Hollow CoPt chainlike nanomaterials were synthesized by a galvanic displacement reaction. The morphology, structure, and composition of the nanomaterials were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD) and electron dispersive X-ray (EDX) analysis. It has found that the hollow CoPt chainlike nanoparticles supported on glassy carbon substrate (CoPt/GC) exhibited enhanced electrocatalytic activity toward methanol oxidation in comparison with commercial Pt/C catalyst (Johnson-Matthey, 20 wt% Pt). The studies demonstrated also that the hollow CoPt chainlike nanomaterials possess a superior electrocatalytic property for CO oxidation than that of Pt/C and bulk Pt. The IR properties of the CoPt nanomaterials were investigated by in situ FTIR reflection spectroscopy employing CO adsorption as probe reaction. It has revealed that the hollow CoPt chainlike nanomaterials present abnormal infrared effects (AIREs).
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1166/jnn.2009.se34 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
A novel magnetically guided, oxygen propelled CoPt/Au nanosheet motor in conjugation with a multilayer hollow microcapsule for effective drug delivery and light triggered drug release.
J Mater Chem B
December 2023
Medical Biology Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran.
In recent years, nanomotors have been developed and attracted extensive attention in biomedical applications. In this work, a magnetically-guided oxygen-propelled CoPt/gold nanosheet motor (NSM) was prepared and used as an active self-propelled platform that can load, transfer and control the release of drug carrier to cancer cells. As a drug carrier, the microcapsules were constructed by the layer-by-layer (LbL) coating of chitosan and carboxymethyl cellulose layers, followed by incorporation of gold and magnetite nanoparticles.
View Article and Find Full Text PDFTuning the magnetic anisotropy energy by external electric fields of CoPt dimers deposited on graphene.
Phys Chem Chem Phys
April 2022
Instituto de Física, Universidad Autónoma de San Luis Potosí, 78000 San Luis Potosí, México.
In the framework of first-principles calculations, we comprehensively investigate the external electric-field (EF) manipulation of the magnetic anisotropy energy (MAE) of alloyed CoPt dimers deposited on graphene. In particular, we focus on the possibility of tuning the MAE barriers under the action of external EFs and on the effects of Co-substitution. Among the various considered structures, the lowest-energy configurations were the and , having the Co-atom closest to the graphene layer.
View Article and Find Full Text PDFFerritin: A Multifunctional Nanoplatform for Biological Detection, Imaging Diagnosis, and Drug Delivery.
Acc Chem Res
September 2021
Experimental Center of Advanced Materials, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China.
Ferritins are spherical iron storage proteins within cells that are composed of a combination of 24 subunits of two types, heavy-chain ferritin (HFn) and light-chain ferritin (LFn). They autoassemble naturally into a spherical hollow nanocage with an outer diameter of 12 nm and an interior cavity that is 8 nm in diameter. In recent years, with the constantly emerging safety issues and the concerns about unfavorable uniformity and indefinite behavior of traditional nanomedicines, the characteristics of native ferritin nanocages, such as the unique nanocage structure, excellent safety profile, and definite behavior, make ferritin-based formulations uniquely attractive for nanomedicine development.
View Article and Find Full Text PDFIn Situ SERS Detection of Photocatalytic Degradation of Aminothiophenol on Carbon-Nanotubes/CoPt Hollow Nanoparticles Composite.
Langmuir
September 2019
School of Materials Science and Engineering , Beihang University, Beijing 100083 , China.
The phenol derivatives, as one kind of hormone, are analogous to endocrine disruptors with high carcinogenicity. The photocatalytic technology is an effective approach to mitigate environmental pollution by utilizing solar energy to degrade organic pollutants. In this work, CoPt hollow nanoparticles (NPs) attached to carbon nanotubes (CNTs) are employed to catalytically decompose the -aminothiophenol (PATP) molecules under light irradiation, which is monitored by using surface-enhanced Raman scattering spectra.
View Article and Find Full Text PDFMagnetic field modulated SERS enhancement of CoPt hollow nanoparticles with sizes below 10 nm.
Nanoscale
July 2018
Beijing Advanced Innovation Center of Materials Genome Engineering, and Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China.
It is well known that Pt shows much weaker plasmonic effects in the visible spectrum when compared to Au, Ag and Cu. Therefore, the realization of efficient optical absorption by Pt nanoparticles with sizes below 10 nm in the visible spectrum remains a challenge. One possible way to enhance the optical absorption is to prepare Pt-based bimetallic magnetic nanoparticles.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!