Influence of zinc acetate content on the photoelectrochemical performance of zinc oxide nanostructures fabricated by electrospinning technique
| Autor: | Rodríguez, Juan, Ramos, Pierre G., Hojamberdiev, Mirabbos, Morales, Noé J., Candal, Roberto J. |
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| Rok vydání: | 2016 |
| Předmět: |
Photoelectrochemical performance
ZnO nanoparticles Efficiency 02 engineering and technology 01 natural sciences Nanocomposites Electrochemistry Charge transfer efficiency One-dimensional nanostructure Poly (vinyl alcohol) (PVA) Electrospinning techniques Tin oxides 021001 nanoscience & nanotechnology Chlorine compounds Electrospinning Electronic Optical and Magnetic Materials Solutions Photocatalysis 0210 nano-technology Biotechnology Materials science Nanostructure chemistry.chemical_element Nanotechnology Zinc 010402 general chemistry Zinc sulfide Fabrication Charge transfer Zinc oxide High surface area Doping (additives) Light absorption Electrical and Electronic Engineering Electrodes Substrates Crystal structure Zinc oxide (ZnO) nanostructures II-VI semiconductors Silver halides Nanostructures 0104 chemical sciences Fiber precursor chemistry Surface-area-to-volume ratio Polyvinyl acetates Ceramics and Composites Zinc acetate Incident photon-to-current efficiencies |
| Zdroj: | CONCYTEC-Institucional Consejo Nacional de Ciencia Tecnología e Innovación Tecnológica instacron:CONCYTEC Universidad Nacional de Ingeniería Repositorio Institucional-UNI UNI-Tesis instacron:UNI |
| ISSN: | 1847-9804 |
| Popis: | One-dimensional nanostructures have shown high photocatalytic efficiency due to their high surface area to volume ratio and charge transfer efficiency. In this work, we have studied the influence of zinc acetate content (zinc acetate to polyvinyl alcohol (PVA)mass ratio) on the photoelectrochemical performance of zinc oxide (ZnO) nanostructures. The nanostructures of ZnO were fabricated on fluorine-doped tinoxide glass substrate by electrospinningof aqueous solution containing different amounts of zinc acetate. The precursor nanofibers of zinc acetate/PVA were converted into polycrystalline ZnO nanostructures with hexagonal wurtzite crystal structure by calcination at 600 C for 3 h. Itwas found that by increasing the amount of zinc acetate, the diameter of the as-spun precursor fibers increased and their distribution became broader. The mean diameter of the ZnO nanoparticles forming the nanostructures ranged from 45 to 80 nm by increasing the amount of zinc acetate. The incident photon to current efficiency (IPCE) spectra of the ZnO nanostructures were measured in a three-electrode cell, using a platinum wire as a counterelectrode and silver/silver chloride as a reference electrode. The ZnO nanostructures fabricated with zinc acetate to PVA ratios of 2:3 and 1:1 exhibited approximately 31% and 28% IPCE, respectively, at about 350 nm compared with theZnOnanostructures fabricated with zinc acetate to PVAratios of 1:2 (7%) and 3:2 (4%) due to the increased number of nanostructures, resulting in the enhancement of light absorption and electron transfer rate. |
| Databáze: | OpenAIRE |
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