Microwave assisted synthesis of nanostructured Fe3O4/ZnO microparticles

Machovský, Michal; Kuřitka, Ivo; Kožáková, Zuzana

doi:10.1016/j.matlet.2012.07.038

Cited by 16 publications

(8 citation statements)

References 11 publications

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“…As a metal oxide, ZnO is an attractive material that used in the opto-electronic devices [1], gas-and bio-sensors [2,3], photocatalysis devices [4] and magnetic devices [5] with unique properties such as high chemical and physical stabilization, wide optical band gap (~3.7 eV) and abundant in nature. Microstructures and nanostructures have been preferred more than their bulk counterparts because of their finite size effect and high surface to volume ratio.…”

Section: Introductionmentioning

confidence: 99%

Geçiş Metali Katkılı ZnO’in Ferromanyetizma ve Büyüme Korelasyonunun İncelenmesi

Sarf

Asikuzun

Yakar

2021

International Journal of Advances in Engineering and Pure Sciences

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In this study, a series of 3d transition metal (TM) (Co, Ni and Fe) doped ZnO particles synthesized by simple co-precipitation method. Structural, morphological and magnetic properties were investigated to determine correlation between growth process and ferromagnetism of metal doped ZnO samples. All samples had ZnO hexzagonal würtzite structure and slightly shift of ZnO indexed peaks was observed by TM incorporation in ZnO. Although ZnO samples had granular forms, agglomerative forms had emerged in TM:ZnO samples due to the fast growth process. The pure ZnO sample transformed paramagnetic to ferromagnetic by TM incorporation due to carrier mediated exchange interaction between TM ions. The results demonstated that doping with Fe 3+ ions in ZnO structure had enhanced ferromagnetism although fast growth and high particle agglomeration.

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Section: Introductionmentioning

confidence: 99%

Geçiş Metali Katkılı ZnO’in Ferromanyetizma ve Büyüme Korelasyonunun İncelenmesi

Sarf

Asikuzun

Yakar

2021

International Journal of Advances in Engineering and Pure Sciences

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“…The preparation of the fillers based on TiO 2 , ZnO or Ag of various shapes by employing conventional hydro or solvo-thermal procedures, which are high temperature, pressure and time demanding processes, is considerably cost-ineffective [35][36][37]. In recent decades, there have been different microwave-assisted procedures able to provide particles of an appropriate shape and structure that have sufficiently low costs [38][39][40][41]. Effectivity and short reaction times are some of the benefits that can shift this approach toward large-scale production.…”

Section: Introductionmentioning

confidence: 99%

Vibration Sensing Systems Based on Poly(Vinylidene Fluoride) and Microwave-Assisted Synthesized ZnO Star-Like Particles with Controllable Structural and Physical Properties

et al. 2020

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This study deals with the effect of zinc oxide (ZnO) star-like filler addition to the poly(vinylidene fluoride) (PVDF) matrix, and its effect on the structural and physical properties and consequences to the vibration sensing performance. Microwave-assisted synthesis in open vessel setup was optimized for the preparation of the star-like shape of ZnO crystalline particles. The crystalline and star-like structure was confirmed by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDX). Furthermore, the PVDF-based composites were prepared using a spin-coating technique from solution. An investigation of the transformation of the α crystalline phase to the β crystalline phase of the neat PVDF matrix and with various filler concentrations was performed using Fourier-Transform infrared (FTIR) spectroscopy, which shows an enhanced β-phase from 44.1% to 66.4% for neat PVDF and PVDF with 10 wt.% of particles, respectively. Differential scanning calorimetry (DSC) measurements and investigation showed enhanced crystallinity and melting enthalpy of the composite systems in comparison to neat PVDF, since ZnO star-like particles act as nucleating agents. The impact of the filler content on the physical properties, such as thermal and dynamic mechanical properties, which are critical for the intended applications, were investigated as well, and showed that fabricated composites exhibit enhanced thermal stability. Because of its dynamic mechanical properties, the composites can still be utilized as flexible sensors. Finally, the vibration sensing capability was systematically investigated, and it was shown that the addition of ZnO star-like filler enhanced the value of the thickness mode d33 piezoelectric constant from 16.3 pC/N to 29.2 pC/N for neat PVDF and PVDF with 10 wt.% of ZnO star-like particles.

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“…Despite the high photocatalytic activity of rGO-ZnO nanocomposites, there is an increasing impediment due to the difficulty of recycling them. Many of the previous and current research studies investigating the issue of recycling nanocomposite photocatalysts have been more concerned with the incorporation of these photocatalysts with magnetic nanoparticles, Fe 3 O 4 [ 27 , 28 , 29 , 30 , 31 ]. The criteria for selecting the magnetic nanoparticles include high surface area due to the increased durability and ability to prevent the agglomeration of the catalysts, in addition to being easily isolated with an external magnetic field from water [ 32 ].…”

Section: Introductionmentioning

confidence: 99%

Magnetic ZnO Crystal Nanoparticle Growth on Reduced Graphene Oxide for Enhanced Photocatalytic Performance under Visible Light Irradiation

et al. 2021

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Magnetite zinc oxide (MZ) (Fe3O4/ZnO) with different ratios of reduced graphene oxide (rGO) was synthesized using the solid-state method. The structural and optical properties of the nanocomposites were analyzed using transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectroscopy, Fourier-transform infrared spectroscopy (FTIR), ultraviolet–visible diffuse reflectance spectroscopy (UV–Vis/DRS), and photoluminescence (PL) spectrophotometry. In particular, the analyses show higher photocatalytic movement for crystalline nanocomposite (MZG) than MZ and ZnO nanoparticles. The photocatalytic degradation of methylene blue (MB) with crystalline ZnO for 1.5 h under visible light was 12%. By contrast, the photocatalytic activity for MZG was more than 98.5%. The superior photocatalytic activity of the crystalline nanocomposite was detected to be due to the synergistic effect between magnetite and zinc oxide in the presence of reduced graphene oxide. Moreover, the fabricated nanocomposite had high electron–hole stability. The crystalline nanocomposite was stable when the material was used several times.

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Microwave assisted synthesis of nanostructured Fe3O4/ZnO microparticles

Cited by 16 publications

References 11 publications

Geçiş Metali Katkılı ZnO’in Ferromanyetizma ve Büyüme Korelasyonunun İncelenmesi

Geçiş Metali Katkılı ZnO’in Ferromanyetizma ve Büyüme Korelasyonunun İncelenmesi

Vibration Sensing Systems Based on Poly(Vinylidene Fluoride) and Microwave-Assisted Synthesized ZnO Star-Like Particles with Controllable Structural and Physical Properties

Magnetic ZnO Crystal Nanoparticle Growth on Reduced Graphene Oxide for Enhanced Photocatalytic Performance under Visible Light Irradiation

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