Decolorization of Rhodamine B Dye by CuO Nanoparticles Synthesized by Quick Precipitation Method

• Main Authors: WU,HSIN-YI, 吳欣怡
• Other Authors: CHEN,WEN-CHANG
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/nu38rz

碩士 === 國立雲林科技大學 === 化學工程與材料工程系 === 105 === Conventional methods for the preparation of CuO powders include one-step solid state reaction at room temperature, thermal decomposition of copper salts, mechanical milling of commercial powders, and so on. However, the dispersion of the nanometer CuO prepared by these methods is not good and forms an obstacle in many applications. Recently, some new synthetic methods have been developed for the purpose of obtaining good dispersion of nano-CuO. However, the equipment of these methods is expensive and the reaction conditions are harsh and require a large amount of organic solvent. In this study, highly dispersed nano-CuO in aqueous solution was prepared by simple quick-precipitation method and applied for catalytic degradation of Rhodamine B (Rh B). Using XRD and FTIR the as-prepared CuO was confirmed to have no other impurities, and TEM analyses revealed that it had a uniformly spherical shape with an average diameter of around 6.4 nm. From UV-vis absorption spectrum, the nano-CuO suspension was stable for up to 1 month and the band gap is estimated to be 3.01 eV. The feasibility of CuO/H2O2 system for catalytic degradation of Rh B was also investigated. Results demonstrated that at room temperature, 100 mL 10 ppm Rh B solution (pH 7) could be effectively degraded over 3 hrs by adding 1 mg CuO and 1 mL of 30% H2O2. Furthermore, the nano-CuO also showed a higher catalytic activity in Rh B degradation than other forms of CuO. This indicates that it may have a considerable potential on the applications in environmental chemistry and biotechnology.