从双金属配位聚合物到一维Ag@Co3O4纳米复合催化材料

doi:10.7503/cjcu20160199

高等学校化学学报 ›› 2016, Vol. 37 ›› Issue (10): 1876.doi: 10.7503/cjcu20160199

从双金属配位聚合物到一维Ag@Co₃O₄纳米复合催化材料

张佳佳, 崔放(), 邵青, 徐林煦, 崔铁钰

哈尔滨工业大学化工与化学学院, 哈尔滨 150080

收稿日期:2016-03-30 出版日期:2016-10-10 发布日期:2016-09-18
作者简介:联系人简介: 崔放, 女, 博士, 副教授, 主要从事无机有机复合功能材料的研究. E-mail:cuifang@hit.edu.cn
基金资助:
国家自然科学基金(批准号: 21104011, 51273051, 21174033)资助

1D Ag@Co₃O₄ Nanocomposite Catalysts Derived from Bimetallic Coordination Polymers^†

ZHANG Jiajia, CUI Fang^*(), SHAO Qing, XU Linxu, CUI Tieyu

School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150080, China

Received:2016-03-30 Online:2016-10-10 Published:2016-09-18
Contact: CUI Fang E-mail:cuifang@hit.edu.cn
Supported by:
† Supported by the National Natural Science Foundation of China(Nos.21104011, 51273051, 21174033)

摘要/Abstract

摘要：

以合成的双金属配位聚合物Co(MAA)₂/Ag(Ⅰ)纳米带为前驱体, 制备了一维Ag@Co₃O₄纳米复合催化材料. 采用傅里叶变换红外光谱(FTIR)、核磁共振氢谱(¹H NMR)、粉末X射线衍射分析(XRD)、扫描电子显微镜(SEM)及透射电子显微镜(TEM)等方法对其结构进行了表征, 结果表明, Ag纳米晶体和Co₃O₄纳米晶体均匀分布在Ag@Co₃O₄纳米带上. 采用紫外-可见吸收光谱(UV-Vis)等方法考察了Ag@Co₃O₄纳米复合材料在亚甲基蓝(MB)染料还原反应中的催化性能, 发现其具有良好的催化活性、循环稳定性及磁分离能力.

关键词: 双金属配位聚合物, 银, 四氧化三钴, 纳米复合材料, 催化性能

Abstract:

1D, magnetic Ag@Co₃O₄ nanocomposite catalysts were prepared using a synthesized precursor of bimetallic coordination polymers Co(MAA)₂/Ag(Ⅰ) nanoribbon. The structure of the obtained material was characterized by Fourier transform infrared spectroscopy(FTIR), proton nuclear magnetic resonance(¹H NMR), powder X-ray diffraction(XRD), scanning electron microscopy(SEM) and transmission electron microscope(TEM). The results suggested that both the Ag and Co₃O₄ nanocrystals distributed uniformly in the entire Ag@Co₃O₄ nanoribbon. Meanwhile, UV-Visible absorption spectrum(UV-Vis) was used to investigate the catalytic performance of Ag@Co₃O₄ nanocomposites towards the reduction of methyl blue(MB) dye by sodium borohydride(NaBH₄). The results show that the material has excellent catalytic activity, cyclic stability and magnetic separation ability.

Key words: Bimetallic coordination polymer, Ag, Co3O4, Nanocomposite material, Catalytic property

中图分类号:

O643
O631

TrendMD:

张佳佳, 崔放, 邵青, 徐林煦, 崔铁钰. 从双金属配位聚合物到一维Ag@Co₃O₄纳米复合催化材料. 高等学校化学学报, 2016, 37(10): 1876.

ZHANG Jiajia, CUI Fang, SHAO Qing, XU Linxu, CUI Tieyu. 1D Ag@Co₃O₄ Nanocomposite Catalysts Derived from Bimetallic Coordination Polymers^†. Chem. J. Chinese Universities, 2016, 37(10): 1876.

图/表 8

Fig.1 FTIR(A) and 1H NMR(B) spectra of Co(MAA)2 nanoribbons

Fig.2 Raman spectra of Co(MAA)2(a) and Co(MAA)2/Ag(Ⅰ)(b) nanoribbons

Fig.3 SEM(A,E), TEM(B—D, F—H) images and EDX elemental mappings(I) of Co(MAA)2 nanoribbons(A—D) and Co(MAA)2/Ag(I)(E—I) nanoribbonsInsets in (A) and (E): EDS spectra of Co(MAA)2 and Co(MAA)2/Ag(Ⅰ) nanoribbons, respectively.

Fig.4 Proposed structure model of Co(MAA)2 nanoribbons

Fig.5 SEM(A), TEM(B), HRTEM(C, D) images and EDX elemental mappings(E, F) of Ag@Co3O4 nanoribbons

Fig.6 Powder XRD pattern of Ag@Co3O4 nanoribbons

Fig.7 Time-dependent UV-Vis absorption spectra of the reaction solution in the presence of Ag@Co3O4 composites(A) and UV-Vis absorption spectra of the MB in different reaction systems(B) Inset of (A): the plots of the ln(ct/c0) vs. reaction time.

Fig.8 Significant decrease in the concentration of mixture of MB and NaBH4 solution as a function of the amounts of Ag@Co3O4 composites after reaction for 5 min(A), the digital camera photo of magnetic separation(B) and values of k1 for successive reactions employing Ag@Co3O4 composites(C)

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从双金属配位聚合物到一维Ag@Co₃O₄纳米复合催化材料

1D Ag@Co₃O₄ Nanocomposite Catalysts Derived from Bimetallic Coordination Polymers^†

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