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Veerakumar P, Chen SM, Madhu R, Veeramani V, Hung CT, Liu SB. Nickel Nanoparticle-Decorated Porous Carbons for Highly Active Catalytic Reduction of Organic Dyes and Sensitive Detection of Hg(II) Ions. ACS APPLIED MATERIALS & INTERFACES 2015; 7:24810-21. [PMID: 26479076 DOI: 10.1021/acsami.5b07900] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
High surface area carbon porous materials (CPMs) synthesized by the direct template method via self-assembly of polymerized phloroglucinol-formaldehyde resol around a triblock copolymer template were used as supports for nickel nanoparticles (Ni NPs). The Ni/CPM materials fabricated through a microwave-assisted heating procedure have been characterized by various analytical and spectroscopic techniques, such as X-ray diffraction, field emission transmission electron microscopy, vibrating sample magnetometry, gas physisorption/chemisorption, thermogravimetric analysis, and Raman, Fourier-transform infrared, and X-ray photon spectroscopies. Results obtained from ultraviolet-visible (UV-vis) spectroscopy demonstrated that the supported Ni/CPM catalysts exhibit superior activity for catalytic reduction of organic dyes, such as methylene blue (MB) and rhodamine B (RhB). Further electrochemical measurements by cyclic voltammetry (CV) and differential pulse voltammetry (DPV) also revealed that the Ni/CPM-modified electrodes showed excellent sensitivity (59.6 μA μM(-1) cm(-2)) and a relatively low detection limit (2.1 nM) toward the detection of Hg(II) ion. The system has also been successfully applied for the detection of mercuric ion in real sea fish samples. The Ni/CPM nanocomposite represents a robust, user-friendly, and highly effective system with prospective practical applications for catalytic reduction of organic dyes as well as trace level detection of heavy metals.
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Affiliation(s)
| | - Shen-Ming Chen
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology , Taipei 10608, Taiwan
| | - Rajesh Madhu
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology , Taipei 10608, Taiwan
| | - Vediyappan Veeramani
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology , Taipei 10608, Taiwan
| | - Chin-Te Hung
- Institute of Atomic and Molecular Sciences, Academia Sinica , Taipei 10617, Taiwan
| | - Shang-Bin Liu
- Institute of Atomic and Molecular Sciences, Academia Sinica , Taipei 10617, Taiwan
- Department of Chemistry, National Taiwan Normal University , Taipei 11677, Taiwan
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Rumpf K, Granitzer P, Hilscher G, Albu M, Poelt P. Magnetically interacting low dimensional Ni-nanostructures within porous silicon. MICROELECTRONIC ENGINEERING 2012; 90:83-87. [PMID: 22308049 PMCID: PMC3242907 DOI: 10.1016/j.mee.2011.05.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Electrodeposition of ferromagnetic metals, a common method to fabricate magnetic nanostructures, is used for the incorporation of Ni structures into the pores of porous silicon templates. The porous silicon is fabricated in various morphologies with average pore-diameters between 40 and 95 nm and concomitant pore-distances between 60 and 40 nm. The metal nanostructures are deposited with different geometries as spheres, ellipsoids or wires influenced by the deposition process parameters. Furthermore small Ni-particles with diameters between 3 and 6 nm can be deposited on the walls of the porous silicon template forming a metal tube. Analysis of this tube-like arrangement by transmission electron microscopy (TEM) shows that the distribution of the Ni-particles is quite narrow, which means that the distance between the particles is smaller than 10 nm. Such a close arrangement of the Ni-particles assures magnetic interactions between them. Due to their size these small Ni-particles are superparamagnetic but dipolar coupling between them results in a ferromagnetic behavior of the whole system. Thus a semiconducting/ferromagnetic hybrid material with a broad range of magnetic properties can be fabricated. Furthermore this composite is an interesting candidate for silicon based applications and the compatibility with today's process technology.
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Affiliation(s)
- K. Rumpf
- Institute of Physics, Karl Franzens University Graz, Universitaetsplatz 5, A-8010 Graz, Austria
| | - P. Granitzer
- Institute of Physics, Karl Franzens University Graz, Universitaetsplatz 5, A-8010 Graz, Austria
| | - G. Hilscher
- Institute of Solid State Physics, Vienna University of Technology, Wiedner Hauptstr. 8, 1040 Vienna, Austria
| | - M. Albu
- Institute for Electron Microscopy, University of Technology Graz, Steyrergasse 17, A-8010 Graz, Austria
| | - P. Poelt
- Institute for Electron Microscopy, University of Technology Graz, Steyrergasse 17, A-8010 Graz, Austria
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Bräuer B, Fronk M, Lehmann D, Zahn DRT, Salvan G. Magneto-Optical Kerr Effect Spectroscopy—A Sensitive Tool for Investigating the Molecular Orientation in Organic Semiconductor Films. J Phys Chem B 2009; 113:14957-61. [DOI: 10.1021/jp9073224] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Björn Bräuer
- SIMES Center, SLAC National Accelerator Laboratory, Stanford University, Stanford, California 94309, and Physics Department, Chemnitz University of Technology, 09107 Chemnitz, Germany
| | - Michael Fronk
- SIMES Center, SLAC National Accelerator Laboratory, Stanford University, Stanford, California 94309, and Physics Department, Chemnitz University of Technology, 09107 Chemnitz, Germany
| | - Daniel Lehmann
- SIMES Center, SLAC National Accelerator Laboratory, Stanford University, Stanford, California 94309, and Physics Department, Chemnitz University of Technology, 09107 Chemnitz, Germany
| | - Dietrich R. T. Zahn
- SIMES Center, SLAC National Accelerator Laboratory, Stanford University, Stanford, California 94309, and Physics Department, Chemnitz University of Technology, 09107 Chemnitz, Germany
| | - Georgeta Salvan
- SIMES Center, SLAC National Accelerator Laboratory, Stanford University, Stanford, California 94309, and Physics Department, Chemnitz University of Technology, 09107 Chemnitz, Germany
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Bräuer B, Grobosch M, Knupfer M, Weigend F, Vaynzof Y, Kahn A, Rüffer T, Salvan G. How Photoelectron Spectroscopy and Quantum Chemical Studies Can Help Understanding the Magnetic Properties of Molecules: An Example from the Class of Cu(II)−Bis(oxamato) Complexes. J Phys Chem B 2009; 113:10051-4. [DOI: 10.1021/jp9019552] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Björn Bräuer
- Department of Physics, Chemnitz University of Technology, 09107 Chemnitz, Germany, IFW Dresden, P.O. Box 270116, D-01171 Dresden, Germany, Institute for Nanotechnology, Forschungszentrum Karlsruhe, Postfach 3640, D-76021 Karlsruhe, Germany, and Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544
| | - Mandy Grobosch
- Department of Physics, Chemnitz University of Technology, 09107 Chemnitz, Germany, IFW Dresden, P.O. Box 270116, D-01171 Dresden, Germany, Institute for Nanotechnology, Forschungszentrum Karlsruhe, Postfach 3640, D-76021 Karlsruhe, Germany, and Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544
| | - Martin Knupfer
- Department of Physics, Chemnitz University of Technology, 09107 Chemnitz, Germany, IFW Dresden, P.O. Box 270116, D-01171 Dresden, Germany, Institute for Nanotechnology, Forschungszentrum Karlsruhe, Postfach 3640, D-76021 Karlsruhe, Germany, and Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544
| | - Florian Weigend
- Department of Physics, Chemnitz University of Technology, 09107 Chemnitz, Germany, IFW Dresden, P.O. Box 270116, D-01171 Dresden, Germany, Institute for Nanotechnology, Forschungszentrum Karlsruhe, Postfach 3640, D-76021 Karlsruhe, Germany, and Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544
| | - Yana Vaynzof
- Department of Physics, Chemnitz University of Technology, 09107 Chemnitz, Germany, IFW Dresden, P.O. Box 270116, D-01171 Dresden, Germany, Institute for Nanotechnology, Forschungszentrum Karlsruhe, Postfach 3640, D-76021 Karlsruhe, Germany, and Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544
| | - Antoine Kahn
- Department of Physics, Chemnitz University of Technology, 09107 Chemnitz, Germany, IFW Dresden, P.O. Box 270116, D-01171 Dresden, Germany, Institute for Nanotechnology, Forschungszentrum Karlsruhe, Postfach 3640, D-76021 Karlsruhe, Germany, and Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544
| | - Tobias Rüffer
- Department of Physics, Chemnitz University of Technology, 09107 Chemnitz, Germany, IFW Dresden, P.O. Box 270116, D-01171 Dresden, Germany, Institute for Nanotechnology, Forschungszentrum Karlsruhe, Postfach 3640, D-76021 Karlsruhe, Germany, and Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544
| | - Georgeta Salvan
- Department of Physics, Chemnitz University of Technology, 09107 Chemnitz, Germany, IFW Dresden, P.O. Box 270116, D-01171 Dresden, Germany, Institute for Nanotechnology, Forschungszentrum Karlsruhe, Postfach 3640, D-76021 Karlsruhe, Germany, and Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544
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