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Facile Synthesis of Metal Oxide Nanomaterials by Plasma in Water
Keywords: metal oxide nanomaterials, synthesis, plasma
Metal oxide semiconductor nanomaterials exhibit size-dependent photonic and electric properties that are of interest for applications such as biosensors, optics, and electronics. Until now various synthesis methods (such as chemical decomposition, sol-gel, electrochemical deposition and vacuum metal-vapor-condensation techniques) were carried out. Recently, solution plasma processing defined by non-equilibrium plasma in solutions, provides us a novel reaction field with highly excited energy state. Metal nanoparticles including gold (Au), platinum (Pt), and platinum-gold (PtAu) alloyed nanoparticles were successfully synthesized without any additions such as reductant in an open system [1-3]. In the present study, we supplied a novel route for efficient synthesis of copper oxide (CuO), zinc oxide (ZnO), and tin oxide (SnO2) nanoparticles from their metal wire electrodes or metal salts by plasma in an aqueous solution. We detailed discussed the synthesis and characteristic of metal oxide nanomaterials by controlling electrode materials, discharge conditions. A desired amount of products can be controllable fabricated by simply prolong discharge time, or a circulation flow or using multiple discharges. The advantage of this method is facile operation at room temperature without any vacuum and inert gas in an open system. More details on the synthesis of functional semiconductor nanomaterials and formation mechanisms will be discussed at the conference.
Xiulan Hu, Professor
College of Materials Science and Engineering, Nanjing Tech University, Nanjing, China
Nanjing, Jiangsu

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