Cu-Cu_2O/C纳米复合物的制备及其光催化性能研究

Preparation of Cu-Cu_2O/C Namocomposites and its Photocatalytic Performance

本文以硫酸钠为熔融盐介质,油酸铜为前驱体,采用熔融盐焙烧法合成了Cu-Cu2O/C纳米复合材料.通过调整Cu Cl2·2H2O和KOH的比例以及焙烧温度,获得了不同物相和粒度的产物.XRD结果表明,所有产物均为Cu-Cu2O纳米复合物.TEM结果显示,产物为不同尺寸球形纳米粒子负载于碳膜上.对Cu-Cu2O-C复合材料的系列产物对甲基橙进行了光催化降解研究.结果表明,当焙烧温度为400℃,铜盐与碱摩尔比为1:2.5时,所得产物光催化性能为最佳,产物在光照180 min之后降解率达97.3%.

Cu-Cu2O/C nanocomposites were synthesized by molten-salt method with Na2SO4 as media and copper oleate as precursor.The phase and particles size of the products were tuned by adjusting the ratio of CuCl2·2H2O to KOH and calcination temperature. XRD results showed that the products were Cu-Cu2O. TEM results showed that the products were spheric particles loaded on the carbon film. The photocatalytic activities of the as-prepared nanocomposite were evaluated by the degradation of methyl orange （MO） dyes under UV irradiation. When copper salt： KOH was 1：2.5 and the calcination temperature was 400 ℃, the as-prepared sample showed the best performance. The degradation rate of MO was approached to 97.3% within 180 min.