Abstract
Core-shell structured particles were prepared from carbonized zeolitic imidazolate frameworks (ZIFs) and reduced graphene oxide (rGO). The particles possess a nitrogen content of up to 10.6%. The loss of nitrogen from the ZIF is avoided by utilizing the reduction and agglomeration of graphene oxide with suitable size (>2 μm) during pyrolysis. The resulting carbonized ZIF@rGO particles were deposited on a glassy carbon electrode to give an amperometric sensor for H2O2, typically operated at a voltage of −0.4 V (vs. Ag/AgCl). The sensor has a wide detection range (from 5 × 10−6 to 2 × 10−2 M), a 3.3 μM (S/N = 3) detection limit and a 0.272 μA·μM−1·cm−2 sensitivity, much higher than that of directly carbonized ZIFs. The sensor material was also deposited on a screen-printed electrode to explore the possibility of application. [Figure not available: see fulltext.].
Original language | English |
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Article number | 501 |
Journal | Microchimica Acta |
Volume | 185 |
Issue number | 11 |
DOIs | |
State | Published - 1 Nov 2018 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2018, Springer-Verlag GmbH Austria, part of Springer Nature.
Keywords
- Electrocatalyst
- Electrochemical sensor
- HO
- Nitrogen doped carbon
- Screen-printed electrode
ASJC Scopus subject areas
- Analytical Chemistry