Encapsulation of superparamagnetic Fe3O4@SiO2 core/shell nanoparticles in MnO2 microflowers with high surface areas

Citation: Yu-Gang Sun, Tu T. Truong, Yu-Zi Liu, Yong-Xing Hu. Encapsulation of superparamagnetic Fe₃O₄@SiO₂ core/shell nanoparticles in MnO₂ microflowers with high surface areas[J]. Chinese Chemical Letters, 2015, 26(2): 233-237. doi: 10.1016/j.cclet.2014.10.012 shu

Encapsulation of superparamagnetic Fe₃O₄@SiO₂ core/shell nanoparticles in MnO₂ microflowers with high surface areas

通讯作者: Yu-Gang Sun,

摘要: Microflowers made of interconnected MnO₂ nanosheets have been successfully synthesized in a microwave reactor through a hydrothermal reduction of KMnO₄ with aqueous HCl at elevated temperatures in the presence of superparamagnetic Fe₃O₄@SiO₂ core-shell nanoparticles. Due to the chemical compatibility between SiO₂ and MnO₂, the heterogeneous reaction leads to the spontaneous encapsulation of the Fe₃O₄@SiO₂ core-shell nanoparticles in the MnO₂ microflowers. The resulting hybrid particles exhibit multiple properties including high surface area associated with the MnO₂ nanosheets and superparamagnetism originated from the Fe₃O₄@SiO₂ core-shell nanoparticles, which are beneficial for applications requiring both high surface area and magnetic separation.

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English

Encapsulation of superparamagnetic Fe₃O₄@SiO₂ core/shell nanoparticles in MnO₂ microflowers with high surface areas

1.
Center for Nanoscale Materials, Argonne National Laboratory, Argonne, IL 60439, USA

Corresponding author: Yu-Gang Sun,

Received Date: 01 September 2014
Available Online: 18 October 2014

Abstract: Microflowers made of interconnected MnO₂ nanosheets have been successfully synthesized in a microwave reactor through a hydrothermal reduction of KMnO₄ with aqueous HCl at elevated temperatures in the presence of superparamagnetic Fe₃O₄@SiO₂ core-shell nanoparticles. Due to the chemical compatibility between SiO₂ and MnO₂, the heterogeneous reaction leads to the spontaneous encapsulation of the Fe₃O₄@SiO₂ core-shell nanoparticles in the MnO₂ microflowers. The resulting hybrid particles exhibit multiple properties including high surface area associated with the MnO₂ nanosheets and superparamagnetism originated from the Fe₃O₄@SiO₂ core-shell nanoparticles, which are beneficial for applications requiring both high surface area and magnetic separation.

Key words:

1. [1] J. Fei, Y. Cui, X. Yan, et al., Controlled preparation of MnO₂ hierarchical hollow nanostructures and their application in water treatment, Adv. Mater. 20 (2008) 452-456.[1] J. Fei, Y. Cui, X. Yan, et al., Controlled preparation of MnO₂ hierarchical hollow nanostructures and their application in water treatment, Adv. Mater. 20 (2008) 452-456.
2. [2] H. Chen, J. He, Facile synthesis and monodisperse manganese oxide nanostructures and their application in water treatment, J. Phys. Chem. C 112 (2008) 17540-17545.[2] H. Chen, J. He, Facile synthesis and monodisperse manganese oxide nanostructures and their application in water treatment, J. Phys. Chem. C 112 (2008) 17540-17545.
3. [3] Y. Zhai, J. Zhai, M. Zhou, S. Dong, Ordered magnetic core-manganese oxide shell nanostructures and their application in water treatment, J. Mater. Chem. 19 (2009) 7030-7035.[3] Y. Zhai, J. Zhai, M. Zhou, S. Dong, Ordered magnetic core-manganese oxide shell nanostructures and their application in water treatment, J. Mater. Chem. 19 (2009) 7030-7035.
4. [4] A.A. Pandit, R.A. Pawar, D.R. Shinde, Colloidal MnO₂ catalysed degradation of two azo dyes methyl red and methyl orange from aqueous medium, Int. J. Sci. Eng. Res. 4 (2013) 1119-1122.[4] A.A. Pandit, R.A. Pawar, D.R. Shinde, Colloidal MnO₂ catalysed degradation of two azo dyes methyl red and methyl orange from aqueous medium, Int. J. Sci. Eng. Res. 4 (2013) 1119-1122.
5. [5] H. Huang, S. Sithambaram, C.H. Chen, et al., Microwave-assisted hydrothermal synthesis of cryptomelane-type octahedral molecular sieves (OMS-2) and their catalytic studies, Chem. Mater. 22 (2010) 3664-3669.[5] H. Huang, S. Sithambaram, C.H. Chen, et al., Microwave-assisted hydrothermal synthesis of cryptomelane-type octahedral molecular sieves (OMS-2) and their catalytic studies, Chem. Mater. 22 (2010) 3664-3669.
6. [6] Z. Ai, L. Zhang, F. Kong, et al., Microwave-assisted green synthesis of MnO₂ nanoplates with environmental catalytic activity, Mater. Chem. Phys. 111 (2008) 162-167.[6] Z. Ai, L. Zhang, F. Kong, et al., Microwave-assisted green synthesis of MnO₂ nanoplates with environmental catalytic activity, Mater. Chem. Phys. 111 (2008) 162-167.
7. [7] X. Lang, A. Hirata, T. Fujita, M. Chen, Nanoporous metal/oxide hybrid electrodes for electrochemical supercapacitors, Nat. Nanotechnol. 6 (2011) 232-236.[7] X. Lang, A. Hirata, T. Fujita, M. Chen, Nanoporous metal/oxide hybrid electrodes for electrochemical supercapacitors, Nat. Nanotechnol. 6 (2011) 232-236.
8. [8] M.M. Thackeray, Manganese oxides for lithium batteries, Prog. Solid State Chem. 25 (1997) 1-71.[8] M.M. Thackeray, Manganese oxides for lithium batteries, Prog. Solid State Chem. 25 (1997) 1-71.
9. [9] W. Wei, X. Cui, W. Chen, D.G. Ivey, Manganese oxide-based materials as electrochemical supercapacitor electrodes, Chem. Soc. Rev. 40 (2011) 1697-1721.[9] W. Wei, X. Cui, W. Chen, D.G. Ivey, Manganese oxide-based materials as electrochemical supercapacitor electrodes, Chem. Soc. Rev. 40 (2011) 1697-1721.
10. [10] S. Devaraj, N. Munichandraiah, Effect of crystallographic structure of MnO₂ on its electrochemical capacitance properties, J. Phys. Chem. C 112 (2008) 4406-4417.[10] S. Devaraj, N. Munichandraiah, Effect of crystallographic structure of MnO₂ on its electrochemical capacitance properties, J. Phys. Chem. C 112 (2008) 4406-4417.
11. [11] T. Brousse, M. Toupin, R. Dugas, et al., Crystalline MnO₂ as possible alternatives to amorphous compounds in electrochemical supercapacitors, J. Electrochem. Soc. 153 (2006) A2171-A2180.[11] T. Brousse, M. Toupin, R. Dugas, et al., Crystalline MnO₂ as possible alternatives to amorphous compounds in electrochemical supercapacitors, J. Electrochem. Soc. 153 (2006) A2171-A2180.
12. [12] X.L. Wang, A.B. Yuan, Y.Q. Wang, Supercapacitive behaviors and their temperature dependence of sol-gel synthesized nanostructured manganese dioxide in lithium hydroxide electrolyte, J. Power Sources 172 (2007) 1007-1011.[12] X.L. Wang, A.B. Yuan, Y.Q. Wang, Supercapacitive behaviors and their temperature dependence of sol-gel synthesized nanostructured manganese dioxide in lithium hydroxide electrolyte, J. Power Sources 172 (2007) 1007-1011.
13. [13] G.H. Qiu, H. Huang, S. Dharmarathna, et al., Hydrothermal synthesis of manganese oxide nanomaterials and their catalytic and electrochemical properties, Chem. Mater. 23 (2011) 3892-3901.[13] G.H. Qiu, H. Huang, S. Dharmarathna, et al., Hydrothermal synthesis of manganese oxide nanomaterials and their catalytic and electrochemical properties, Chem. Mater. 23 (2011) 3892-3901.
14. [14] T.T. Truong, Y. Liu, Y. Ren, L. Trahey, Y. Sun, Morphological and crystalline evolution of nanostructured MnO₂ and its application in lithium-air batteries, ACS Nano 6 (2012) 8067-8077.[14] T.T. Truong, Y. Liu, Y. Ren, L. Trahey, Y. Sun, Morphological and crystalline evolution of nanostructured MnO₂ and its application in lithium-air batteries, ACS Nano 6 (2012) 8067-8077.
15. [15] D. Dallinger, C.O. Kappe, Microwave-assisted synthesis in water as solvent, Chem. Rev. 107 (2007) 2563-2591.[15] D. Dallinger, C.O. Kappe, Microwave-assisted synthesis in water as solvent, Chem. Rev. 107 (2007) 2563-2591.
16. [16] Y.J. Zhu, F. Chen, Microwave-assisted preparation of inorganic nanostructures in liquid phase, Chem. Rev. 114 (2014) 6462-6555.[16] Y.J. Zhu, F. Chen, Microwave-assisted preparation of inorganic nanostructures in liquid phase, Chem. Rev. 114 (2014) 6462-6555.
17. [17] J. Ge, Y. Hu, M. Biasini, W.P. Beyermann, Y. Yin, Superparamagnetic magnetite colloidal nanocrystal clusters, Angew. Chem. Int. Ed. 46 (2007) 4342-4345.[17] J. Ge, Y. Hu, M. Biasini, W.P. Beyermann, Y. Yin, Superparamagnetic magnetite colloidal nanocrystal clusters, Angew. Chem. Int. Ed. 46 (2007) 4342-4345.
18. [18] Y. Hu, Y. Sun, Stable magnetic hot spots for simultaneous concentration and ultrasensitive SERS detection of solution analytes, J. Phys. Chem. C 116 (2012) 13329-13335.[18] Y. Hu, Y. Sun, Stable magnetic hot spots for simultaneous concentration and ultrasensitive SERS detection of solution analytes, J. Phys. Chem. C 116 (2012) 13329-13335.
19. [19] Y. Hu, Y. Sun, A generic approach for the synthesis of dimer nanoclusters and asymmetric nanoassemblies, J. Am. Chem. Soc. 135 (2013) 2213-2221.[19] Y. Hu, Y. Sun, A generic approach for the synthesis of dimer nanoclusters and asymmetric nanoassemblies, J. Am. Chem. Soc. 135 (2013) 2213-2221.
20. [20] Y. Hu, Z. Li, Y. Sun, Enhanced photocatalysis by hybrid hierarchical assembly of plasmonic nanocrystals with high surface areas, Catal. Today 225 (2014) 177-184.[20] Y. Hu, Z. Li, Y. Sun, Enhanced photocatalysis by hybrid hierarchical assembly of plasmonic nanocrystals with high surface areas, Catal. Today 225 (2014) 177-184.
21. [21] Y. Hu, Y. Liu, Z. Li, Y. Sun, Highly asymmetric, interfaced dimers made of Au nanoparticles and bimetallic nanoshells: synthesis and photo-enhanced catalysis, Adv. Funct. Mater. 24 (2014) 2828-2836.[21] Y. Hu, Y. Liu, Z. Li, Y. Sun, Highly asymmetric, interfaced dimers made of Au nanoparticles and bimetallic nanoshells: synthesis and photo-enhanced catalysis, Adv. Funct. Mater. 24 (2014) 2828-2836.
22. [22] Y.G. Sun, L. Wang, Y. Liu, Y. Ren, Birnessite-type MnO₂ nanosheets with layered structures under high pressure: elimination of crystalline stacking faults and oriented laminar assembly, Small 10 (2014), http://dx.doi.org/10.1002/ smll.201400892.[22] Y.G. Sun, L. Wang, Y. Liu, Y. Ren, Birnessite-type MnO₂ nanosheets with layered structures under high pressure: elimination of crystalline stacking faults and oriented laminar assembly, Small 10 (2014), http://dx.doi.org/10.1002/ smll.201400892.
23. [23] Y. Sun, Y. Liu, T.T. Truong, Y. Ren, Thermal transformation of d-MnO₂ nanoflowers studied by in-situ TEM, Sci. China Chem. 55 (2012) 2346-2352.[23] Y. Sun, Y. Liu, T.T. Truong, Y. Ren, Thermal transformation of d-MnO₂ nanoflowers studied by in-situ TEM, Sci. China Chem. 55 (2012) 2346-2352.

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Encapsulation of superparamagnetic Fe₃O₄@SiO₂ core/shell nanoparticles in MnO₂ microflowers with high surface areas

通讯作者: Yu-Gang Sun,

English

Encapsulation of superparamagnetic Fe₃O₄@SiO₂ core/shell nanoparticles in MnO₂ microflowers with high surface areas

Corresponding author: Yu-Gang Sun,

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