期刊
APPLIED SURFACE SCIENCE
卷 377, 期 -, 页码 221-227出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2016.03.146
关键词
MoS2 nanodots; Composite with TiO2; Photocatalysis; Charge carrier mechanisms
类别
资金
- National Natural Science Foundation of China [51402193, 51572173, 11402149]
- State Key Laboratory of Heavy Oil Processing [SKLHOP201503]
- Shanghai Talent Development Funding
- Hujiang Foundation of China [B14006]
In this study, MoS2 nanodots modified TiO2 (P25) composite photocatalyst (MoS2/P25) was fabricated via a facile liquid ultrasonic mixing method. Compared to the pure P25, the MoS2/P25 exhibited improved photocatalytic degradation activity under simulated sunlight with rhodamine B (RhB) and methylene blue (MB) as the target pollutants. RhB or MB (40 mL 10 mg/L) completely degraded within 20 min, and the kinetic constant reached 0.221 and 0.253 min(-1) for RhB and MB, respectively. Based on the characterization of transient photocurrent response measurement and UV-vis diffuse reflectance spectra, a possible photocatalytic mechanism was proposed. The enhanced photocatalytic performance was attributed to the heterostructure of P25 and MoS2 nanodots, improving their charge separation and enhancing their absorption capacity to the full sunlight spectrum. We believe that this study will contribute to the development of new photocatalysts and improving the catalytic performance of traditional photocatalysts. (C) 2016 Published by Elsevier B.V.
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