Citation: XIE Juan, WANG Hu, DUAN Ming. Controlled Growth of Self-Assembled ZnO Thin Films and Characterization of Their Photocatalytic Properties[J]. Acta Physico-Chimica Sinica, ;2011, 27(01): 193-198. doi: 10.3866/PKU.WHXB20110124 shu

Controlled Growth of Self-Assembled ZnO Thin Films and Characterization of Their Photocatalytic Properties

XIE Juan ^1,2 ,
WANG Hu ^1,2, ,
DUAN Ming ¹

1.
1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, P. R. China;
2. College of Materials Science and Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China

Received Date: 27 July 2010
Available Online: 8 December 2010
Fund Project: 油气藏地质及开发工程国家重点实验室开放基金(西南石油大学)(PLN0805)资助项目 (西南石油大学)(PLN0805)

Self-assembled ZnO thin films with controlled sizes were successfully prepared by varying the processing parameters. The films have a photonic band gap, which extends the absorption range to the visible light region. The photocatalytic activities of the ZnO thin films were evaluated by the degradation of methyl orange (MO). The crystal structure of ZnO was characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results show that the ZnO thin films exhibit od photocatalytic activities under sunlight. Furthermore, the photocatalytic activities of the ZnO thin films were highly dependent on sphere size. With an increase in ZnO sphere size, the degradation efficiency toward MO decreased. The photodegradation can be described using a pseudo-first-order kinetics equation.
- ZnO,
- Self-assembly,
- Controlled growth,
- Photonic band gap,
- Photocatalysis
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