胺基改性磁性纳米石墨片复合材料的制备与表征

doi:10.7503/cjcu20160497

高等学校化学学报 ›› 2016, Vol. 37 ›› Issue (11): 1947.doi: 10.7503/cjcu20160497

• 研究论文: 无机化学 • 上一篇下一篇

胺基改性磁性纳米石墨片复合材料的制备与表征

邢丹, 马应霞(), 阮永欣, 杜雪岩()

兰州理工大学有色金属先进加工与再利用省部共建国家重点实验室, 材料科学与工程学院, 兰州 730050

收稿日期:2016-07-13 出版日期:2016-11-10 发布日期:2016-10-19
作者简介:联系人简介: 马应霞, 女, 博士, 副教授, 主要从事磁性有机/无机纳米杂化材料研究. E-mail: mayx2011818@163.com; 杜雪岩, 男, 博士, 教授, 博士生导师, 主要从事磁性纳米复合材料研究. E-mail: duxy@lut.cn
基金资助:
国家自然科学基金(批准号: 51403091)和中国博士后科学基金(批准号: 2015M572616)资助

Preparation and Characterization of Amino-functionalized Magnetic Graphite Nanosheet Nanocomposites^†

XING Dan, MA Yingxia^*(), RUAN Yongxin, DU Xueyan^*()

State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, School of Materials & Science,Lanzhou University of Technology, Lanzhou 730050, China

Received:2016-07-13 Online:2016-11-10 Published:2016-10-19
Contact: MA Yingxia,DU Xueyan E-mail:mayx2011818@163.com;duxy@lut.cn
Supported by:
† Supported by the National Natural Science Foundation of China(No.51403091) and the Postdoctoral Science Foundation of China(No.2015M572616)

摘要/Abstract

摘要：

以纳米石墨片(GNS)为载体, FeCl₃·6H₂O为前驱体, 乙二胺为改性剂和还原剂, 乙二醇为表面活性剂和还原剂, 无水乙酸钠为稳定剂, 通过溶剂热法一步制备了胺基改性磁性GNS(NH₂-GNS/Fe₃O₄)纳米复合材料. 利用透射电子显微镜(TEM)、 X射线衍射仪(XRD)、傅里叶变换红外光谱仪(FTIR)和振动样品磁强计(VSM)对样品进行了表征, 并研究了其对水溶液中Ag(Ⅰ)的吸附性能. 结果表明, NH₂-GNS/Fe₃O₄纳米复合材料的磁性能可以满足固液相分离的要求. NH₂-GNS/Fe₃O₄纳米复合材料对Ag(Ⅰ)具有吸附性能, 且在对Ag(Ⅰ)的吸附过程中将Ag(Ⅰ)还原为单质银, 该吸附过程为发生在均质表面的单层吸附.

关键词: 纳米石墨片, 溶剂热法, 纳米复合材料, Ag(Ⅰ), 吸附

Abstract:

Amino-functionalized magnetic graphite nanosheet(NH₂-GNS/Fe₃O₄) nanocomposites were prepared by one-pot solvothermal method with GNS as carrier, FeCl₃·6H₂O as precursor, ethylenediamine as modifier and reductant, ethanediol as surfactant and reductant and sodium acetate as stabilizer. The as-prepared sample was characterized by transmission electron microscope(TEM), X-ray diffractometer(XRD), Fourier transform infrared spectrometer(FTIR) and vibrating sample magnetometer(VSM). The adsorption property of the NH₂-GNS/Fe₃O₄ nanocomposites for Ag(Ⅰ) in aqueous solution was studied. The results indicate that the NH₂-GNS/Fe₃O₄ nanocomposites were successfully prepared, the magnetic property of NH₂-GNS/Fe₃O₄ nanocomposites could meet the requirement of the solid-liquid separation. The NH₂-GNS/Fe₃O₄ nanocomposites had adsorption property for Ag(Ⅰ) in aqueous solution, moreover, Ag(Ⅰ) was reduced into silver in the process of adsorption. The adsorption process of NH₂-GNS/Fe₃O₄ nanocomposites for Ag(Ⅰ) in aqueous solution was the monolayer adsorption on the homogeneous surface.

Key words: Graphite nanosheet, Solvothermal method, Nanocomposite, Ag(Ⅰ), Adsorption

中图分类号:

TrendMD:

邢丹, 马应霞, 阮永欣, 杜雪岩. 胺基改性磁性纳米石墨片复合材料的制备与表征. 高等学校化学学报, 2016, 37(11): 1947.

XING Dan, MA Yingxia, RUAN Yongxin, DU Xueyan. Preparation and Characterization of Amino-functionalized Magnetic Graphite Nanosheet Nanocomposites^†. Chem. J. Chinese Universities, 2016, 37(11): 1947.

图/表 7

Fig.1 TEM image of NH2-GNS/Fe3O4 nanocomposites(A) and the corresponding SAED pattern(B)

Fig.2 XRD patterns of GNS(a), NH2-GNS/Fe3O4 nanocomposites before(b) and after(c) adsorption of Ag(Ⅰ)

Fig.3 FTIR spectra of GNS(a) and NH2-GNS/Fe3O4 nanocomposites(b)

Fig.4 Magnetization curve for NH2-GNS/Fe3O4 nanocomposites(A) and digital photos of NH2-GNS/Fe3O4 nanocomposites before(left) and after(right) magnetic separation in aqueous solution at room temperature(B)

Fig.5 Effect of initial concentration on adsorption of Ag(Ⅰ)

Fig.6 Langmuir isotherm(A) and Freundlich isotherm(B)

Table 1 Langmuir and Freundlich isotherm parameters for adsorption of Ag(Ⅰ) on NH2-GNS/Fe3O4 nanocomposites*

Langmuir			Freundlich
q_m/(mg·g^-1)	K_L/(L·mg^-1)	R²	K_F/(mg·g^-1)	n/(mg·L^-1)	R²
12.6103	0.8564	0.9997	5.9769	4.2571	0.7958

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胺基改性磁性纳米石墨片复合材料的制备与表征

Preparation and Characterization of Amino-functionalized Magnetic Graphite Nanosheet Nanocomposites^†

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胺基改性磁性纳米石墨片复合材料的制备与表征

Preparation and Characterization of Amino-functionalized Magnetic Graphite Nanosheet Nanocomposites†

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Preparation and Characterization of Amino-functionalized Magnetic Graphite Nanosheet Nanocomposites^†