Journal
NANOTECHNOLOGY
Volume 27, Issue 29, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/27/29/295703
Keywords
alpha-Fe2O3 nanoblades; oxygen vacancies; dislocations; pores; photocatalytic activity
Funding
- National Key Basic Research Development Program of China [2012CB722705]
- Natural Science Foundation for Outstanding Young Scientists in Shandong Province, China [JQ201002]
- High-end Foreign Experts Recruitment Program [GDW20143500163, GDW20133400112]
- Top-notch Innovative Talent Program of Qingdao City [13-CX-8]
- Taishan Scholar Program of Shandong Province, China
- National Science Foundation under NSF CAREER [CMMI-1056611]
- NSERC
- EWR Steacie Memorial Fellowship
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1056611] Funding Source: National Science Foundation
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Bicrystalline alpha-Fe2O3 nanoblades (NBs) synthesized by thermal oxidation of iron foils were reduced in vacuum, to study the effect of reduction treatment on microstructural changes and photocatalytic properties. After the vacuum reduction, most bicrystalline alpha-Fe2O3 NBs transform into single-layered NBs, which contain more defects such as oxygen vacancies, perfect dislocations and dense pores. By comparing the photodegradation capability of non-reduced and reduced alpha-Fe2O3 NBs over model dye rhodamine B (RhB) in the presence of hydrogen peroxide, we find that vacuum-reduction induced microstructural defects can significantly enhance the photocatalytic efficiency. Even after 10 cycles, the reduced alpha-Fe2O3 NBs still show a very high photocatalytic activity. Our results demonstrate that defect engineering is a powerful tool to enhance the photocatalytic performance of nanomaterials.
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