The Application And The Synthesis Of Nanometer Copper Oxide Via Coordination Oxidation Homogeneous Precipitation Method

Nanoparticles and nanocluster materials are a new class of advanced materials exhibiting unique chemical and physical properties compared to those of their bulk material. Nanosized copper oxide have attracted much attention because of their superior properties and applications in catalysis, metallurgy, electrode materials, solar energy transformation, semiconductors, gas sensors and high-Tc superconductors. Therefore, the relative research has very important theory significance and practicality value. Since there are many problems in existing methods, such as high cost, non-homogeneous of particle, and impurity, a new method with low cost, small particle and high purity is necessary to be studied and industrialized.A new method, namely, coordination oxidation homogenious precipitation method was described to synthesize high pure CuO and Ag/CuO nanoparticles. Field-emission scanning electron microscope (FESEM), transmission electron microscope (TEM), powder X–ray diffraction (XRD), thermal analysis (TG-DTA), infrared absorption spectroscopy (IR) were used to characterize the microstructure and morphologiy of the products. Furthermore, catalytic performances of the products were also investigated preliminarily.At first, very pure nanometer CuO with average particle diameters of 10-20nm was successfully prepared using metal copper, silver carbonate, ammonia, and ammonium bicarbonate as starting materials via coordination oxidation homogeneous precipitation method. Nanometer CuO was also obtained using cupric sulfate as copper source by coordination homogeneous precipitation method. The technological process conditions were explored and optimized in great depth, and the optimum conditions for preparing Cu2(OH)2CO3 precursors and CuO were obtained.Ag/CuO composite nanopowder was also successfully prepared using metal copper, silver carbonate, ammonia, and ammonium bicarbonate as starting materials via coordination oxidation homogeneous co-precipitation method. The method is new, facile, no need of washing process, and no need of expensive equipment. TEM images show as-prepared Ag/CuO nano-composites have uniform particle diameter (10nm) with minimal agglomeration.Finally, the catalysis of as-prepared products was also investigated in H2O2 decomposition and the phenol hydroxylation with H2O2. The results indicated that the products had a higher catalytic activity in the reactions.