Probing the light harvesting and charge rectification of bismuth nanoparticles behind the promoted photoreactivity onto Bi/BiOCl catalyst by (in-situ) electron microscopy

Advanced search
Browse by:

Department | Year

UCL Theses | Latest

Deposit your research

Probing the light harvesting and charge rectification of bismuth nanoparticles behind the promoted photoreactivity onto Bi/BiOCl catalyst by (in-situ) electron microscopy

Chang, X; Xie, L; Sha, WEI; Lu, K; Qi, Q; Dong, C; Yan, X; ... Wang, P; + view all (2017) Probing the light harvesting and charge rectification of bismuth nanoparticles behind the promoted photoreactivity onto Bi/BiOCl catalyst by (in-situ) electron microscopy. Applied Catalysis B: Environmental , 201 pp. 495-502. 10.1016/j.apcatb.2016.08.049. Green open access

[thumbnail of Xiaofeng ChangUQ408452_OA.pdf]

Preview

Text
Xiaofeng ChangUQ408452_OA.pdf - Accepted Version
Download (1MB) | Preview

Abstract

State-of-the-art electron microscopy has enabled us to investigate microstructural details down to sub-subångström and milli-electron-volt resolution level. The enhanced photoreactivity over bismuth hybridized BiOCl catalyst (Bi/BiOCl) has been reported recently, however, the mechanistic understandings of this improved photoreactivity especially the optical behavior of bismuth nanoparticles (Bi NPs) are still obscured and in debate. The optical absorption features of Bi NPs and the charge transfer characteristic between bismuth and BiOCl have been considered as the major physicochemical origin for the promoted photoreactivity. Based on the advanced (in-situ) electron microscopy of monochromated electron energy loss spectroscopy in scanning transmission electron microscopy imaging mode (Mono-STEM-EELS) along with related theoretical investigations, in this work, we for the first time distinguished and explained the optical absorption originated from the localized surface plasmon resonances (LSPR) effect and direct band gap transition in an individual bismuth nanoparticle as well as transportation of photogenerated carriers at the interface of Bi/BiOCl. These findings could provide better understandings about the origin of the improved photoreactivity of various bismuth-hybridized photocatalysts.

Type:	Article
Title:	Probing the light harvesting and charge rectification of bismuth nanoparticles behind the promoted photoreactivity onto Bi/BiOCl catalyst by (in-situ) electron microscopy
Open access status:	An open access version is available from UCL Discovery
DOI:	10.1016/j.apcatb.2016.08.049
Publisher version:	https://doi.org/10.1016/j.apcatb.2016.08.049
Language:	English
Additional information:	This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords:	BiOCl, Bismuth, Photocatalytic, Monochromated EELS, Electron microscopy
UCL classification:	UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
URI:	https://discovery.ucl.ac.uk/id/eprint/10058815