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Tian T.,Northwestern Polytechnical University | Tian T.,No52 Institute Of China Ordnance Industries
Gongneng Cailiao/Journal of Functional Materials | Year: 2015

The amorphous structure of TiO2 nanotube arrays (Titania Nanotube Arrays, TNA) immersed in AgNO3 solution, and then by proper heat treatment, not only can make the crystal structure of TNA transformed into anatase or rutile, also can be made of cavernous TiO2-Ag composite coating. This paper studied the influence effects of concentration of AgNO3 solution, heat treatment temperature on the TiO2-Ag composite coating structure and performance of photocatalytic hydrogen evolution. The research results show that the concentration of AgNO3 solution has an important effect on TiO2-Ag composite coating morphology and crystal structure. When the concentration of AgNO3 solution was 0.1-0.5 mol/L and heat treatment temperature at 500 ℃, cavernous TiO2-Ag composite coating can be obtained. The coating under ultraviolet visible light illumination conditions, photocatalytic hydrogen production rate achieves 2.14 μmol/cm2·h. © 2015, Journal of Functional Materials. All right reserved. Source


Tian T.,Northwestern Polytechnical University | Tian T.,No52 Institute Of China Ordnance Industries | Tian X.,No52 Institute Of China Ordnance Industries | Zhou H.,No52 Institute Of China Ordnance Industries | And 2 more authors.
Cailiao Kexue yu Gongyi/Material Science and Technology | Year: 2014

To study the effect of silver on the photoelectric property of titania nanotube arrays, the method of optical deposition was employed for the fabrication of Ag modified titania nanotube arrays (TNA), and the photoelectric properties of the samples were characterized by transient photocurrents (I-t), current-voltage (I-V), and electrochemical impedance spectroscopy (EIS). The results indicate that the TNA shows more excellent photoelectric properties because of the existence of Ag, which can debase the inspire energy of the electron transition and increase the diversion way of the photoelectron. Source


Tian T.,Northwestern Polytechnical University | Tian T.,No52 Institute Of China Ordnance Industries | Wang F.,No52 Institute Of China Ordnance Industries | Dong H.-C.,No52 Institute Of China Ordnance Industries | Sun Y.-D.,No52 Institute Of China Ordnance Industries
Gongneng Cailiao/Journal of Functional Materials | Year: 2013

In this paper, the effect of the electrolyte's pH value on the microcosmic images of the titania nanotube arrays was studied. The results indicate that titania nanotube arrays with more regular tube array structure usually formed in electrolyte with pH value 3-5. Current-voltage (I-V), transient photocurrents (I-t) and electrochemical impedance spectroscopy (EIS) were measured to test the photoelectronic and the electrochemistry performance of TiO2 nanotube arrays. The results indicate that the titania nanotube arryas has good photoelectronic and electrochemistry performance after heat-treated, and appears obvious electrochemistry character with high frequency resistance and low frequency capacitance. Source

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