Bio-Photovoltaic Conversion Device Made from Chitosan Nanofibers and Varieties of Natural Pigments
| Autor: | Siriwat BOONCHAISRI, Niyom HONGSIT |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Walailak Journal of Science and Technology, Vol 11, Iss 5 (2014) |
| Druh dokumentu: | article |
| ISSN: | 1686-3933 2228-835X |
| DOI: | 10.2004/wjst.v11i5.794 |
| Popis: | In this study, the natural pigments anthocyanin, beta carotene, chlorophyll, and curcumin, extracted from red cabbage, carrot, water hyacinth and turmeric, respectively, were used as sensitized dyes in a Bio-photovoltaic Conversion Device (BPV), and the energy conversion efficiencies (h) were compared. The photoelectrodes were designed to use various photoactive layers made of porous TiO2 or a new TiO2:nanofiber interface. The nanofibers were prepared by an electrospinning chitosan solution, a PVA solution (poly(vinylalcohol)), and their mixture at different conditions. Analysis from a scanning electron microscope (SEM) showed that the formation and the density of nanofibers increase with increasing amount of PVA. The highest h was observed in solar cells which used anthocyanin extracted from red cabbage. When considering the photoactive layers made of TiO2:nanofibers prepared from the mixture between 1.2 % chitosan in acetic acid and 8 % PVA in aqueous solution at the ratio of 1:1. w/w ([1.2Chitosan]+[8PVA]), it raised the h up to 5.3 times higher than by the TiO2 alone. Therefore, the utilization of chitosan nanofibers together with the application of natural dyes has the potential to increase h of BPVs. doi:10.14456/WJST.2014.23 |
| Databáze: | Directory of Open Access Journals |
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