Izvorni znanstveni članak
A Facile Synthesis of Pt Nanoflowers Composed of an Ordered Array of Nanoparticles
Anirban Dandapat
; Nano-Structured Materials Division, CSIR—Central Glass and Ceramic Research Institute, Kolkata, India
Anuradha Mitra
; Nano-Structured Materials Division, CSIR—Central Glass and Ceramic Research Institute, Kolkata, India
Prateek K. Gautam
; Nano-Structured Materials Division, CSIR—Central Glass and Ceramic Research Institute, Kolkata, India; Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, India
Goutam De
; Nano-Structured Materials Division, CSIR—Central Glass and Ceramic Research Institute, Kolkata, India
Sažetak
Platinum nanoflowers (Pt NFs) composed of an ordered assembly of nanoparticles were synthesized by an ethanol reduction of [PtCl6]2– under a reflux condition (85 °C) at pH 2.5 in the presence of PVP (molecular weight 10,000) as a structure‐directing agent. Optical and transmission electron microscopic (TEM) studies confirmed the reduction of [PtCl6]2– into Pt0 followed by its growth to form Pt NPs of a size of ~4 nm, which were then assembled into ordered NFs through epitaxial growth along the (111) plane. The mechanism of the Pt NFs’ formation with respect to the use of PVP of different molecular weights and the pH of the reaction is discussed in detail.
Ključne riječi
platinum (Pt) nanoflower; synthesis; polyvinylpyrrolidone (PVP); ethanol reduction
Hrčak ID:
142695
URI
Datum izdavanja:
1.1.2013.
Posjeta: 988 *