In situ sol-gel co-synthesis at as low hydrolysis rate and microwave sintering of PZT/Fe 2 CoO 4 magnetoelectric composite ceramics

Fernandez, C. P.; Zabotto, F. L.; Garcia, D.; Kiminami, R. H. G. A.

doi:10.1016/j.ceramint.2017.01.100

Cited by 17 publications

(6 citation statements)

References 31 publications

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“…Eight diffraction peaks were observed at 2θ = 18.31, 30.13, 35.47, 36.87, 43.12, 54.11, 57.00, and 62.59°, which were indexed to the (111), (220), (311), (222), (400), (422), (511), and (440) diffractions consistent with face-centered cubic spinel CoFe 2 O 4 nanocrystals (space group: Fd 3 m , JCPDS card no. 03-0864) . Nitrogen adsorption measurements were used to confirm cube-like mesoporous structure characteristics of OFE. − It was in good agreement with the results of transmission electron microscopy.…”

Section: Results and Discussionsupporting

confidence: 65%

“…03-0864). 36 Nitrogen adsorption measurements were used to confirm cube-like mesoporous structure characteristics of OFE. 37−41 It was in good agreement with the results of transmission electron microscopy.…”

Section: Results and Discussionmentioning

confidence: 99%

“…A mesoporous structure is displayed in Figure A,B . As shown in Figure S1, magnetic performance was determined in which coercive force was 135828 A·m –1 of OFE and the saturation magnetization value was 8.58 emu·g –1 , far below those of Fe 2 O 3 , Fe 3 O 4 , γ-Fe 2 O 3 , and CoFe 2 O 4 . , However, below saturation magnetization will be more favorable for particles uniformly dispersed in the solution. In Figure , the SEM micrograph of OFE is shown.…”

Section: Results and Discussionmentioning

confidence: 99%

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Enhanced Activation of Persulfate by Meso-CoFe₂O₄/SiO₂ with Ultrasonic Treatment for Degradation of Chlorpyrifos

Xie

2019

ACS Omega

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Magnetic mesoporous CoFe2O4/SiO2 (Meso-CoFe2O4/SiO2) composites were simply synthesized. On the basis of previous studies, optimum preparation conditions of their structure and physical properties can be readily determined. CoFe2O4 nanocrystals and their mesoporous structure were authenticated by low-angle and wide-angle X-ray diffraction, high-resolution transmission electron microscopy, scanning electron microscopy, element mapping, X-ray photoelectron spectroscopy, nitrogen adsorption isotherms, and so on. They were applied to degrade chlorpyrifos where Meso-CoFe2O4/SiO2 composites provide a mesoporous microenvironment and combined with ultrasonic treatment can enhance heterogeneous activation of persulfate. Research findings showed that the system can be conducive to remove quickly chlorpyrifos and the removal ratios reached 99.99%. The results provided a strategy for the chlorpyrifos degradation and, similarly, pollution control of pesticide wastewater.

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Section: Results and Discussionsupporting

confidence: 65%

Section: Results and Discussionmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

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Enhanced Activation of Persulfate by Meso-CoFe₂O₄/SiO₂ with Ultrasonic Treatment for Degradation of Chlorpyrifos

Xie

2019

ACS Omega

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“…Table 3 shows the most frequent precursors and solvents used for preparation of hydroxyapatite. Generally, the selected phosphorus and calcium precursors dissolve in solvents separately, then, mix together in a dropwise approach with controlling the molar ratio [ 74 , 75 ]. The molar ratio of Ca/P in the bone apatite is detected to be 1.67, which is necessary to synthesis HAp with a ratio as close as possible to 1.67 to simulate the body environment [ 76 ].…”

Section: Sol-gel Deposition Of Hydroxyapatitementioning

confidence: 99%

Sol-Gel Derived Hydroxyapatite Coatings for Titanium Implants: A Review

et al. 2020

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With the growing demands for bone implant therapy, titanium (Ti) and its alloys are considered as appropriate choices for the load-bearing bone implant substitutes. However, the interaction of bare Ti-based implants with the tissues is critical to the success of the implants for long-term stability. Thus, surface modifications of Ti implants with biocompatible hydroxyapatite (HAp) coatings before implantation is important and gained interest. Sol-gel is a potential technique for deposition the biocompatible HAp and has many advantages over other methods. Therefore, this review strives to provide widespread overview on the recent development of sol-gel HAp deposition on Ti. This study shows that sol-gel technique was able to produce uniform and homogenous HAp coatings and identified the role of surface pretreatment of Ti substrate, optimizing the sol-gel parameters, substitution, and reinforcement of HAp on improving the coating properties. Critical factors that influence on the characteristics of the deposited sol-gel HAp films as corrosion resistance, adhesion to substrate, bioactivity, morphological, and structural properties are discussed. The review also highlights the critical issues, the most significant challenges, and the areas requiring further research.

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“…In the past few decades, the sol-gel method (combined with other techniques including microwave heating, ultrasonication, spin-coating, dip coating, laminar flow coating, and strong field induction) have been used to prepare various kinds of advanced materials with different morphologies including magnetic [1,2,3,4,5,6,7,8,9,10], optical [11,12,13], electronic [14,15], and structural [16,17,18,19,20,21,22,23,24,25] particles, and hollow spheres [26], fibers [27], nanowires [28] and films [29,30,31,32,33,34]. Many reviews have been published on the preparation of particles and coatings using the sol-gel process; for instance, Guo et al [35] summarized the sol-gel synthesis and application of monodisperse nanoparticles and granules including Li 2 TiO 3 , ZnO-B 2 O 3 -SiO 2 additive, La 1−x Sr x CoO 3-δ (x = 0.1 − 0.7) and Y 3 Al 5 O 12 .…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Hollow Sphere and 1D Structural Materials by Sol-Gel Process

Zhang

2017

Materials

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The sol-gel method is a simple and facile wet chemical process for fabricating advanced materials with high homogeneity, high purity, and excellent chemical reactivity at a relatively low temperature. By adjusting the processing parameters, the sol-gel technique can be used to prepare hollow sphere and 1D structural materials that exhibit a wide application in the fields of catalyst, drug or gene carriers, photoactive, sensors and Li-ion batteries. This feature article reviewed the development of the preparation of hollow sphere and 1D structural materials using the sol-gel method. The effects of calcination temperature, soaking time, pH value, surfactant, etc., on the preparation of hollow sphere and 1D structural materials were summarized, and their formation mechanisms were generalized. Finally, possible future research directions of the sol-gel technique were outlined.

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In situ sol-gel co-synthesis at as low hydrolysis rate and microwave sintering of PZT/Fe 2 CoO 4 magnetoelectric composite ceramics

Cited by 17 publications

References 31 publications

Enhanced Activation of Persulfate by Meso-CoFe₂O₄/SiO₂ with Ultrasonic Treatment for Degradation of Chlorpyrifos

Enhanced Activation of Persulfate by Meso-CoFe₂O₄/SiO₂ with Ultrasonic Treatment for Degradation of Chlorpyrifos

Sol-Gel Derived Hydroxyapatite Coatings for Titanium Implants: A Review

Synthesis of Hollow Sphere and 1D Structural Materials by Sol-Gel Process

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In situ sol-gel co-synthesis at as low hydrolysis rate and microwave sintering of PZT/Fe 2 CoO 4 magnetoelectric composite ceramics

Cited by 17 publications

References 31 publications

Enhanced Activation of Persulfate by Meso-CoFe2O4/SiO2 with Ultrasonic Treatment for Degradation of Chlorpyrifos

Enhanced Activation of Persulfate by Meso-CoFe2O4/SiO2 with Ultrasonic Treatment for Degradation of Chlorpyrifos

Sol-Gel Derived Hydroxyapatite Coatings for Titanium Implants: A Review

Synthesis of Hollow Sphere and 1D Structural Materials by Sol-Gel Process

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Product

Resources

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Enhanced Activation of Persulfate by Meso-CoFe₂O₄/SiO₂ with Ultrasonic Treatment for Degradation of Chlorpyrifos

Enhanced Activation of Persulfate by Meso-CoFe₂O₄/SiO₂ with Ultrasonic Treatment for Degradation of Chlorpyrifos