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Direct observation of oxygen-vacancy formation and structural changes in Bi2WO6 nanoflakes induced by electron irradiation
Shi, Hong-long1; Zhou, Bin1; Li, Zi-an2; Luo, Min-ting3; Wang, Wen-zhong1
2019-07-18
Source PublicationBEILSTEIN JOURNAL OF NANOTECHNOLOGY
ISSN2190-4286
Volume10Pages:1434-1442
AbstractThe prominent role of oxygen vacancies in the photocatalytic performance of bismuth tungsten oxides is well recognized, while the underlying formation mechanisms remain poorly understood. Here, we use the transmission electron microscopy to investigate the formation of oxygen vacancies and the structural evolution of Bi2WO6 under in situ electron irradiation. Our experimental results reveal that under 200 keV electron irradiation, the breaking of relatively weak Bi-O bonds leads to the formation of oxygen vacancies in Bi2WO6. With prolonged electron irradiation, the reduced Bi cations tend to form Bi clusters on the nanoflake surfaces, and the oxygen atoms are released from the nanoflakes, while the W-O networks reconstruct to form WO3. A possible mechanism that accounts for the observed processes of Bi cluster formation and oxygen release under energetic electron irradiation is also discussed.
Keywordbismuth tungsten oxide electron diffraction electron irradiation nanoflakes oxygen vacancies
DOI10.3762/bjnano.10.141
Language英语
WOS KeywordENHANCED PHOTOCATALYTIC ACTIVITY ; CO2 REDUCTION ; BEAM ; CRYSTAL ; TRANSFORMATION ; MICROSPHERES ; GROWTH ; DAMAGE
Funding ProjectNational Natural Science Foundation of China[11604394] ; National Natural Science Foundation of China[11447703]
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Physics
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
Funding OrganizationNational Natural Science Foundation of China
WOS IDWOS:000476925700001
PublisherBEILSTEIN-INSTITUT
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/30354
Collection中国科学院过程工程研究所
Corresponding AuthorShi, Hong-long; Li, Zi-an
Affiliation1.Minzu Univ China, Sch Sci, Beijing 100081, Peoples R China
2.Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
3.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Shi, Hong-long,Zhou, Bin,Li, Zi-an,et al. Direct observation of oxygen-vacancy formation and structural changes in Bi2WO6 nanoflakes induced by electron irradiation[J]. BEILSTEIN JOURNAL OF NANOTECHNOLOGY,2019,10:1434-1442.
APA Shi, Hong-long,Zhou, Bin,Li, Zi-an,Luo, Min-ting,&Wang, Wen-zhong.(2019).Direct observation of oxygen-vacancy formation and structural changes in Bi2WO6 nanoflakes induced by electron irradiation.BEILSTEIN JOURNAL OF NANOTECHNOLOGY,10,1434-1442.
MLA Shi, Hong-long,et al."Direct observation of oxygen-vacancy formation and structural changes in Bi2WO6 nanoflakes induced by electron irradiation".BEILSTEIN JOURNAL OF NANOTECHNOLOGY 10(2019):1434-1442.
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