Journal
ANALYST
Volume 137, Issue 8, Pages 1922-1929Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2an16268g
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Funding
- National Natural Science Foundation of China [20675055, 21175096]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Ph.D. Programs Foundation of Ministry of Education of China [20093201110004]
- Natural Science Foundation of Jiangsu Province [BK2009111]
- Project of Science and Technology of Suzhou [SYJG0901]
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With TiO2 nanoparticles as carrier, a supported nano-material of Au atomic cluster/TiO2 nano-hybrid was synthesized. It was then modified onto the surface of indium tin oxide (ITO) by Nafion to act as a working electrode for exciting the electrochemiluminescence (ECL) of luminol. The properties of the nano-hybrid and the modified electrode were characterized by XRD, XPS, electronic microscopy, electrochemistry and spectroscopy. The experimental results demonstrated that the modification of this nano-hybrid onto the ITO electrode efficiently intensified the ECL of luminol. It was also revealed that the ECL intensity of luminol on this modified electrode showed very sensitive responses to oxygen and hydrogen peroxide. The detection limits for dissolved oxygen and hydrogen peroxide were 2 mu g L-1 and 5.5 x 10(-12) M, respectively. Besides the discussion of the intensifying mechanism of this nano-hybrid for ECL of luminol, the developed method was also applied for monitoring dissolved oxygen and evaluating the scavenging efficiency of reactive oxygen species of the Ganoderma lucidum spore.
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