首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Low‐Potential Sensitive Hydrogen Peroxide Detection Based on Nanotubular TiO2 and Platinum Composite Electrode
Authors:Xiaoli Cui  Zhizhou Li  Yanchao Yang  Wei Zhang  Qingfei Wang
Institution:1. Department of Materials Science, Fudan University, Shanghai, 200433, P.?R. China;2. College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang, 050016, P.?R. China
Abstract:In this work, a novel sensor for detecting hydrogen peroxide was constructed on the base of nanotubular TiO2 and platinum nanoparticles. The morphology, structural, and electrochemical properties of the Pt/TiO2 nanocomposite electrodes were characterized by SEM, XRD and electrochemical methods. With an operating potential of +0.3 V versus Ag/AgCl, the sensor produces catalytic oxidation currents at the nanocomposite electrode, which can be exploited for quantitative determinations. The amperometric signals are linearly proportional to hydrogen peroxide concentration in the range 4×10?6 to 1.25×10?3 M. The regression equation is I (μA)=0.85 c (mM)+0.16 with a correction coefficient of 0.997. At a signal‐to‐noise ratio of 3, a detection limit of 4.0 μM H2O2 can be observed for the nanocomposite electrode. In addition, the sensor has a good stability and reproducibility. The construction process is simple and inexpensive. The results demonstrated that nanotubular TiO2 exhibits great prospect for developing a class of ideal and novel bioreactors and biosensors.
Keywords:Nanotubular TiO2  Platinum nanoparticles  Amperometric response  Hydrogen peroxide sensor
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号