Yu L.,China University of Petroleum - East China |
Yu L.,Shandong Colleges and Universities Key Laboratory of New Energy Physics and Materials Science |
Zhang Z.,China University of Petroleum - East China |
Zhang Z.,Shandong Colleges and Universities Key Laboratory of New Energy Physics and Materials Science |
And 8 more authors.
Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) | Year: 2015
Ag modified TiO2 nanotube arrays was prepared by anodic oxidation and photodeposition methods. The crystal type and morphology of the samples were analyzed by X-ray diffraction and SEM techniques. And the photoelectrochemical properties were investigated using I-E, photopotential, photocurrent response, and Mott-Schottky through electrochemical workstation with three-electrode system. The results show that the inside diameter of TiO2 nanotube arrays is approximately 60 nm with wall thickness of 30 nm, and the diameter of Ag nanoparticle is about 15~20 nm. The influence of photodeposition time on the Ag size is little, which only increases the deposition amount of Ag. Ag modification can effectively promote the separation of electrons and holes, through which the efficiency of light utilization is improved. The Ag-TiO2 nanotube arrays present excellent photoelectrochemical properties under the xenon lamp illumination, in which the photocurrent, carrier density, photoconversion efficiency can reach 0.28 mA/cm2, 2.21×1022 cm-3, and 4.10%, respectively. ©, 2015, Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science). All right reserved.