Generation of photo charge in poly(ethyleneimine)-TiO2-anthocyanin modified papers conditioned at different humidities.
Author | Skipina, B. |
Author | Luyt, A.S. |
Author | Csoka, L. |
Author | Djokovic, V. |
Author | Dudic, D. |
Available date | 2018-07-04T09:06:16Z |
Publication Date | 2018 |
Publication Name | Dyes and Pigments |
Identifier | http://dx.doi.org/10.1016/j.dyepig.2017.08.064 |
Citation | Škipina, B., Luyt, A. S., Csóka, L., Djoković, V., & Dudić, D. (2018). Generation of photo charge in poly (ethyleneimine)-TiO2-anthocyanin modified papers conditioned at different humidities. Dyes and Pigments, 149, 51-58. |
ISSN | 0143-7208 |
Abstract | The article describes the influence of humidity on the surface photodielectric properties of papers prepared from poly(ethyleneimine)-TiO2 nanoparticles-anthocyanin modified cellulose fibres. The anthocyanins were extracted from purple cabbage, beet-root, plum peel, red wine and red currant juice. The samples were conditioned to various relative humidities (from 9 to 100%) and illuminated with white visible light, λ ≥ 405 nm. The poly(ethyleneimine)-TiO2-anthocyanin modified samples showed similar photodielectric behaviour that can be clearly distinguished from the samples modified solely with poly(ethyleneimine)-TiO2. Generally, an increase in humidity enhances the conductivity of the samples and induces an increase in the amount of photo-induced charge. Also, at higher humidities (above 80%), the samples with anthocyanin showed significantly higher values of photo-induced charges with respect to anthocyanin free samples. The presented results suggest that the presence of water molecules promotes electron-injection processes from the anthocyanin to the semiconductor surface. |
Sponsor | This work was supported in part by the Ministry of Education and Science, Republic of Serbia (Project Nos. 171029, 172056, and 45020), by the Environment conscious energy efficient building TAMOP-4.2.2.A–11/1/KONV-2012-0068 project sponsored by the EU and European Social Foundation and by the National Research Foundation, South Africa (Grant No. 88301). |
Language | en |
Publisher | Elsevier |
Subject | Anthocyanin TiO2 Cellulose Photodielectric Humidity |
Type | Article |
Pagination | 51-58 |
Volume Number | 149 |
ESSN | 1873-3743 |
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