Li Siliang, Li Hua, Liu Jian, Zhang Haoli, Yang Yanmei, Yang Zhengyin, Wang Linyun, Wang Baodui
Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry, and Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University Gansu, Lanzhou, 730000, P.R. China.
Dalton Trans. 2015 May 21;44(19):9193-9. doi: 10.1039/c5dt01036e.
The application of nanohybrids in water treatment by the catalytic degradation of various pollutants has attracted much attention from researchers. Here, the Pd/Fe3O4-PEI-RGO nanohybrids (1d) with high shape selectivity and high specific surface area have been synthesized by the dispersion of Pd NPs and Fe3O4 NPs on PEI modified graphene oxide sheets. These nanohybrids show superior catalytic activity toward methylene blue with a high degradation efficiency above 99% in the presence of NaBH4 in aqueous solution, which is attributed to the effects of the Pd NPs supported on reduced graphene oxide nanosheets. Meanwhile, the 1d catalyst can be easily separated from the reaction mixture by applying an external magnetic field. The catalyst was recycled nine times without showing any significant loss in its activity. Such features enable this catalyst for promising application in catalysis, environment, and new energy fields.
纳米杂化物通过催化降解各种污染物在水处理中的应用已引起研究人员的广泛关注。在此，通过将钯纳米颗粒（Pd NPs）和四氧化三铁纳米颗粒（Fe3O4 NPs）分散在聚乙烯亚胺（PEI）修饰的氧化石墨烯片上，合成了具有高形状选择性和高比表面积的Pd/Fe3O4-PEI-RGO纳米杂化物（1d）。在水溶液中存在硼氢化钠（NaBH4）的情况下，这些纳米杂化物对亚甲基蓝表现出优异的催化活性，降解效率高达99%以上，这归因于负载在还原氧化石墨烯纳米片上的Pd NPs的作用。同时，通过施加外部磁场，可以轻松地将一维催化剂与反应混合物分离。该催化剂可循环使用九次，其活性没有任何显著损失。这些特性使得这种催化剂在催化、环境和新能源领域具有广阔的应用前景。
