磁性杂氮介孔空心碳纳米球的制备及吸附Cu2+性能测试

Preparation of Magnetic Nitrogen-doped Mesoporous Hollow Carbon Nanospheres and its Adsorption Properties for Cu2+

stober条件下,以自制的四氧化三铁为磁性内核,采用原位掺氮法,以富含氨基官能团的多巴胺为碳源,正硅酸乙酯为硅源,一步合成了Fe3O4@SiO2@PDA复合物微粒。通过碳化和选择性刻蚀除去SiO2层,得到磁性杂氮介孔空心碳纳米球Fe3O4@C。SEM、TEM表征证实,该产品具有完整的球形和明显的空腔,呈Rattle型微观形貌。氮气吸附测试证明该纳米粒子具有介孔,孔径为3nm。以硝酸铜溶液为吸附模型,实验测得该Fe3O4@C吸附剂的吸附量达到53mg·g^-1。

Under stober conditions, applied self-made ferric oxide as magnetic core, dopamine as carbon source and tetraethyl orthosilicate as silicon source, Fe3O4@SiO2@PDA composite particles were synthesized by in situ nitrogen doping method. The magneticnitrogendoped mesoporous hollow carbon nanospheres Fe3O4@C were prepared by carbonization and subsequent selective etching for removal of SiO2 layer. SEM and TEM characterization confirmed that the product had complete spherical and obvious cavity, and showed Rattle micro-morphology. Nitrogen adsorption tests showed that the nanoparticles had mesoporous structure with a pore size of 3 nm. Applied copper nitrate solution as adsorption model, the adsorption capacity of the Fe3O4@C adsorbent reached 53 mg/g.