Preparation and Optical Properties of ZnO-Cellulose Nanocomposites.
writer：Bin Shen, Na Chen, Mingliang Wang*, Chunxiang Xu* and Yan Wang
keywords：ZnO, Cellulose, Nanocomposites
source：期刊
specific source：Nanosci. Nanotechnol. Lett. 5(2), 309-315, 2013.
Issue time：2013年
ZnO-cellulose nanocomposites are prepared by mixing nanocrystalline cellulose (NCC) colloids with ZnAc2·2H2O alkaline solution by ultrasound assisted approach. The sample is characterized by X-ray diffraction, Scanning electron microscope (SEM), Transmission electron microscopy (TEM), Thermogravimetric analyzer (TGA), UV-Vis spectroscopy and spectrofluorometer. The results show that ZnO nanoparticles are attached on the surface of NCC in the composites. In addition, the relationship between the ratio of NCC to Zn2+ and fluorescent intensity is investigated. It is found that the composites emit green light peaking at 570 nm and the emission is most intensive when 3.7% ZnO is attached to NCC with free hydroxyl group still existed on the surface. A plausible explanation of composite formation and optical properties is proposed.