Journal
CHEMICAL INDUSTRY & CHEMICAL ENGINEERING QUARTERLY
Volume 19, Issue 3, Pages 359-368Publisher
ASSOC CHEMICAL ENG
DOI: 10.2298/CICEQ120325070X
Keywords
taurine; TiO2-graphene nanocomposite; acetaminophen; caffeine; electropolymerization
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Funding
- National Natural Science Foundation of China [20805040]
- Program for Science and Technology Innovation Talents in Universities of Henan Province [2010HASTIT025]
- Excellent Youth Foundation of He'nan Scientific Committee [104100510020]
- Foundation of He'nan Education Committee [2009A150023]
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A novel electrochemical sensor poly(taurine)/TiO2-graphene nanocomposite modified glassy carbon electrode (PT/TiO2-Gr/GCE) was fabricated. This sensor was based on an electrochemically polymerized taurine layer on a TiO2-graphene modified glassy carbon electrode. The electrochemical behavior of acetaminophen and caffeine at the modified electrode was studied by cyclic voltammetry and differential pulse voltammetiy. The results showed that the oxidation peak currents of acetaminophen and caffeine were linear with their concentrations in the range of 1x10(-7)-9x10(-5) M and 2.5x10(-5)-2x10(-4) M, respectively. The detection limits of acetaminophen and caffeine were 3.4x10(-8) M and 5.0x10(-7) M, respectively (S/N = 3). This modified electrode showed good sensitivity and stability, which has promising potential applications in electrochemical sensors and biosensors design.
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