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Transition metal doped Sb@SnO2 nanoparticles for photochemical and electrochemical oxidation of cysteine.

ABSTRACT: Transition metal-doped SnO2 nanoparticles (TM-SnO2) were synthesized by applying a thermos-synthesis method, which first involved doping SnO2 with Sb and then with transition metals (TM = Cr, Mn, Fe, or Co) of various concentrations to enhance a catalytic effect of SnO2. The doped particles were then analyzed by using various surface analysis techniques such as transmission electron microscopy (TEM), X-ray diffraction (XRD), scanning transmission X-ray microscopy (STXM), and high-resolution photoemission spectroscopy (HRPES). We evaluated the catalytic effects of these doped particles on the oxidation of L-cysteine (Cys) in aqueous solution by taking electrochemical measurements and on the photocatalytic oxidation of Cys by using HRPES under UV illumination. Through the spectral analysis, we found that the Cr- and Mn-doped SnO2 nanoparticles exhibit enhanced catalytic activities, which according to the various surface analyses were due to the effects of the sizes of the particles and electronegativity differences between the dopant metal and SnO2.

SUBMITTER: Kim Y

PROVIDER: S-EPMC6098097 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature

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Transition metal doped Sb@SnO2 nanoparticles for photochemical and electrochemical oxidation of cysteine.

Kim Yeonwoo Y Yang Sena S Kang Yeji Y Kim Byung-Kwon BK Lee Hangil H

Scientific reports 20180817 1

Transition metal-doped SnO2 nanoparticles (TM-SnO2) were synthesized by applying a thermos-synthesis method, which first involved doping SnO2 with Sb and then with transition metals (TM = Cr, Mn, Fe, or Co) of various concentrations to enhance a catalytic effect of SnO2. The doped particles were then analyzed by using various surface analysis techniques such as transmission electron microscopy (TEM), X-ray diffraction (XRD), scanning transmission X-ray ...[more]

PMID: 30120377

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Project description:Highlights • The main properties of coordinated magnetic nanoparticles (MNPs) including magnetic moment and saturated magnetisation).• The doping of transition metal ions into ferrite to precisely modulate its magnetic properties.• the potential mechanisms and recent advances in transition metal ion-doped MNPs (TMNPs) for bioimaging: magnetic resonance imaging and magnetic particle imaging and tumour therapy: e.g., magneto-mechanical killing, magnetothermal therapy, and drug delivery.• the current challenges and future trends of TMNPs in the biomedical field based on the latest advances by researchers. Magnetic nanoparticles (MNPs) have been extensively researched and implemented in biomedicine for more than half a century due to their non-invasive nature, ease of temporal and spatial manipulation, and considerable biocompatibility. However, the complex magnetic behaviour of MNPs is influenced by several parameters (e.g., particle size, shape, composition, core-shell structure, etc.), among which the amount of transition metal doping plays an important factor. For this reason, the doping of ferrite with transition metals has been used as an effective strategy to precisely tailor MNPs to achieve satisfactory performance in biomedical applications. In this review, we first introduced the main properties of coordinated MNPs (including magnetic moment and saturated magnetisation) and provide a comprehensive overview of the mechanistic studies related to the doping of transition metal ions into ferrite to precisely modulate its magnetic properties. We also highlighted the potential mechanisms and recent advances in transition metal ion-doped MNPs (TMNPs) for bioimaging (magnetic resonance imaging and magnetic particle imaging) and tumour therapy (e.g., magneto-mechanical killing, magnetothermal therapy, and drug delivery). Finally, we summarised the current challenges and future trends of TMNPs in the biomedical field based on the latest advances by researchers. Graphical abstract Image, graphical abstractTransition metal doped magnetic nanoparticles (TMNPs) for biomedical applications

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Transition metal doped Sb@SnO2 nanoparticles for photochemical and electrochemical oxidation of cysteine.

Publications

Transition metal doped Sb@SnO<sub>2</sub> nanoparticles for photochemical and electrochemical oxidation of cysteine.

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