Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 252, Issue -, Pages 1010-1015Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2017.06.081
Keywords
Test strips; Peroxidase; Amalgam; Colorimetric; Gold nanoparticles
Funding
- National Natural Science Foundation of China [21301103, 21501106]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, Qingdao Municipal Science and Technology Commission [16-5-1-86-jch]
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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 0.1-5 nM and 0.5-100 mu M, 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. (C) 2017 Elsevier B.V. All rights reserved.
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