Abstract
The modification of transition metal oxide by introducing with heteroatoms is a valid strategy to enhance artificial enzyme activities benefited from the change of the catalytic process and electronic properties. Herein, a simple hydrothermal method has been used to fabricate Mo-NiCo2O4 (MNCO) via introducing Mo6+ into NiCo2O4 (NCO). Compared with pure NiCo2O4, the acquired NiCo2O4 (MNCO) with the introduction of Mo exhibits better catalytic activity of peroxidase mimic enzyme. More interesting, only·O2- and h+ can be captured during catalytic process when MNCO as artificial enzyme, while·OH,·O2- and h+ can be found in the presence of NCO. Meanwhile, after the introduction of Mo, electron transfer has been drastically accelerated which contributed to the enhanced peroxidase-like activity. The Km value of H2O2 of NCO is 49-fold higher than that of MNCO, indicating that better affinity between MNCO and H2O2. And the LOD (detection limit) of MNCO is 22 times lower than that of NCO in the detection of H2O2. Based on excellent peroxidase-like active, a sensing platform for detecting hydroquinone in seawater is designed, confirming the great practicability in sensing fields.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: Colloids and Surfaces A: Physicochemical and Engineering Aspects
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.