Design and synthesis of 3D hierarchical NiMoS4 nanowire arrays in situ grown on graphene foam: electrochemical determination of epinephrine

It is crucial to design and construct highly sensitive electrode materials for the detection of biomolecules. In this paper, 3D hierarchical NiMoS4 NWAs@GF was designed for the detection of epinephrine (EP). The 3D GF has a pore size of 200 mu m as a conducting matrix with remarkable electronic conductivity. The grass-like NiMoS4 NWAs on the GF have a length of about 20 mu m and the diameter about 180 nm, which not only increase the specific surface area but also provide more active sites. As expected, the NiMoS4 NWAs@GF/ITO electrode showed a remarkable electrochemical performance in the detection of EP in a wide concentration range (0-60 mu M), with a high sensitivity of 3.93 mu A mu M-1, and a low detection limit of 0.02 mu M (S/N=3). In addition, it can be used to determine EP in real samples. The NiMoS4 NWAs@GF/ITO electrode is proven to be a reliable and sensitive biosensor electrode.

Automated summary

In this paper, a 3D hierarchical electrode material was designed for the detection of epinephrine, showing remarkable electrochemical performance and high sensitivity. It can be applied to real samples.