Abstract
A hierarchical urchin-like ZnO nanostructure was successfully synthesized via a facile and efficient hydrothermal method. The sample was characterized by XRD, FESEM, TEM, BET, UV–Vis DRS and Photoluminescence (PL) techniques. The urchin-like ZnO is assembled by many nanorods and has the average size of 1.5 μm. The BET surface and pore volume of urchin-like ZnO were measured to be 53.9 m2 g−1 and 0.073 cm3 g−1. The hydrothermal time and pH value have important effect on the morphology. UV–Vis spectra show that a narrower band gap for the urchin-like ZnO as compared to commercial ZnO. PL spectra indicate that the urchin like ZnO has the higher donors and fewer acceptors than that of commercial ZnO. Furthermore, the urchin-like ZnO nanostructure exhibited excellent gas sensing properties towards acetone, indicating that the as-prepared urchin-like ZnO is a promising material for gas sensors.
Published Version
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