Preparation of Pt-loaded TiO2 nanofibers by electrospinning and their application for WGS reactions

Kim, Hyeonjae; Choi, Yeongsoo; Kanuka, Nariyasu; Kinoshita, Hironori; Nishiyama, Takahito; Usami, Tsutomu

doi:10.1016/j.apcata.2008.10.016

Cited by 30 publications

(15 citation statements)

References 20 publications

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“…However, heterogeneous nanofibers with a little spindle beads were achieved when the polymer concentration is further increased to 5.0 wt%, because the dominating viscoelastic force will break the force balance and lead to the instability of Taylor cone, which dedicate to the increase of heterogeneity of fibers [44,46]. The average diameter of nanofibers increased with the polymer concentration increased from 4.5 wt% to 5 wt%, which is possibly attributed to that the fibers made from solution of higher polymer concentration own less solvent to evaporate during electrospinning process, which result in less reduction of mass loss [47].…”

Section: Discussionmentioning

confidence: 98%

Magnetic biodegradable Fe₃O₄/CS/PVA nanofibrous membranes for bone regeneration

et al. 2011

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In recent years, interest in magnetic biomimetic scaffolds for tissue engineering has increased considerably. The aim of this study is to develop magnetic biodegradable fibrous materials with potential use in bone regeneration. Magnetic biodegradable Fe(3)O(4)/chitosan (CS)/poly vinyl alcohol (PVA) nanofibrous membranes were achieved by electrospinning with average fiber diameters ranging from 230 to 380 nm and porosity of 83.9-85.1%. The influences of polymer concentration, applied voltage and Fe(3)O(4) nanoparticles loading on the fabrication of nanofibers were investigated. The polymer concentration of 4.5 wt%, applied voltage of 20 kV and Fe(3)O(4) nanoparticles loading of lower than 5 wt% could produce homogeneous, smooth and continuous Fe(3)O(4)/CS/PVA nanofibrous membranes. X-ray diffraction (XRD) data confirmed that the crystalline structure of the Fe(3)O(4), CS and PVA were maintained during electrospinning process. Fourier transform infrared spectroscopy (FT-IR) demonstrated that the Fe(3)O(4) loading up to 5 wt% did not change the functional groups of CS/PVA greatly. Transmission electron microscopy (TEM) showed islets of Fe(3)O(4) nanoparticles evenly distributed in the fibers. Weak ferrimagnetic behaviors of membranes were revealed by vibrating sample magnetometer (VSM) test. Tensile test exhibited Young's modulus of membranes that were gradually enhanced with the increase of Fe(3)O(4) nanoparticles loading, while ultimate tensile stress and ultimate strain were slightly reduced by Fe(3)O(4) nanoparticles loading of 5%. Additionally, MG63 human osteoblast-like cells were seeded on the magnetic nanofibrous membranes to evaluate their bone biocompatibility. Cell growth dynamics according to MTT assay and scanning electron microscopy (SEM) observation exhibited good cell adhesion and proliferation, suggesting that this magnetic biodegradable Fe(3)O(4)/CS/PVA nanofibrous membranes can be one of promising biomaterials for facilitation of osteogenesis.

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Section: Discussionmentioning

confidence: 98%

Magnetic biodegradable Fe₃O₄/CS/PVA nanofibrous membranes for bone regeneration

et al. 2011

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“…Electrospinning of nanofibers can be utilized for a variety of applications, e.g., filtration, tissue engineering scaffolds, wound healing, drug release control, and energy storage [21,22]. Catalyzed TiO 2 nanofibers were also proposed for utilization in heterogeneous catalysis, e.g., for the water gas shift reaction [23].…”

Section: Introductionmentioning

confidence: 99%

Pt nanoparticles deposited on TiO2 based nanofibers: Electrochemical stability and oxygen reduction activity

Bauer

Lee

Song

et al. 2010

Journal of Power Sources

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This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues.Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. The electrochemical stability of Pt deposited on TiO 2 based nanofibers was compared with commercially available carbon supported Pt. Prior to the Pt deposition the TiO 2 material, which was either undoped or Nb doped, was air calcined. In one case the undoped TiO 2 was also reduced in a hydrogen atmosphere. XRD analysis revealed that the unreduced TiO 2 was present in the anatase phase, irrespective of whether the Nb dopant was present, whereas the rutile phase was formed due to reduction with H 2 . The diameter of the TiO 2 fibers varied from 50 to 100 nm, and the average Pt particle diameter was approximately 5 nm. Pt supported on TiO 2 was more stable than Pt supported on C when subjected to 1000 voltammetric cycles in the range of 0.05-1.3 V vs. RHE. Nb doped TiO 2 showed the highest stability, retaining 60% of the electrochemically active surface area after 1000 cycles compared to the state after 100 cycles, whereas the carbon supported catalyst retained 20% of the active surface area. The commercial catalyst had the highest oxygen reduction activity due to its larger specific area (17.1 m 2 g −1 vs. 5.0 m 2 g −1 for Pt/TiO 2 -Nb, measured after 100 cycles) and the higher support conductivity. The Pt supported on Nb doped or on H 2 reduced TiO 2 was more active than Pt supported on air calcined and otherwise unmodified TiO 2 .Crown

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“…4 6 The uses and performances for a given application are, however, strongly influenced by the crystalline structure, the morphology and the size of the particles. [8][9][10] Indeed, as for many other oxides, nano-sized TiO 2 particles are of particular interest because of their specifically size-related properties. Thus, it is important to develop synthesis methods in which the size, morphology, and the structure of nano TiO 2 could be controlled.…”

Section: Introductionmentioning

confidence: 99%

One Step Synthesis of Rutile TiO₂ Nanoparticles at Low Temperature

Anwar¹,

Kumar²,

Arshi³

et al. 2012

j nanosci nanotechnol

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Sphere-like rutile TiO2 nanocrystals have been synthesized by sol-gel method followed by hydrolysis of titanium tetrachloride in deionized water in the presence of ammonium hydroxide as hydrolysis catalyst. The as-prepared TiO2 nanoparticles have single rutile phase with average diameter approximately 26.4 nm. The results show that the temperature has a great influence on the particle size distribution and also crystalline phase (rutile) of TiO2 nanoparticles is consistent with the temperature. Characterization of the as-prepared nanocrystalline powder was carried out by different techniques such as powder X-ray diffraction (XRD), field emission transmission electron microscopy (FE-TEM) and Raman spectroscopy.

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Preparation of Pt-loaded TiO2 nanofibers by electrospinning and their application for WGS reactions

Cited by 30 publications

References 20 publications

Magnetic biodegradable Fe₃O₄/CS/PVA nanofibrous membranes for bone regeneration

Magnetic biodegradable Fe₃O₄/CS/PVA nanofibrous membranes for bone regeneration

Pt nanoparticles deposited on TiO2 based nanofibers: Electrochemical stability and oxygen reduction activity

One Step Synthesis of Rutile TiO₂ Nanoparticles at Low Temperature

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Preparation of Pt-loaded TiO2 nanofibers by electrospinning and their application for WGS reactions

Cited by 30 publications

References 20 publications

Magnetic biodegradable Fe3O4/CS/PVA nanofibrous membranes for bone regeneration

Magnetic biodegradable Fe3O4/CS/PVA nanofibrous membranes for bone regeneration

Pt nanoparticles deposited on TiO2 based nanofibers: Electrochemical stability and oxygen reduction activity

One Step Synthesis of Rutile TiO2 Nanoparticles at Low Temperature

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Magnetic biodegradable Fe₃O₄/CS/PVA nanofibrous membranes for bone regeneration

Magnetic biodegradable Fe₃O₄/CS/PVA nanofibrous membranes for bone regeneration

One Step Synthesis of Rutile TiO₂ Nanoparticles at Low Temperature