Cu_2O纳米晶的合成及光催化性能研究

Synthesis of Cu_2O Nanocubes and Study of Photocatalytic Properifies

以Cu Cl2·H2O为主要原料,抗坏血酸作还原剂,聚乙二醇-20000(PEG-20000)作表面活性剂,利用化学混合法制备了Cu2O纳米立方体。研究了表面活性剂对Cu2O形貌的影响,采用SEM对产物物相和形貌进行了表征。以可见光为光源,研究制备的Cu2O纳米晶对亚甲基蓝的光催化降解率。结果表明,当Cu2O纳米晶与浓度为8mg/L的亚甲基蓝溶液的固液比为4g/L时,可见光照射4h后降解率达到75%。

A facile and mild synthetic approach involving CuC12＂ H20 as raw materials, sodium ascorbic as reductant and PEG-20000 as surfactant at room temperature is employed for generating crystalline cuprous oxide nanocubes. The effects of surfactant on surface morphology of crystalline cuprous oxide nanocubes were investigated. The structure and crystal phase of the power were determined by using of scanning electron micro- scope （SEM）. Methylene blue solution was used to examine the photocatalyst in visible light. The results showed that the degradation efficiency of methylene blue solution of 8 mg/L can reach 75% under the solar irradiation for 4 hours when the solid-liquid ration is 4g/L.