期刊
MATERIALS RESEARCH BULLETIN
卷 140, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2021.111291
关键词
TiO2 nanorods; Phase junction; Ti3+; Oxygen vacancies; Carriers transfer channel
资金
- National Natural Science Foundation of China [52076126]
- Natural Science Foundation of Shanghai [18ZR1416200]
- Key Laboratory of Clean Power Generation and Environmental Protection Technology in Mechanical Industry
In this study, titanium dioxide phase junction nanorods with Ti3+ and oxygen vacancies were successfully prepared and utilized for photocatalytic removal of gas phase mercury, showing significantly enhanced efficiency compared to commercial P25. The synergy between phase junction, Ti3+, and O-v in promoting electron-hole separation and transfer efficiency was demonstrated, providing new insights into effective solar energy utilization and photocatalyst design.
The titanium dioxide phase junction nanorods with Ti3+ and oxygen vacancies (O-v) were successfully prepared by in-situ growth method and vacuum freeze-drying, which was used for photocatalytic removal of gas phase mercury. Experimental results and characterization data indicate that the phase junction, Ti3+ and O-v synergistically promote photogenerated electron-hole separation and transfer efficiency and photocatalytic activity. The efficiency of the most efficient sample reaches 63.77 %, which is about 3.6 times that of commercial P25. Finally, we proposed the reaction mechanism that the phase junction, Ti3+ and Ov in TiO2 nanorods form an effective charge transport channel. This work provides new ideas for the effective utilization of solar energy and the design of photocatalysts.
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