Abstract
Herein, we successfully dispersed nickel nitride nanosheets (Ni3N NSs) on various carbon matrices (i.e. graphene, macroporous carbon, carbon nanotube and hollow carbon fiber) through nitridation treatment of precursors. Characterization results demonstrated that Ni3N-PCF (hollow and porous carbon fiber) owned the 3D hollow and tubular architecture, abundant meso/macropores and large BET surface area compared with other control samples. Ni3N-PCF exhibit the best H2O2 and glucose detection abilities than another four samples because of the synergistic effect of metallic character of Ni3N, excellent electroconductibility of PCF and structural advantages of hierarchically meso/macroporous architectures. It afforded wide linear ranges (from 0.001 to 2.08 mM and 2.08–50.50 mM) and large sensitivity values (51.81 and 38.32 uA cm−2 mM−1) for H2O2 detection. Furthermore, it also displayed wide linear ranges (0.001–1.75 mM and 1.75–9.18 mM), large sensitivity values (1620.31 and 856.40 uA cm−2 mM−1) and a small response time (1.7 s) toward glucose detection. In addition, Ni3N-PCF can be used for detecting glucose concentrations in blood serums with satisfying results. Ni3N-PCF also revealed good reproducibility, good stability, and superior selectivity toward either H2O2 or glucose detection. This work opens new approach for boosting electroanalysis abilities of Ni based materials.
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