzi, Cristina Leonelli
Summary: This article introduces a new method for fast and simple synthesis of crystalline TiO2 nanoparticles with photocatalytic activity, and demonstrates the application of this method in the production of nanotitania.
Article
Materials Science, Multidisciplinary
A. V. Ravindra, Shaohua Ju
Summary: Cobalt ferrite (CoFe2O4) nanoparticles with a size of 7-20 nm were easily synthesized by a microwave-hydrothermal route at temperatures of 100, 150, and 200 degrees C. The synthesized nanoparticles exhibited a pure spinel CoFe2O4 phase, high thermal stability, and a spherical morphology. The magnetic properties of the nanoparticles varied with synthesis temperature/particle size, with an increase in MS value and a decrease in Mr and Hc values as the temperature increased. The findings of this study provide insights into tailoring the properties of CoFe2O4 nanoparticles for specific applications using microwave-hydrothermal synthesis.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Jie Li, Guobin Xu, YingMin Lu, Xuan Xia, Wenqi Song, Qi Wang, Chao Liu
Summary: In this study, blue, green, and red water-dispersible carbon dots (CDs) with trichromatic properties were prepared and analyzed for their morphological characteristics and optical properties. The results showed that adjustable fluorescent colors and white emission could be achieved by adjusting the mixing ratio of CDs, and multicolor polyvinyl alcohol fluorescent films were synthesized using CDs as pigments.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Ruihua Guo, Na An, Yarong Huang, Lili Guan, Guofang Zhang, Guofu Zhu, Zhaogang Liu
Summary: This study successfully prepared Pt nanocatalysts with high-index facets by adjusting the amount of PVP and glycine, and found that the electrocatalytic performance of the prepared catalyst was better than that of the commercial catalyst. The defects such as steps and kinks on the surface of the high-index facets increased the active sites, resulting in excellent electrocatalytic performance. This study provides a theoretical basis for the development and commercial application of high index facets nanocatalysts.
Article
Chemistry, Multidisciplinary
Shoulin Zhang, Pu Wang, Yaoshun Chen, Wenqing Yao, Zhijuan Li, Yawen Tang
Summary: Researchers have successfully prepared hollow porous Pt nanobowls using a one-pot hydrothermal method, which exhibit enhanced electrocatalytic methanol oxidation reaction activity and excellent stability.
Article
Infectious Diseases
Fabio Bucciol, Elia Maffeis, Emanuela Calcio Gaudino, Laszlo Jicsinszky, Silvia Tagliapietra, Alessandro Barge, Cristina Prandi, Giancarlo Cravotto
Summary: The study focuses on selectively synthesizing active pharmaceutical molecules using microwave irradiation and a specific catalyst, with higher yield achieved under specific starting material.
Article
Metallurgy & Metallurgical Engineering
Shui-sheng Wu, Dong-hui Lan, Xiao-wen Zhang, Yi Huang, Xing-hong Deng, Chak-tong Au, Bing Yi
Summary: The magnetic CoFe2O4@rGO composite synthesized by microwave-hydrothermal method shows excellent uranium adsorption performance, making it potentially useful in the treatment of uranium-polluted water.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2021)
Article
Materials Science, Ceramics
M. M. Togashi, C. P. F. Perdomo, R. H. G. A. Kiminami
CERAMICS INTERNATIONAL
(2020)
Article
Chemistry, Inorganic & Nuclear
Lais P. Caminata, Claudia P. F. Perdomo, Ruth H. G. A. Kiminami
JOURNAL OF SOLID STATE CHEMISTRY
(2020)
Article
Chemistry, Multidisciplinary
Ana F. F. Farias, Deisy T. de Araujo, Adriano L. da Silva, Elvia Leal, Jose G. A. Pacheco, Manoel R. Silva, Ruth H. G. A. Kiminami, Ana C. F. de M. Costa
ARABIAN JOURNAL OF CHEMISTRY
(2020)
Article
Engineering, Chemical
Juan P. Yasno, Ruth H. G. A. Kiminami
ADVANCED POWDER TECHNOLOGY
(2020)
Article
Materials Science, Ceramics
Gabriela Pitolli Lyra, Valdemir Santos, Eliria Maria de Jesus Agnolon Pallone, Ruth Herta Goldschmidt Aliaga Kiminami, Bruno Carlos De Santis, Joao Adriano Rossignolo
Summary: The study compared the effects of hybrid sintering of clay ceramics in microwave and conventional furnaces. Results showed that microwave sintering increased microhardness and density, while reducing water absorption and porosity values, leading to denser microstructure. Best results were achieved with sintering at 1100 degrees Celsius.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Bruna G. de Souza, Gustavo Figueira, Maria H. Carvalho, Victor Alcaraz-Gonzalez, Karla E. Saldana-Flores, Mario Godinho Jr, Adilson J. A. de Oliveira, Ruth H. G. A. Kiminami, Luis A. M. Ruotolo, Ernesto A. Urquieta-Gonzalez
Summary: A novel unconventional coprecipitation procedure combined with a simple and fast microwave-assisted hydrothermal treatment was used to synthesize a new nanocrystalline magnetic cobalt ferrite with photo-Fenton activity. The study demonstrated that microwave hydrothermal treatment is essential for obtaining magnetic and photoactive Co-ferrite, with photoactivity mainly attributed to the migration of Co2+ ions during the MAH treatment.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Andre L. F. Cardoso, Claudia P. F. Perdomo, Ruth H. G. A. Kiminami, Rodolfo F. K. Gunnewiek
Summary: In this study, nanostructured single phase high entropy oxide was synthesized by a fast polymeric solution method, with gadolinium homogeneously distributed in crystallites. The addition of Gd3+ increased the configurational entropy and affected lattice expansion, mainly associated with copper diffusion. Gadolinium enhanced asymmetry on longitudinal-optic Raman mode and prevented excessive crystallite growth.
Article
Materials Science, Multidisciplinary
Gislayne Rayane Alves da Silva, Claudia Patricia Fernandez Perdomo, Rodolfo Foster Klein-Gunnewiek, Ruth Herta Goldschmidt Aliaga Kiminami
Summary: The study analyzed the crystallization kinetics and structural characterization of the NBT-BT6 system, revealing the initial crystallization process of NBT-BT6 at 450 degrees C, with a formation energy between 121 and 167 kJ/mol. The results of DSC analysis confirmed the formation of the ferroelectric NBT-BT6 phase at 270 degrees C, with the obtained nanopowders showing coexistence of rhombohedral and tetragonal structures at 650 degrees C.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Ceramics
C. P. Fernandez Perdomo, M. Mazzeto, R. H. G. A. Kiminami
Summary: This study investigates the effect of different precursors on the crystallization process and characteristics of ceramic powders synthesized by wet routes. The results show that using BaCO3 and Co(CH3COO)(2) precursors allows for simultaneous crystallization of two phases, while using nitrate precursors leads to the formation of core-shell heterostructures. Additionally, the One Pot-MPC method enables the efficient and rapid synthesis of a lead-free 0.5BZT/0.5FCO biphasic nanoparticulate system with ferrimagnetic behavior.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Andre L. F. Cardoso, Claudia P. F. Perdomo, Beatriz G. Foschiani, Iago C. S. Barbara, Julia A. Xaraba, Fabio L. Zabotto, Rodolfo F. K. Gunnewiek
Summary: A single-phase high entropy (CoCrFeMnNi)3O4 spinel with a cubic structure was successfully microwave-synthesized and characterized. The synthesized material exhibited nanostructures and the formation of a single-phase required a calcination temperature of at least 800 degrees C. Furthermore, the material showed tunable band gap energy values, indicating its potential as a catalyst for catalytic conversion applications.
Article
Materials Science, Multidisciplinary
Igor C. Cancellieri, Claudia P. F. Perdomo, Dereck N. F. Muche, Marco A. L. Cordeiro, Rodolfo F. K. Gunnewiek
Summary: CuO/Cu2O microspheres were synthesized through rapid microwave-assisted spray pyrolysis within 20 minutes without additional treatment. The microspheres had an average size of 577 ± 192 nm and consisted of nanostructured primary particles (crystallites) measuring 17.9 ± 2.8 nm. X-ray diffraction analysis confirmed well-crystallized phases and significant lattice distortion in Cu2O. The material exhibited a bandgap of 1.28 eV, making it suitable for photoelectrochemistry and photocatalysis applications.
Article
Materials Science, Multidisciplinary
Marina Magro Togashi, Claudia Patricia Fernandez Perdomo, Ruth H. G. A. Kiminami
Summary: Microwave-assisted sintering is an advantageous technique for ceramic materials processing, promoting lower grain growth and densification with shorter dwell times. The aim of this study was to evaluate the effect of heating rate and dwell time on grain growth kinetics during microwave-assisted sintering of hematite nanopowders. It was found that higher microwave heating rates resulted in higher activation energy for grain growth.
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS
(2023)
