Synthesis, characterization and magnetic properties of polymer–Fe3O4 nanocomposite

Rodriguez, Anselmo Fortunato Ruiz; Coaquira, J. A. H.; Morales, Marco A.; Faria, Fernando Sérgio Escócio Drummond Viana de; Cunha, Renildo Moura da; Santos, J. G.; Silveira, L. B.; Candela, D.; Baggio-Saitovitch, E.; Rabelo, D.; Azevedo, Ricardo Bentes; Morais, P.C.

doi:10.1016/j.saa.2012.02.081

Cited by 15 publications

(8 citation statements)

References 9 publications

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“…The improvement of photocatalytic efficiency with the increase of the BiOBr/ZnO/WO 3 photocatalyst dose may be attributed to the fact that the increase of the photocatalyst’s available surface area and the creation of more OH radicals at the active sites would be sufficient to degrade and mineralize the organic pollutant. 31 , 35 , 37 …”

Section: Resultsmentioning

confidence: 99%

Ternary Photodegradable Nanocomposite (BiOBr/ZnO/WO₃) for the Degradation of Phenol Pollutants: Optimization and Experimental Design

Ali

Motawea

2021

ACS Omega

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The degradation of environmental contaminants with photocatalysts has bright prospects for application in the control of pollution. In this study, BiOBr/ZnO/WO 3 heterojunctions have been documented to be reliable visible-light photocatalysts for phenol deterioration. X-ray diffraction, X-ray photoelectron spectroscopy, Fourier-transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, photoluminescence spectral analysis, electrochemical impedance spectroscopy (EIS), EIS Bode plots, linear sweep voltammetry, and UV–visible diffuse reflectance spectroscopy were employed to describe the heterojunction’s structure in addition to its optical features. The results revealed that the BiOBr/ZnO/WO 3 ternary photocatalyst displayed more degradation activity in comparison to single-phase ZnO, WO 3 , or BiOBr, which is also higher than that of binary mixture photocatalysts with a phenol degradation efficiency of 90%. The influence of degradation variables, for instance, the potential of hydrogen (pH) and the initial organic contaminant content besides the heterojunction dose, on the deterioration efficiency was optimized using the response surface methodology. The degradation efficiency reached 95% under the optimal conditions of 0.08 g/0.03 L catalyst dose, a pH of 9, and an initial organic contaminant content of 10 mg L –1 . However, the optimal phenol degradation efficiency of 39.37 mg g –1 was achieved under the conditions of 0.08 g/0.03 L catalyst dose, pH of 9, and 200 mg L –1 initial phenol concentration.

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Section: Resultsmentioning

confidence: 99%

Ternary Photodegradable Nanocomposite (BiOBr/ZnO/WO₃) for the Degradation of Phenol Pollutants: Optimization and Experimental Design

Ali

Motawea

2021

ACS Omega

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“…Furthermore, even though the detected minerals were known as white or clear colors, iron oxides-mineralogical factors that induce brownish or blackish colors-were not detected among the soil component materials [6][7][8][9][12][13][14][15][16][17][18][19][20][21][50][51][52]. In particular, the iron oxides in the soil exist as nano-sized particles that cover individual soil particles and have low crystallinity-they are almost amorphous in nature [53][54][55][56][57][58][59]. To identify such minerals, sorted specimens-prepared by separating and collecting clay particles with a relatively high proportion of iron oxides-must be analyzed.…”

Section: Clay Particle Xrd and Firing Parametersmentioning

confidence: 99%

X-ray Diffraction Analysis of Clay Particles in Ancient Baekje Black Pottery: Indicator of the Firing Parameters

et al. 2021

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An X-ray diffraction (XRD) analysis was conducted after separating clay particles from three shards, to analyze the production technique of black pottery excavated from a historical site of ancient Baekje in Seoul, South Korea. Through the analysis, clay minerals and iron oxides that were not recognized in the XRD patterns of the bulk powder samples were identified. A pottery type with a blackened portion from the surface to the margin and the core was estimated to have been produced in a reduction firing environment of less than 900 °C, by detecting illite and magnetite. As for the other blackened pottery, a brown soil color remained in the core, and the presence of illite and kaolin was confirmed. In addition, while magnetite was detected on the black surface and margin, hematite was detected in the core. These results confirm that this type of blackened pottery was produced through reduction firing at a temperature below 550 °C. In particular, the results indicate that there is a new category of pottery, produced by firing at lower temperatures in a reduction atmosphere, previously not reported by research on ancient Baekje black pottery, which could be discovered due to its specific clay particles.

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“…Aiming different applications one pot or in situ [90][91][92][93] as well as ex situ [94][95][96][97][98] approaches for nanoencapsulation can be realized, meaning the strategy of nanoparticle's synthesis simultaneously with the hosting template (one pot) or within the reactive hosting template (in situ)…”

Section: Thermoresponsive Drug Delivery Systemsmentioning

confidence: 99%

Remote Hyperthermia, Drug Delivery and Thermometry: The Multifunctional Platform Provided by Nanoparticles

Qi¹,

Morais

2014

J Nanomed Nanotechno

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The huge demand for biocompatible, robust, accurate and noninvasive technology to assess the temperature of a biological targeted site for monitoring the hyperthermia effect brings the topic of remote thermometry to a very high level of interest. There are already promising research directions to fulfil such demand in the short term and a review of the achievements in this issue is certainly worth. This report offers an overview of the research regarding the most promising nanothermometers nowadays, with emphasis on those addressed to remote operation while using optical or magnetic responses of nanosized materials as the thermometric property. More specifically the optical emission intensity, optical emission peak shift and optical emission lifetime will be covered as far as the optical-based nanothermometers are concerned. Additionally, for the magnetic-based nanothermometers the magnetization or the magnetic susceptibility are the thermometric properties covered in this review. Furthermore, the review includes the hyperthermia effect based on nanosized metallic or magnetic particles plus a couple of thermally-responsive polymeric drug delivery systems, aiming to provide an integrated view of the multipurpose platform offered by actuating-sensing nanoparticles. As far as the regulatory system is concerned the availability of noninvasive thermometry incorporating biocompatibility, robustness and accuracy will establish the grounds needed for the approval of the hyperthermia technology for therapeutic purposes, thus allowing the market of this technological option on a global scale.hyperthermia and thermoresponsive drug delivery systems for clinical use.Although nanothermometry is at its infancy considerable progress has been made recently in regard to its use for remote assessing the temperature at the site the nanomaterials are incorporated to. Nanoprobes allowing remote temperature-sensing using optical or magnetic properties are among the most promising directions nowadays. Most of the optical-based nanothermometers use the light-emitting intensity [15][16][17][18][19][20][21][22][23], light-emitting peak shift [24][25][26], or lifetime decay of a suitable optical band as the thermometric property [27][28][29][30]. As far as the clinical use is concerned the drawbacks of the actual optical-based nanothermometers rely on biocompatibility (usual semiconductor-based core nanoprobes or dye-based shell moieties are toxic), robustness (typical bleaching of organic-based shell moieties) or temperature accuracy (no better than 0.3°C nowadays), or even combination of these factors. Moreover, due to limitations imposed by living tissues on the optical penetration of light (optical therapeutic window in the 700-1100 nm wavelength range), noninvasive clinical use of optical excitation and signal pickup is a huge challenge, not yet solved, except for very special therapeutic applications, as for instance the photodynamic therapy for treatment (heating monitoring) of skin cancer and follow up [31]. Alternatively, ...

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Synthesis, characterization and magnetic properties of polymer–Fe3O4 nanocomposite

Cited by 15 publications

References 9 publications

Ternary Photodegradable Nanocomposite (BiOBr/ZnO/WO₃) for the Degradation of Phenol Pollutants: Optimization and Experimental Design

Ternary Photodegradable Nanocomposite (BiOBr/ZnO/WO₃) for the Degradation of Phenol Pollutants: Optimization and Experimental Design

X-ray Diffraction Analysis of Clay Particles in Ancient Baekje Black Pottery: Indicator of the Firing Parameters

Remote Hyperthermia, Drug Delivery and Thermometry: The Multifunctional Platform Provided by Nanoparticles

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Synthesis, characterization and magnetic properties of polymer–Fe3O4 nanocomposite

Cited by 15 publications

References 9 publications

Ternary Photodegradable Nanocomposite (BiOBr/ZnO/WO3) for the Degradation of Phenol Pollutants: Optimization and Experimental Design

Ternary Photodegradable Nanocomposite (BiOBr/ZnO/WO3) for the Degradation of Phenol Pollutants: Optimization and Experimental Design

X-ray Diffraction Analysis of Clay Particles in Ancient Baekje Black Pottery: Indicator of the Firing Parameters

Remote Hyperthermia, Drug Delivery and Thermometry: The Multifunctional Platform Provided by Nanoparticles

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Product

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About

Ternary Photodegradable Nanocomposite (BiOBr/ZnO/WO₃) for the Degradation of Phenol Pollutants: Optimization and Experimental Design

Ternary Photodegradable Nanocomposite (BiOBr/ZnO/WO₃) for the Degradation of Phenol Pollutants: Optimization and Experimental Design