Electrodeposited Polyaniline in a Nanoporous WO3 Matrix: An Organic/Inorganic Hybrid Exhibiting Both p- and n-Type Photoelectrochemical Activity
| Autor: | Norma R. de Tacconi, Krishnan Rajeshwar, Wilaiwan Chanmanee, Csaba Janáky |
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| Rok vydání: | 2012 |
| Předmět: |
Conductive polymer
Materials science Anodizing Nanoporous Inorganic chemistry 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Tungsten trioxide 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound symbols.namesake General Energy X-ray photoelectron spectroscopy chemistry Polyaniline symbols Physical and Theoretical Chemistry Cyclic voltammetry 0210 nano-technology Raman spectroscopy |
| Zdroj: | The Journal of Physical Chemistry C. 116:4234-4242 |
| ISSN: | 1932-7455 1932-7447 |
| Popis: | This study focuses on the electrodeposition of a conducting polymer such as polyaniline (PANI) into a tungsten trioxide nanoporous host framework. Nanoporous WO3 films were initially electrosynthesized on tungsten foil by anodization at different voltages in a fluoride-containing medium. The PANI layer was electrografted onto the entire surface of the WO3 using potentiodynamic electrodeposition in sulfuric acid electrolyte. The morphological features of oligomer/polymer formed in the nanoporous oxide template were monitored by field-emission scanning electron microscopy. Systematic changes in the morphology afforded insights into the evolution of the WO3/PANI hybrid assembly. This assembly was subsequently characterized by Raman spectroscopy, X-ray photoelectron spectroscopy, cyclic voltammetry, and photoelectrochemical measurements. Photovoltammetric data indicated the complex behavior of the hybrid, featuring the properties of both of its components: namely, p-type behavior in the cathodic polarization ... |
| Databáze: | OpenAIRE |
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