F_(e)3O_(4)/PEI/GO复合材料的制备及其吸附效果研究  

STUDY ON PREPARATION AND ADSORPTION PROPERTIES OF F_(e)3O_(4)/PEI/GO

作　　者：郭丰艳 金昌磊[1] 吕燕[1,2] 邵俊 GUO Fengyan;JIN Changlei;LV Yan;SHAO Jun(Department of Environmental and Chemical Engineering,Tangshan University Tangshan 063000,China;Key Laboratory of Chemical Environmental Protection and New Film Coating Materials in Tangshan City,Tangshan 063000,China)

机构地区：[1]唐山学院环境与化学工程系,唐山063000 [2]唐山市化工环保与新型薄膜涂层材料重点实验室,唐山063000

出　　处：《离子交换与吸附》2021年第2期164-174,共11页Ion Exchange and Adsorption

基　　金：2020年河北省高等学校科学技术研究指导项目(Z2020130);唐山市科技局项目(17130253a)。

摘　　要：以氧化石墨烯(GO)和聚乙烯亚胺(PEI)为反应物,采用共混法制备PEI/GO,然后将F_(e)3O_(4)纳米颗粒分散沉积到PEI/GO表面,得到了复合材料F_(e)3O_(4)/PEI/GO。利用傅里叶红外光谱(FT-IR)、透射电子显微镜(TEM)、X射线衍射(XRD)和X射线光电子能谱(XPS)等方法对该材料进行表征,并研究了其对Cu^(2+)的吸附性能。结果表明,PEI与GO的羧基反应生成了酰胺键,F_(e)3O_(4)成功沉积在GO表面,GO层状结构的规整性被破坏。Freundlich等温吸附模型和准二级动力学模型能更好地拟合Cu^(2+)在F_(e)3O_(4)/PEI/GO表面的吸附过程,说明该吸附主要受化学作用控制,可能是F_(e)3O_(4)/PEI/GO表面的胺基、羧基、羟基等活性基团与Cu^(2+)发生了离子交换或络合反应所致。With graphene oxide(GO) and polyethyleneimine(PEI) as reactants, a substance(named as PEI/GO) was prepared by the method of solution blending. F_(e)3O_(4) nanoparticles were dispersed and deposited on the surface of PEI/GO, and a composite(named as F_(e)3O_(4)/PEI/GO) was obtained. The sample was characterized by Fourier Transform Infrared Spectroscopy(FT-IR), Transmission Electron Microscopy(TEM), X-ray Diffraction(XRD) and X-ray Photoelectron Spectroscopy(XPS). The adsorption of Cu^(2+) on F_(e)3O_(4)/PEI/GO was further researched. The results showed that the amide bond was formed by reaction of PEI and carboxyl of GO. The regularity of GO layered structure was destroyed, and F_(e)3O_(4) was successfully deposited on the surface of GO. The adsorption behavior of F_(e)3O_(4)/PEI/GO can be described by Freundlich isothermal adsorption model. And the adsorption kinetic can be well simulated by Quasi-second-order kinetic model. These results indicated that the adsorption of Cu^(2+) on F_(e)3O_(4)/PEI/GO was dominated by chemical adsorption. Ion exchange or complexation reaction could occur between Cu^(2+) and the active group such as amino, carboxyl or hydroxyl of F_(e)3O_(4)/PEI/GO.

关 键 词：聚乙烯亚胺 氧化石墨烯 F_(e)3O_(4) 吸附 

分 类 号：O69[理学—化学] X703[环境科学与工程—环境工程]