Structural,optical, electrical,and photocatalytic properties of manganese doped zinc oxide nanocrystals |
| |
Authors: | Dongfang Zhang |
| |
Institution: | 1.College of Science,Huazhong Agricultural University,Hubei,PR China |
| |
Abstract: | Manganese-doped and undoped ZnO nanocrystals were synthesized via wet-chemical methods. The structure, physico-chemical, electrical
and optical properties of the as-prepared products were characterized by using the X-ray diffraction (XRD), UV-vis diffuse
reflectance spectroscopy (DRS), photoluminescence spectroscopy (PLS) and electrochemical impedance spectroscopy (EIS) techniques.
The photocatalytic activity of Mn-doped ZnO nanocrystal (mixed phases) has been examined under the visible-irradiation by
using photocatalytic oxidation of rhodamine B (RhB) dye as a model reaction, and compared with that of known system such as
pure ZnO nanocrystal (single-phase). The results showed that Mn doped ZnO nanocrystals bleaches RhB much faster than undoped
ZnO upon its exposure to the visible light. The enhancement of the photocatalytic activity was discussed as an effect due
to the Mn doping in the Mn-doped ZnO semiconductors, which shifts the optical absorption edge to the visible region and alters
the electron-hole pair separation conditions. These factors are responsible for the higher photocatalytic performance of Mn/ZnO
composites. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|