Optical and magnetic properties of wollastonite and its nanocomposite crystalline structure with hematite

Mahdy, Manal A.; Kenawy, Sayed H.; Zawawi, I. K. El; Hamzawy, Esmat M. A.; El‐Bassyouni, Gehan T.

doi:10.1016/j.ceramint.2019.11.144

Cited by 16 publications

(5 citation statements)

References 40 publications

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“…Characterization of Developed Treatments No. 00-037-1485) were crystallized in CSZn3 [25,28]. The developed crystalline phases and the microstructures in the composites are shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Calcium silicate is added pharmaceutically as an inactive ingredient for industrial purposes (Yuasa et al 1996) due to its speci c physical characteristics such as uniform structure, and large pore volume and surface area. It is an excellent material for drug delivery systems since it has a large surface area for drug adsorption having no cytotoxic effects [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

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Zinc Oxide Calcium Silicate Composite Attenuates Acute Tramadol Toxicity in Mice

ElShebiney

Elgohary

Kenawy

et al. 2022

Preprint

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Background Seizures are considered to be the most common symptom encountered in emergency- rushed tramadol-poisoned patients; accounting for 8% of the drug-induced seizure cases. Although, diazepam clears these seizures, the risk of central respiratory depression cannot be overlooked. Henceforth, three adsorbing composites were examined in a tramadol acute intoxication mouse model. Methods Calcium Silicate (Wollastonite) either non-doped or wet doped with iron oxide (3%Fe2O3) or zinc oxide (30% ZnO) were prepared. The composites’ adsorption capacity for tramadol was determined in vitro. Tramadol intoxication was induced in Swiss albino mice by a parenteral dose of 120 mg/kg. Proposed treatments were administered within 1 min at 5 increasing doses, i.p. The next 30 minutes, seizures were monitored as an intoxication symptom. Plasma tramadol concentration was recorded after two hours of administration. Results The 3% Fe2O3-containing composite (CSFe3), was found to be composed of mainly wollastonite with very little alpha–hematite. On the other hand, hardystonite and wellimite were developed in the 30%ZnO-containing composite (CSZn3). Micro-round and irregular nano-sized microstructures were established (The particle size of CS was 56nm, CSFe3 was 49 nm, and CSZn3 was 42 nm). The CSZn3 adsorption capacity reached 1497 mg of tramadol for each gram. Tramadol concentration was reduced in plasma and seizures were inhibited after its administration to mice at three doses. Conclusion The calcium silicate composite doped with ZnO presented a good resolution of tramadol-induced seizures accompanied by detoxification of blood, indicating its potential for application in such cases. Further studies are required.

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“…Characterization of Developed Treatments No. 00-037-1485) were crystallized in CSZn3 [25,28]. The developed crystalline phases and the microstructures in the composites are shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Zinc Oxide Calcium Silicate Composite Attenuates Acute Tramadol Toxicity in Mice

ElShebiney

Elgohary

Kenawy

et al. 2022

Preprint

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“…The strong dipolar interaction affected the shape of the hysteresis cycle and caused distorted loops called wasp-waisted hysteresis [33,38]. Also, this shape of hysteresis is owing to the inadequate thermal contact of the specimen with heat, which triggers the dynamic moving of the spin system out of thermal equilibrium [39]. This case is known as a low-spin system in which there is no magnetostructural energy barrier to assist the whole spin in reversed [40].…”

Section: Magnetic Propertiesmentioning

confidence: 99%

Tailoring ZnO/CoFe₂O₄ nanocomposites: structure, optical, dielectric and magnetic study

Mahdy¹,

Azab²,

Zawawi³

et al. 2022

Phys. Scr.

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The structural, morphology, optical, magnetic and dielectric properties of the (ZnO)1–x(CoFe2O4)x, (x= 1, 3 and 5 wt.%) nanocomposites synthetized by sonomechanical method were investigated using XRD, FE-SEM, HR-TEM, UV-visible, VSM and BDS. XRD analysis shows that, ZnO and CoFe2O4 acquired hexagonal and cubic phases, respectively. The optical band gap was reduced from 3.22 eV for pure ZnO to 3.15 eV after adding 5wt % of CoFe2O4. Addition of 1wt% CoFe2O4 to ZnO matrix showed a noticeable ferromagnetic behavior that was predominant in the prepared nanocomposites and confirmed by the convex Arrott–Belov–Kouvel curves. The dielectric constant, , at higher frequencies of the investigated nanocomposites is relatively high (8-10) accompanied by low values of dielectric loss,  ranging between 0.001 and 0.003 and hence very low values of the dissipation factor D (= /) making them applicable in the field of microwave shielding. On the other hand, the dc-conductivity, dc at 25 C shows a remarkable increase by Addition of 1wt% CoFe2O4 to ZnO matrix and decreases gradually with further increase of the ferrite. This indicates the effect of mobility and/or the number density of charge carriers on the conductivity. The investigation at higher temperature, 150 C, shows a gradual decrease in the conductivity with increasing CoFe2O4 content.

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“…Iron particles assume a significant job in the improvement of bone regeneration, especially osteoblastic cell growth 10,11 . Moreover, it was accounted for bioactive material substituted with up to 10% of Fe 2 O 3 , enhanced the apatite shaping ability 12,13 . Such material offers a balance between suitable magnetic properties and biomineralization is necessary for the safe applicability.…”

Section: Introductionmentioning

confidence: 99%

“…10,11 Moreover, it was accounted for bioactive material substituted with up to 10% of Fe 2 O 3 , enhanced the apatite shaping ability. 12,13 Such material offers a balance between suitable magnetic properties and biomineralization is necessary for the safe applicability. The main difference between The aim of the present study was to develop a low-cost wollastonite nano-ceramic by facile wet chemical precipitation method.…”

Section: Introductionmentioning

confidence: 99%

Radiological evaluations of low cost wollastonite nano‐ceramics graft doped with iron oxide in the treatment of induced defects in canine mandible

et al. 2020

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Wollastonite with/without maghemite [(Fe2O3), 0, 3 and 10 wt%] was prepared by facile wet precipitation method. Effect of Fe2O3 presence in the obtained nano‐ceramics on physical structure, morphology, size and the mechanical features was evaluated using X‐ray diffraction, transmission electron microscope, and universal testing machine. Moreover, the in vitro biomineralization was examined using simulated body fluid (SBF) by means of scanning electron microscope/energy dispersive X‐ray, Fourier transform infrared, and inductively coupled plasma. An in vivo study was conducted on 24 adult male mongrel dogs to test the biosafety of fabricated samples in the reconstruction of experimentally induced mandibular bone defects. Bone density was measured through cone beam computed tomography analysis conducted at 1 and 3 months following surgery. Wollastonite was the main phase in all the prepared samples however little maghemite was developed in Fe‐containing samples. No remarkable changes were recognized for physical structure of obtained microcrystalline structures, however, a decrease in particle size was noted in the existence of Fe2O3 (10‐15 nm) when compared to the pure wollastonite (30–50 nm). Mechanical features were dependent on the included Fe2O3 concentration within the wollastonite ceramic matrix. The degree of biomineralization of the samples immersed in SBF was elevated with the increase in Fe2O3 percentage. Clinically, the reconstruction of bone defects was uneventful without any adverse toxic effect. Bone density was significantly increased at 1 and 3 months (p < .001) in grafted defects compared to control ones. Increasing the doping concentrations of iron oxide was associated with significant increase (p < .001) of bone density in all induced defects. Due to the impressive healing effect of current fabricated nano‐ceramics, they are recommended to be utilized as low cost bone graft alternatives.

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Optical and magnetic properties of wollastonite and its nanocomposite crystalline structure with hematite

Cited by 16 publications

References 40 publications

Zinc Oxide Calcium Silicate Composite Attenuates Acute Tramadol Toxicity in Mice

Zinc Oxide Calcium Silicate Composite Attenuates Acute Tramadol Toxicity in Mice

Tailoring ZnO/CoFe₂O₄ nanocomposites: structure, optical, dielectric and magnetic study

Radiological evaluations of low cost wollastonite nano‐ceramics graft doped with iron oxide in the treatment of induced defects in canine mandible

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Optical and magnetic properties of wollastonite and its nanocomposite crystalline structure with hematite

Cited by 16 publications

References 40 publications

Zinc Oxide Calcium Silicate Composite Attenuates Acute Tramadol Toxicity in Mice

Zinc Oxide Calcium Silicate Composite Attenuates Acute Tramadol Toxicity in Mice

Tailoring ZnO/CoFe2O4 nanocomposites: structure, optical, dielectric and magnetic study

Radiological evaluations of low cost wollastonite nano‐ceramics graft doped with iron oxide in the treatment of induced defects in canine mandible

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Tailoring ZnO/CoFe₂O₄ nanocomposites: structure, optical, dielectric and magnetic study