Multifunctional multilayer films containing polyoxometalates and bismuth oxide nanoparticles
| Autor: | Chunxiang Li, Huiyuan Ma, Kevin P. O’Halloran, Shilin Shi |
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| Rok vydání: | 2009 |
| Předmět: |
Materials science
Photoluminescence Inorganic chemistry Oxide Nanoparticle chemistry.chemical_element Tungsten Compounds Catalysis Surfaces Coatings and Films Bismuth chemistry.chemical_compound Photochromism chemistry Chemical engineering Electrochromism Polyoxometalate Materials Chemistry Electrochemistry Nanoparticles Spectrophotometry Ultraviolet Physical and Theoretical Chemistry Cyclic voltammetry |
| Zdroj: | The journal of physical chemistry. B. 113(23) |
| ISSN: | 1520-6106 |
| Popis: | Multifunctional multilayer films consisting of the Keggin-type polyoxometalate [SiW(9)V(3)O(40)](7-) (SiW(9)V(3)) and bismuth oxide nanoparticles (Bi(2)O(3)) were prepared by the layer-by-layer assembly method. For the first time, electrochromic and photochromic studies were done on a film containing both polyoxometalates and nanoparticles. The films were characterized by UV-vis absorption, emission spectra, and atomic force microscopy. Their electrochromic and photochromic properties were investigated by cyclic voltammetry and UV-vis spectroscopy. The results show that the reduction of SiW(9)V(3) is very reversible and tunable with the addition of Bi(2)O(3) layers into the film. The electrocatalytic activity of the films toward oxidation of l-cysteine hydrochloride hydrate (l-cysteine) and reduction of nitrite were studied with cyclic voltammetry. The results show that the incorporation of Bi(2)O(3) nanoparticles into the films changed the films' photoluminescence properties and electrocatalytic efficiency. |
| Databáze: | OpenAIRE |
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