The effects of cerium doping on the size, morphology, and optical properties of α-hematite nanoparticles for ultraviolet filtration

Cardillo, Dean; Konstantinov, Konstantin; Devers, Thierry

doi:10.1016/j.materresbull.2013.07.036

Cited by 20 publications

(8 citation statements)

References 22 publications

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“…The unique properties of nanostructured materials have led to increasing interest and application in industry, medicine, and consumer products. Metal oxide nanoparticles have been investigated for use in a range of different fields including catalysis, , energy storage, − gas sensing, , biomedical, − and cosmetic , applications. The same nanosized features that give these particles their unique properties can also affect their biological activity.…”

Section: Introductionmentioning

confidence: 99%

“…They are shown to be present in these samples through X-ray photoelectron spectroscopy (XPS) and Raman characterization. Insight into controlling the free radical behavior and cytotoxicity of such particles is of concern due to the interest in application of these particles in catalysis , and cosmetics. , The cytoxicity of such hematite nanoparticles has been featured in a number of studies, which often report the induction of oxidative stress , through the generation of free radical species through Fenton-like reactions. This is because the bandgap of this material is ideal for the decomposition of H 2 O 2 into the more harmful OH · radical species .…”

Section: Introductionmentioning

confidence: 99%

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Synthesis-Dependent Surface Defects and Morphology of Hematite Nanoparticles and Their Effect on Cytotoxicity in Vitro

Cardillo¹,

Tehei²,

Hossain³

et al. 2016

ACS Appl. Mater. Interfaces

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In this study, we investigate the toxicity of hematite (α-Fe 2 O 3 ) nanoparticles on the Madin-Darby Canine Kidney (MDCK) cell line. The oxide particles have been synthesized through two different methods and annealing conditions. These two methods, spray precipitation and precipitation, resulted in particles with rod-like and spherical morphology and feature different particle sizes, surface features, and magnetic properties. Through flow cytometry it was found that particle morphology heavily influences the degree to which the nanomaterials are internalized into the cells. It was also found that the ability of the nanoparticles to generate free radicals species is hindered by the formation of tetrahedrally coordinated maghemite-like (γ-Fe 2 O 3 ) spinel defects on the surfaces of the particles. The combination of these two factors resulted in variable cytotoxic effects of the hematite nanoparticles synthesized with different conditions. This article highlights the importance on the fabrication method, materials properties, and surface characteristics on the cytotoxicity of hematite nanomaterials.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis-Dependent Surface Defects and Morphology of Hematite Nanoparticles and Their Effect on Cytotoxicity in Vitro

Cardillo¹,

Tehei²,

Hossain³

et al. 2016

ACS Appl. Mater. Interfaces

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“…In addition, the Scientific Committee for Consumer Safety (SCCS) recommended avoiding the use of photocatalytically active TiO2 in sunscreen and cosmetic products [38]. Among the materials examined as an alternative; there are metal oxide nanoparticles containing ceria (CeO2) [39][40][41][42][43][44][45], tin oxide (SnO2) [46], iron oxide (Fe2O3) [47][48].…”

Section: Sun Protection Factor (Spf) Of Bb@fe Nanoparticlesmentioning

confidence: 99%

Biosynthesis, Characterization and Determination of Sun Protection Factor (Spf) of Iron Nanoparticles With Bee Bread

Bildir

DEMİRKAN

Kaya

2022

Türk Doğa Ve Fen Dergisi

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Bee bread is a food product obtained by fermenting bee pollen with honey and storing it in honeycomb cells. In this fermentation, phenolic compounds remain unaffected and unchanged. Bee bread contains approximately; there are 35% sugar, 24-35% carbohydrate, 20-22% protein, 3.5% lactic acid, 2.43% mineral, 1.6% lipid and 1.6% fat. Within the scope of the study, biocompatible iron nanoparticles were synthesized (BB@FeNPs) by utilizing the potential reducing powers of these components contained in bee bread. Characterization of obtained bee bread-based nanoparticles; were performed using spectroscopic techniques such as ultraviolet-visible light spectrophotometer, fourier transform infrared spectrophotometer, and x-ray diffraction spectrometry. Scanning electron microscopy was used as a microscopic method in the characterization of nanoparticles. In addition, the sun protection factor (SPF) of the synthesized nanoparticles was determined by ultraviolet spectrophotometry. Although the studies in recent years tend to search for bioactive molecules of natural origin, no nanoparticle synthesis with bee bread has been encountered in the literature. This study is important as it is a first in the synthesis of metal nanoparticles with bee bread.

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“…[ 12,13 ] To this end, solution‐based thermal decomposition offers powerful opportunities to construct nano‐catalysts with well‐controlled morphologies and sizes, in a “bottom‐up” manner. [ 14–16 ] Nevertheless, when incorporating a dopant precursor into a known host synthetic system, the morphology of the resultant product often changes drastically compared to its host counterparts, [ 17–20 ] and severe phase separation may even occur, due to the more complex thermodynamically controlled process. [ 21–23 ] This poses a huge challenge in using a solution‐based strategy for well‐defined single‐atom catalysts with both surface and volumetric atomic doping, as well as maintaining the nanoscale structure.…”

Section: Introductionmentioning

confidence: 99%

Spontaneous Atomic Sites Formation in Wurtzite CoO Nanorods for Robust CO₂ Photoreduction

Wei

Fan

et al. 2021

Adv Funct Materials

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Controlled incorporation of single atoms in a suitable host matrix can result in a radical transformation in catalytic properties. However, finding a straightforward synthetic strategy that offers a compelling combination of solution processing, atomic doping and a matching host is still a grand challenge. Here, a spontaneous heteroatom formation of atomic Zn sites in well-defined wurtzite CoO nanorods, delivering high photoreduction rates, reaching 86.7 µmol g −1 h −1 for CO and 31.4 µmol g −1 h −1 for CH 4 production is reported. Based on the validation of atomic Zn sites structures, catalytic process tracking via in situ/ex situ spectroscopic probes, and related structural simulations, a good description of the catalytic reaction kinetics for Zn/CoO as a function of applied potential is established, revealing how the single doping sites influence the CO 2 photoreduction.

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The effects of cerium doping on the size, morphology, and optical properties of α-hematite nanoparticles for ultraviolet filtration

Cited by 20 publications

References 22 publications

Synthesis-Dependent Surface Defects and Morphology of Hematite Nanoparticles and Their Effect on Cytotoxicity in Vitro

Synthesis-Dependent Surface Defects and Morphology of Hematite Nanoparticles and Their Effect on Cytotoxicity in Vitro

Biosynthesis, Characterization and Determination of Sun Protection Factor (Spf) of Iron Nanoparticles With Bee Bread

Spontaneous Atomic Sites Formation in Wurtzite CoO Nanorods for Robust CO₂ Photoreduction

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The effects of cerium doping on the size, morphology, and optical properties of α-hematite nanoparticles for ultraviolet filtration

Cited by 20 publications

References 22 publications

Synthesis-Dependent Surface Defects and Morphology of Hematite Nanoparticles and Their Effect on Cytotoxicity in Vitro

Synthesis-Dependent Surface Defects and Morphology of Hematite Nanoparticles and Their Effect on Cytotoxicity in Vitro

Biosynthesis, Characterization and Determination of Sun Protection Factor (Spf) of Iron Nanoparticles With Bee Bread

Spontaneous Atomic Sites Formation in Wurtzite CoO Nanorods for Robust CO2 Photoreduction

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Product

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Spontaneous Atomic Sites Formation in Wurtzite CoO Nanorods for Robust CO₂ Photoreduction