Abstract
Research on oxidase mimics is challenging but important. In this article, mercury(II) ion enabled citrate-capped silver nanoparticles (Cit–AgNPs) exhibit catalytic activity toward the oxidation of typical chromogenic substrate 3,3′,5,5′-tetramethylbenzidine (TMB) by dissolved oxygen under mild conditions, suggesting a new type of oxidase mimic. In addition, the oxidase-like activity of Cit–AgNPs was sensitive to the concentration of mercury(II) ions and selective towards mercury(II) ions among other metal ions. Based on this, a facile colorimetric mercury(II) ion sensor was developed. Hg2+ was reduced on the surface of Cit–AgNPs to form Hg–Ag alloys. The Hg–Ag alloys activated oxygen and generated superoxide anions, which oxidized TMB. This discovery indicates the potential of nanoparticles for efficient enzyme mimetics.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: 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.
