Preparation Of Different Morphologies Of CuO By Controlling Micro-droplets And Their Properties Of Photocatalysis And Gas-sensing

As a P-type semiconductor with a narrow band gap (1.2 eV), cupric oxide (CuO) has beenwidely exploited for a number of interesting properties, such as fabrication of electrical,optical, and photovoltaic devices; gas sensing; heterogeneous catalysis and so on. Thesevarious CuO structures have been synthesized by a number of different methods, such ashydrothermal synthesis, thermal evaporation and chemical vapor deposition. However, thesemethods required either sophisticated instruments or involved complicated procedures. Thus,a simple and fast route for the synthesis of CuO materials under ambient conditions is stillrequired to meet economic and industrial needs.In this paper, we report a simple method for controlling the morphology of CuOnanostructures by droplet on the hydrophobic substrate. This method doesn’t requiredsophisticated instruments or involved complicated procedures. We use X-ray diffraction andfield emission scanning electron microscope to characterize and observe the structure andmorphology. The results indexed to the monoclinic phase CuO with platelets and flower-likemorphology.In order to understand the formation mechanism of such different morphology of CuO, theanneal process was observed by optical microscope. According the results of experiment, weindicate a simple method for controlling the morphology of CuO nanostructures by droplet.The morphology of CuO shapes could be controlled by volume of droplet et al.The thesis focused on treating the Methylene blue trihydrate and Methyl orange withdifferent morphology of CuO photocatalyst under UV. We also use the CuO as asemiconductor gas sensor and the results show that the flowerlike CuO have the bestsensitivity to ethanol and methyl alcohol.