One-step synthesis and stabilization of gold nanoparticles and multilayer film assembly
- College of Chemistry, State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012 (China)
Au nanoparticles (NPs) were synthesized in the one-pot procedure in water at room temperature with the wheel-shaped V{sup V}-V{sup IV} mixed-valence tungstovanadate [P{sub 8}W{sub 48}O{sub 184{l_brace}}V{sub 4}{sup V}V{sub 2}{sup IV}O{sub 12}(H{sub 2}O){sub 2{r_brace}2}]{sup 32-} (V12) acting as both reducing and stabilizing agents. The V12 stabilized Au NPs (Au-V12 NPs) were characterized by SEM, TEM, DLS, UV-vis spectroscopy, XPS, and XRD analyses and the negatively charged surface of the Au-V12 NPs was proved by the zeta potential analysis. Based on the layer-by-layer assembly (LbL), the Au-V12 NPs-containing multilayer films have been fabricated on ITO-coated glass slide and quartz substrates with poly(ethyleneimine) (PEI). The regular growth of the multilayer films was monitored by UV-vis spectroscopy and cyclic voltammetry, the composition was characterized by XPS. The Au-V12 NPs based composite films showed electrocatalytic activities towards the reduction of dioxygen and the oxidation of methanol. This approach is expected to open the way towards procedures aimed at the one-step fabrication of Au NPs and polyoxometalates (POMs) into the multilayer films. -- Graphical abstract: The wheel-shaped V{sup V}-V{sup IV} mixed-valence tungstovanadate [P{sub 8}W{sub 48}O{sub 184{l_brace}}V{sub 4}{sup V}V{sub 2}{sup IV}O{sub 12}(H{sub 2}O){sub 2{r_brace}2}]{sup 32-} (V12) stabilized Au nanoparticles (Au-V12 NPs) have been synthesized and characterized. The multilayer films containing Au-V12 NPs were fabricated and their electrocatalytic properties were studied. Display Omitted Research highlights: {yields} Au core-V12 shell nanostructures, Au-V12 NPs, were synthesized and characterized. {yields} The negatively charged Au NPs were fabricated and catalytic properties were studied. {yields} This study opens the way to the fabrication of multifunctional thin-film materials.
- OSTI ID:
- 21494237
- Journal Information:
- Journal of Solid State Chemistry, Vol. 184, Issue 3; Other Information: DOI: 10.1016/j.jssc.2011.01.011; PII: S0022-4596(11)00012-0; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
FABRICATION
GOLD
LAYERS
NANOSTRUCTURES
OXIDATION
REDUCTION
SCANNING ELECTRON MICROSCOPY
SHELLS
STABILIZATION
SYNTHESIS
TEMPERATURE RANGE 0273-0400 K
THIN FILMS
TUNGSTEN COMPOUNDS
VANADATES
VOLTAMETRY
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY
CHEMICAL REACTIONS
COHERENT SCATTERING
DIFFRACTION
ELECTRON MICROSCOPY
ELECTRON SPECTROSCOPY
ELEMENTS
FILMS
METALS
MICROSCOPY
OXYGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
REFRACTORY METAL COMPOUNDS
SCATTERING
SPECTROSCOPY
TEMPERATURE RANGE
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
VANADIUM COMPOUNDS