物理化学学报
物理化學學報
물이화학학보
ACTA PHYSICO-CHIMICA SINICA
2001年
3期
286-288
,共3页
刘鸿%吴鸣%吴合进%孙福侠%郑云%李文钊
劉鴻%吳鳴%吳閤進%孫福俠%鄭雲%李文釗
류홍%오명%오합진%손복협%정운%리문쇠
光催化%二氧化钛%电化学阻抗谱
光催化%二氧化鈦%電化學阻抗譜
광최화%이양화태%전화학조항보
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.
