Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 794, Issue -, Pages 127-136Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.04.239
Keywords
{101} facets; [101] and [001]; Surface oxygen vacancy; BiOF; Photocatalysis
Categories
Funding
- National Science Foundation of China [21377060]
- Project of Science and Technology Infrastructure of Jiangsu [BM201380277]
- Key Project of Environmental Protection Program of Jiangsu [2013005]
- Jiangsu province graduate training innovation project [SJCX17_0262, SJZZ16_0153, KYCX17_0894, KYCX17_0895]
- Jiangsu province undergraduate practice and innovation project [201810300043Z, 201810300240]
- Six Talent Climax Foundation of Jiangsu [20100292]
- 333 Outstanding Youth Scientist Foundation of Jiangsu [20112015]
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So far, BiOF nanodisks exposed with {101} facets have not been reported. In this work, BiOF mainly exposed with {101} facets, instead of common {001} facets, are synthesized at different pH values via a simple hydrothermal method. It is interesting that BiOF thick rectangular plates and thin round nanodisks are formed through the growth preferential along [001] and [101] directions, respectively. On the base of layered crystallography structure, the preferential growth along [001] direction favors to form a thick multi-layered structure, whereas [101] direction for a thin fewer-layered structure. Moreover, more surface oxygen vacancies are contained in thin nanodisks, which reduces the band gap and improves charge transfer and separation. As a result, BiOF round nanodisks show an activity 7.9 times higher than rectangular plates for the degradation of rhodamine B (RhB) under ultraviolet light irradiation (lambda <= 400 nm). (c) 2019 Elsevier B.V. All rights reserved.
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