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Bi_2WO_6 quantum dot-intercalated ultrathin montmorillonite nanostructure and its enhanced photocatalytic performance

Sun, Songmei and Wang, Wenzhong and Jiang, Dong and Zhang, Ling and Li, Xiaoman and Yali, Zheng and An, Qi (2014) Bi_2WO_6 quantum dot-intercalated ultrathin montmorillonite nanostructure and its enhanced photocatalytic performance. Nano Research, 7 (10). pp. 1497-1506. ISSN 1998-0124. http://resolver.caltech.edu/CaltechAUTHORS:20141114-082552026

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Abstract

The kinetic competition between electron-hole recombination and water oxidation is a key limitation for the development of efficient solar water splitting materials. In this study, we present a solution for solving this challenge by constructing a quantum dot-intercalated nanostructure. For the first time, we show the interlayer charge of the intercalated nanostructure can significantly inhibit the electron-hole recombination in photocatalysis. For Bi_2WO_6 quantum dots (QDs) intercalated in a montmorillonite (MMT) nanostructure as an example, the average lifetime of the photogenerated charge carriers was increased from 3.06 μs to 18.8 μs by constructing the intercalated nanostructure. The increased lifetime markedly improved the photocatalytic performance of Bi_2WO_6 both in solar water oxidation and environmental purification. This work not only provides a method to produce QD-intercalated ultrathin nanostructures but also a general route to design efficient semiconductor-based photoconversion materials for solar fuel generation and environmental purification.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1007/s12274-014-0511-2DOIArticle
http://link.springer.com/article/10.1007/s12274-014-0511-2PublisherArticle
http://link.springer.com/content/esm/art:10.1007/s12274-014-0511-2/file/MediaObjects/12274_2014_511_MOESM1_ESM.pdfPublisherSupplemental Material
http://rdcu.be/tuw0PublisherFree ReadCube access
ORCID:
AuthorORCID
An, Qi0000-0003-4838-6232
Alternate Title:Bi2WO6 quantum dot-intercalated ultrathin montmorillonite nanostructure and its enhanced photocatalytic performance
Additional Information:© 2014 Tsinghua University Press and Springer-Verlag Berlin Heidelberg. Received: 31 March 2014. Revised: 23 May 2014. Accepted: 9 June 2014. This work was financially supported by the National Basic Research Program of China (Grant Nos. 2010CB933503, 2013CB933203), the National Natural Science Foundation of China (Grant Nos. 51102262, 51272269), and the Science Foundation for Youth Scholars of the State Key Laboratory of High Performance Ceramics and Superfine Microstructures (Grant No. SKL201204).
Funders:
Funding AgencyGrant Number
National Basic Research Program of China2010CB933503
National Basic Research Program of China2013CB933203
National Natural Science Foundation of China51102262
National Natural Science Foundation of China51272269
Science Foundation for Youth Scholars of the State Key Laboratory of High Performance Ceramics and Superfine MicrostructuresSKL201204
Subject Keywords:photocatalysis, lifetime, ammonia degradation, water oxidation, montmorillonite exfoliation
Record Number:CaltechAUTHORS:20141114-082552026
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20141114-082552026
Official Citation:Sun, S., Wang, W., Jiang, D. et al. Nano Res. (2014) 7: 1497. doi:10.1007/s12274-014-0511-2
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:51741
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:14 Nov 2014 22:22
Last Modified:15 Jun 2017 23:52

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