Synthesis of Microstructured ZnO in Hydrazine Hydrate Using a Hydrothermal Method and its Optical Properties
Microstructured ZnO have been synthesized by a simple hydrothermal approach, using ZnCl2 as the zinc source and N2H4·H2O as the amine precursor in water-ethylene glycol solution at 120 °C for 8 h. The X-ray diffractrometer pattern indicates the pure phase formation of ZnO. Scanning electron microscope images show that the aspect ratio of the ZnO microrod increases by the amount of N2H4·H2O ranging from 0.5 to 1mL, but continuing to 3ml, the aspect ratio of the ZnO microrods decreases. Moreover, the optical band gaps calculated through UV spectroscopy are found to increase from 2.94 (±0.02) to 3.0 (±0.02) eV for samples synthesized at different amounts of hydrazine hydrate ranging from 0.5 to 1mL, respectively.
Z.S. Liu, L.P. Xu, X.D. Liang, Z.H. Wang and H.M. Zhang
X. Y. Fei et al., "Synthesis of Microstructured ZnO in Hydrazine Hydrate Using a Hydrothermal Method and its Optical Properties", Advanced Materials Research, Vol. 1015, pp. 684-687, 2014