Home
Resources
Publications
Direct observation of oxygen-vacancy formation and structural changes in Bi 2 WO 6 nanoflakes induced by electron irradiation

Direct observation of oxygen-vacancy formation and structural changes in Bi 2 WO 6 nanoflakes induced by electron irradiation

Hong-Long Shi, Bin Zou, Zi-An Li, Min-Ting Luo, Wen-Zhong Wang

Beilstein J Nanotechnol. 2019 Jul 18;10:1434-1442.

PMID: 31431855

Abstract:

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.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP13595874	Bismuth tungsten oxide		13595-87-4	Price

As a specialist in analytical chemical Products, Alfa Chemistry offers consumers a wealth of raw materials and a full range of technologies and services.

QUICK LINKS

HEADQUARTERS

Tel:

Fax:

Email: