Direct observation of oxygen-vacancy formation and structural changes in Bi2WO6 nanoflakes induced by electron irradiation
文献类型：期刊论文
| 作者 | Shi, Hong-long1; Zhou, Bin1; Li, Zi-an2; Luo, Min-ting3; Wang, Wen-zhong1 |
| 刊名 | BEILSTEIN JOURNAL OF NANOTECHNOLOGY
 |
| 出版日期 | 2019-07-18 |
| 卷号 | 10页码:1434-1442 |
| ISSN号 | 2190-4286 |
| 关键词 | bismuth tungsten oxide electron diffraction electron irradiation nanoflakes oxygen vacancies |
| DOI | 10.3762/bjnano.10.141 |
| 英文摘要 | The 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. |
| WOS关键词 | ENHANCED PHOTOCATALYTIC ACTIVITY ; CO2 REDUCTION ; BEAM ; CRYSTAL ; TRANSFORMATION ; MICROSPHERES ; GROWTH ; DAMAGE |
| 资助项目 | National Natural Science Foundation of China[11604394] ; National Natural Science Foundation of China[11447703] |
| WOS研究方向 | Science & Technology - Other Topics ; Materials Science ; Physics |
| 语种 | 英语 |
| 出版者 | BEILSTEIN-INSTITUT |
| WOS记录号 | WOS:000476925700001 |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/30353]  |
| 专题 | 中国科学院过程工程研究所 |
| 通讯作者 | Shi, Hong-long; Li, Zi-an |
| 作者单位 | 1.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 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：过程工程研究所
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