M-Nx (M = Fe, Co, Ni, Cu) doped graphitic nanocages with High specific surface Area for non-enzymatic electrochemical detection of H2O2
| Autor: | Zhao Min Sheng, Zhi Wei Han, Run Ping Jia, Zu Zhong Gan, Rui Liang Niu, Huan Huang |
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| Rok vydání: | 2020 |
| Předmět: |
Nanocomposite
Materials science Doping Metals and Alloys 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Metal Nanocages Chemical engineering visual_art Specific surface area Materials Chemistry visual_art.visual_art_medium Electrical and Electronic Engineering 0210 nano-technology Selectivity Mesoporous material Instrumentation |
| Zdroj: | Sensors and Actuators B: Chemical. 305:127550 |
| ISSN: | 0925-4005 |
| DOI: | 10.1016/j.snb.2019.127550 |
| Popis: | N-doped porous-walled graphitic nanocages (NGCs) with high specific surface area have been successfully doped by metallic ions (M2+ = Fe2+, Co2+, Ni2+ or Cu2+) for efficiently detecting H2O2. To increase surface area, NGCs were prepared by partially removing N-doped template inserted in their graphitic layers to sharply create nanopores in graphitic shells of nanocages, which were approached from removing ferrous cores of core-shell precursor (Fe3C@NDC) synthesized from short-time floating catalytic pyrolysis. With high specific surface area (920 m2 g−1), mesopore volume (1.6 cm3 g−1) and good graphitization, the synergistic effects of metallic ions and N-doped structure, which improves their dispersion and increases active sites, plays a very important role in detection of H2O2. Fe-N coordination much easier forms in the condition of our experiment than Co-N, Ni-N and Cu-N, which might lead to better electrochemical performance of Fe-Nx doped graphitic nanocages (Fe-NGCs), including wider linear range (0.001−5 mM), lower LOD (0.53 μM), higher sensitivity (184.4 μA mM−1 cm-2), selectivity and stability. Such results demonstrate Fe-NGCs nanocomposite is a promising candidate for the detection of H2O2 in practical application. |
| Databáze: | OpenAIRE |
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