|
|||||
|
|
Effect of surface ethoxy groups on photoactivity of TiO2 nanocrystals |
|
| Authors: | Lihong Tian Kejian DengLiqun Ye Lin Zan |
| Institution: | a College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, PR China b College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, PR China c Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission and Ministry of Education, South-Central University for Nationalities, Wuhan, 430074, PR China |
| Abstract: | TiO2 nanocrystals modified by ethoxy groups were prepared by a facile nonhydrolytic solvothermal method and characterized by XRD, TEM, TG-DTA and XPS, which showed an enhanced visible-light photocatalytic activity on the degradation of Rhodamine B compared with TiO2 modified by benzyloxy groups and the “naked” TiO2. The adsorption and degradation pathway of Rhodamine B on TiO2 modified by ethoxy groups were also investigated. The zeta-potential (ζ) results showed that the TiO2 modified by ethoxy groups had high negative surface charge, which incited the positive -N(Et)2 group of RhB absorbing on the TiO2 surface and preferably led the N-dealkylation pathway under visible light irradiation. |
| Keywords: | TiO2 nanocrystal Ethoxy group Solvothermal synthesis Photocatalytic activity |
| 本文献已被 ScienceDirect 等数据库收录！ | |