Synthesis of Platinum Nanoparticles by Reductive Crystallization Using Polyethyleneimine

Nagao, Hideyuki; Ichiji, Masumi; Hirasawa, Izumi

doi:10.1002/ceat.201600656

Cited by 25 publications

(6 citation statements)

References 22 publications

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“…The most common routes for synthesis of PtNPs in colloidal suspension is through chemical reduction 21 , microemulsions 22 , green synthesis 23 and gamma irradiation 24 by the reduction of precursors, such as Pt 4 + or Pt 2 + ions in the presence of coating agent. In order to control size and morphology, polyacrylate and polyvinylpyrrolidone were used 25 ; however, the use of NaBH4 is related as a faster reducing agent employed for the synthesis and control of size 26 .…”

Section: Introductionmentioning

confidence: 99%

Antioxidative activity of gold and platinum nanoparticles assessed through electron spin resonance

et al. 2021

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Gold nanoparticle (AuNP) is a well-known biocompatible structure with several biomedical applications for labeling, heating, and sensing, besides delivery of drugs to cells. Similarly, platinum nanoparticles (PtNPs) have important applications in medicine. Traditional applications of these nanoparticles in medicine/biomedicine depend on their physical-chemical properties. In this work, a preliminary study of the antioxidative properties of AuNP and PtNP was performed using electron spin resonance (ESR) spectroscopy. Antioxidant activity against DPPH (1,1-diphenyl-2-picrylhydrazyl) radical was found for both nanoparticles, but the PtNP was more reactive than the AuNP to reduce the DPPH ESR signal. The decay time for the signal intensity was T = 3.1 � 0.1 min�1 for AuNP and T = 1.80 � 0.07 min�1 for PtNP.

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Section: Introductionmentioning

confidence: 99%

Antioxidative activity of gold and platinum nanoparticles assessed through electron spin resonance

et al. 2021

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“…The higher amount of catalytic center could lead to the higher catalytic oxidation of TMB and obvious change. Pt NPs (12.9–70.7 nm) have been successfully prepared by PEI molecules with molecular weights from 300, 1200, and 10,000 . However, the sizes of aforementioned Pt NPs are relatively big, and the stability of prepared NPs is not investigated.…”

Section: Introductionmentioning

confidence: 99%

“…Pt NPs (12.9−70.7 nm) have been successfully prepared by PEI molecules with molecular weights from 300, 1200, and 10,000. 30 However, the sizes of aforementioned Pt NPs are relatively big, and the stability of prepared NPs is not investigated. Thus, it is still necessary to obtain smaller Pt NPs with high stability in solution.…”

Section: Introductionmentioning

confidence: 99%

Polyethyleneimine-Stabilized Platinum Nanoparticles as Peroxidase Mimic for Colorimetric Detection of Glucose

et al. 2020

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Colorimetric detection of glucose using enzyme-mimic nanoparticles (NPs) has been drawing great attention. However, many NPs lack good stability in solution, which results in reduced color change of substrates in colorimetric detection. Liner soluble macromolecules with high cationic density may be suitable candidates for the stabilization of NPs. Herein, we prepared polyethyleneimine-stabilized platinum NPs (Pt n -PEI NPs) for colorimetric detection of glucose. The platinum NPs (Pt NPs) used in this system had small size (from 3.21 to 3.70 nm) and narrow size distribution. Pt50-PEI NPs had high stability within one week with a hydrodynamic size of ∼25 nm and slightly positive zeta potential. Pt50-PEI NPs-catalyzed oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) in the presence of H2O2, generating blue oxidized TMB (oxTMB), which indicated the peroxidase-like property of Pt50-PEI NPs. The optimal condition for this reaction was pH = 4.0 at 30 °C. More importantly, Pt50-PEI NPs were successfully used to detect glucose concentration by a colorimetric method with high selectivity. The established method had a linear concentration range from 10 to 5000 μM with a detection limit of 4.2 μM. For example, the concentration of glucose in saliva was tested to be 0.15 mM using our method. The high stability of Pt50-PEI NPs enhanced the high accessibility of the active center of Pt NPs for substrates and consequent excellent catalytic property. This established method has great potential to be used in various applications for glucose detection in the future.

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“…These methods rely on generation of reactive oxygen and nitrogen species (RONS), solvated electrons, as well as UV radiation and heat. All these factors facilitate formation of NPs through reduction of metallic precursor compounds, eliminating the need for additional reducing agents, such as hydrazine [ 13 ] or sodium borohydrate [ 14 ]. To the best of our knowledge, only a few research groups have attempted to synthesize PtNPs by APP [ 15 , 16 , 17 , 18 , 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Atmospheric Pressure Plasma-Mediated Synthesis of Platinum Nanoparticles Stabilized by Poly(vinylpyrrolidone) with Application in Heat Management Systems for Internal Combustion Chambers

et al. 2018

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Poly(vinylpyrrolidone)-stabilized Pt nanoparticles (PVP-PtNPs) were produced in a continuous-flow reaction-discharge system by application of direct current atmospheric pressure glow discharge (dc-APGD) operated between the surface of a flowing liquid anode (FLA) and a pin-type tungsten cathode. Synthesized PVP-PtNPs exhibited absorption across the entire UV/Vis region. The morphology and elemental composition of PVP-PtNPs were determined with transmission electron microscopy (TEM) and energy dispersive X-ray scattering (EDX), respectively. As assessed by TEM, PVP-PtNPs were approximately spherical in shape, with an average size of 2.9 ± 0.6 nm. EDX proved the presence of Pt, C, and O. Dynamic light scattering (DLS) and attenuated total reflectance Fourier transform-infrared spectroscopy (ATR FT-IR) confirmed PtNPs functionalization with PVP. As determined by DLS, the average size of PtNPs stabilized by PVP was 111.4 ± 22.6 nm. A fluid containing resultant PVP-PtNPs was used as a heat conductive layer for a spiral radiator managing heat generated by a simulated internal combustion chamber. As compared to water, the use of PVP-PtNPs enhanced efficiency of the system, increasing the rate of heat transfer by 80% and 30% during heating and cooling, respectively.

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Synthesis of Platinum Nanoparticles by Reductive Crystallization Using Polyethyleneimine

Cited by 25 publications

References 22 publications

Antioxidative activity of gold and platinum nanoparticles assessed through electron spin resonance

Antioxidative activity of gold and platinum nanoparticles assessed through electron spin resonance

Polyethyleneimine-Stabilized Platinum Nanoparticles as Peroxidase Mimic for Colorimetric Detection of Glucose

Atmospheric Pressure Plasma-Mediated Synthesis of Platinum Nanoparticles Stabilized by Poly(vinylpyrrolidone) with Application in Heat Management Systems for Internal Combustion Chambers

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