2.1 Materials
All chemicals used were analytical grade without further purification.
Glucosamine hydrochloride, melamine,
Ni(OAc)2•4H2O,
active carbon (AC), Raney nickel and Ru/C were purchased from Aladdin
Chemistry Co. Ltd (China). 2-phenoxy-1-phenethanol, phenethoxybenzene,
phenol, ethylbenzene, phenylethyl alcohol were purchased from Alfa Aesar
Co. Inc. (China). Birch wood was purchased from Shandong wood Co. Ltd.
(China).