氢处理二氧化钛的光催化性能及电化学阻抗谱
TiO2 treated in hydrogen atmosphere showed enhanced photocatalytic activity in degrading the sulfosalicylic acid (Ssal).The results of the electrochemical impedance spectroscopy (EIS) investigation showed that the diameters of the capacitive arcs for the H- TiO2 were much smaller than those of bare TiO2 and thermally treated TiO2 in air,indicating that the charge transfer of the H-TiO2 occurs more rapidly,thus inviting a higher photocatalytic activity.When an external bias was applied on the H-TiO2,the arc of the EIS Nyquist plot decreased obviously than without the bias,suggesting more efficient separation of the photo-generated carriers.
作 者: 刘鸿 吴鸣 吴合进 孙福侠 郑云 李文钊 Liu Hong Wu Ming WU He-jin SUN Fu-xia Zheng Yun LI Wen-Zhao 作者单位: 中国科学院大连化学物理研究所 , 刊 名: 物理化学学报 ISTIC SCI PKU 英文刊名: ACTA PHYSICO-CHIMICA SINICA 年,卷(期): 2001 17(3) 分类号: O64 关键词: 光催化 二氧化钛 电化学阻抗谱