Enhanced Visible Light Activity of Ag-loaded TiO2 Nanotube Arrays by AC Electrodeposition

摘要：

　　In this work,highly-ordered TiO2 nanotube arrays were prepared by constant-voltage anodization,followed by electrodeposition of Ag to obtain Ag-loaded TiO2 (Ag-TiO2) nanotube arrays via alternating current (AC) process.The results of SEM and XRD showed that the morphology and crystal structure of Ag-TiO2 layer depended greatly on the electrodeposition parameters.Ag-TiO2 nanotube arrays prepared in 2.5 mmol/L AgNO3 solution by electrodeposition with applied voltage of 12 V for 1 minute performed the best photoelectrochemical current response and photocatalystic activity.The photocurrent density of Ag-TiO2 was 43.32 μA/cm2 under sunlight irradiation (70 mW/cm2),which was 4.2 times as that of unloaded TiO2 nanotube arrays.Methyl orange (MO) degradation rate with the Ag-TiO2 nanotube arrays achieved 52.13% after 90 min sunlight irradiation which was obvious higher than that of TiO2 nanotube arrays.The mechanism of enhancing photoelectrochemical activity of decorating titania with Ag has also been discussed in the view of energy band theory.

关键词： TiO2 nanotube Alternating Current Photocurrent Photocatalystic

作者: Jing Zhao Jianling Zhao Xixin Wang Yuying Jia Chengchun Tang

作者单位: School of Material Science and Engineering,Hebei University of Technology,Tianjin 300130,China

会议类型: 国际会议

会议名称: The Seventh China International Conference on High-Performance Ceramics (第七届先进陶瓷国际研讨会(CICC-7))

会议地点: 厦门

会议语种:英文

页码: 1708-1712

在线出版日期: 2011-11-04（万方平台首次上网日期，不代表论文的发表时间）