以硝酸铜和改进的Hummers法制备的氧化石墨烯为原料，原位生长制备CuO/石墨烯。采用SEM、XRD手段对其进行表征，并在紫外光照射和外加电场条件下考察了对亚甲基蓝的催化降解效果。实验结果表明，石墨烯的加入，增强了催化剂的吸附性和导电性，外加电场的施加，使得电极- 催化剂颗粒- 电极之间形成三电极体系，大幅提升了CuO的催化效率。与纯的CuO相比，CuO/石墨烯对亚甲基蓝的光催化降解率从33.23%提高到91.77%，对亚甲基蓝的光电催化降解率达93.16%。
Abstract
CuO/graphene is in- situ prepared by the co- precipitation method using Cu(NO3)2·3H2O and graphene oxide as raw materials. The catalyst is characterized by XRD and SEM. The catalytic performance is investigated by degradating methylene blue solution under the ultraviolet light and applied electric field. The results show that graphene has enhanced the adsorption and electrical conductivity of the catalyst and the applied electric field makes a three electrode system between catalyst particles and the two electrode plates. The catalytic properties of CuO have been highly improved because of the introduction of graphene and applied electric field. Compared with pure CuO, the photocatalytic degradation of methylene blue by CuO/graphene increases from 33.23% to 91.77%, and the photo- electro catalytic degradation of methylene blue reaches 93.16%.
关键词
石墨烯 /
氧化铜 /
原位生长 /
光电催化
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Key words
graphene /
copper oxide /
in-situ growth /
photo-electro catalysis
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