Solventless Delignification of Wood Flour with TiO2/poly(ethylene oxide) Photocatalyst System |
| |
Authors: | Yuuki Miyata Kensuke Miyazaki Masahiro Miura Yasutaka Shimotori Masakazu Aoyama Hisayuki Nakatani |
| |
Institution: | 1. Department of Biotechnology and Environmental Chemistry, Kitami Institute of Technology, 165 Koen-cho, Kitami, Hokkaido, 090-8507, Japan
|
| |
Abstract: | A novel solventless delignification of a defatted Picea glehnii wood flour sample was performed using a TiO2/polyethylene oxide (PEO) photocatalyst system. A cell wall structure of the wood flour was directly observed, showing that its lignin fraction was removed by the photodegradation. The total lignin amount was slightly decreased as compared with that of the pristine sample, and the vanillin formation was confirmed by the 1H-NMR measurement. The TiO2 worked as a radical initiator, and simultaneously acid and aldehyde compounds produced by the PEO photolysis did as an accelerator for the solventless delignification. Although the photocatalyst system showed high delignification activity even for a low molecular lignin model, the delignification of the wood flour sample was confined to the surface. It was found that the suppressed delignification behavior was due to crosslinked structure of lignin. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|