光催化
化学工程
甲基橙
纳米颗粒
材料科学
煅烧
磁性纳米粒子
水溶液
透射电子显微镜
锌
降水
核化学
纳米技术
化学
催化作用
有机化学
冶金
物理
工程类
气象学
作者
Ruoyu Hong,S.Z. Zhang,G.Q. Di,H.Z. Li,Ying Zheng,Jing Ding,Dongguang Wei
标识
DOI:10.1016/j.materresbull.2007.07.035
摘要
Fe3O4 magnetic nanoparticles (MNPs) were synthesized by a co-precipitation method. The phase purity was confirmed by X-ray powder diffraction (XRD) analysis. The crystal size was found to be 10 nm from transmission electron microscopy (TEM). It is evidenced that the surface of Fe3O4 MNPs was modified by sodium citrate. The Fe3O4/ZnO core/shell MNPs were obtained by coating the MNPs with direct precipitation using zinc acetate and ammonium carbonate. The precursor was firstly dried and then calcined at 350 °C. The antioxidation tests indicated that the core/shell MNPs give better antioxidation than that of the Fe3O4 MNPs. The photocatalytic degradation of methyl orange revealed that the core/shell MNPs have higher photocatalytic activity than that of the ZnO nanoparticles. Separation of the core/shell MNPs from the aqueous suspension using a magnet provides an easy way to recycle the core/shell MNPs. After four-time recycling, the photocatalytic degradation percentage of the core/shell MNPs is about 70%.
科研通智能强力驱动
Strongly Powered by AbleSci AI