期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 584, 期 -, 页码 356-362出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2013.09.063
关键词
p-n Junction; Photooxidation; Photocurrent; Carrier density; Multi-factor effect
资金
- Nature Science Foundation of China [50927201]
- National Basic Research Program of China [2009CB939705, 2009CB939702]
In this work, the NiO/TiO2 porous films with different weight-ratios were prepared by the screen-printing technique. To uncover the roles of gas molecules and the junction on the carrier migration, the photocurrent measurements in methanol were employed. The corresponding experiments were performed in a high-throughput platform where the concentration of target gas and the applied bias voltage were both precisely controlled. Our results revealed that not only the p-n junction but also methanol had a distinct enhancement effect on the photocurrent. Furthermore, the synergistic effect was further confirmed by a quantitative formula of multi-factor effect (ME) based on the carrier density. In addition, a new insight into gas molecule photooxidation on the coupling catalyst was provided, which was of great significance for potential application to photocatalytic degradation and gas sensing. (c) 2013 Elsevier B.V. All rights reserved.
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