Abstract
In this work, gold nanoparticles were synthesized, the introduction of Hg2+ led to the formation of Au-Hg amalgam, which was found to possess an enhanced peroxidase-mimicking activity towards H2O2-mediated oxidation of 3, 3′, 5, 5′-Tetramethylbenzidine (colorless) to produce a blue product. This color reaction was exploited as a sensitive and selective method for colorimetric detection of Hg2+ and H2O2, the linear ranges were 0.1–5nM and 0.5–100μM, respectively. Furthermore, a test strip was successfully designed, it exhibited high sensitive, rapid and low cost for Hg2+ and H2O2 detection. More importantly, the colorimetric method could be successfully applied to real sample application in solution and in a test strip.
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