Enhance photoelectrochemical hydrogen-generation activity and stability of TiO2 nanorod arrays sensitized by PbS and CdS quantum dots under UV-visible light

We develop a composite photoanode by sensitizing TiO2 nanorod arrays with PbS quantum dots (QDs) and CdS QDs. Benefitted from additional introduced PbS QDs and CdS QDs onto TiO2, the absorption of the composite photoanodes are broaden from UV to visible region. The experimental results showed that t...

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Main Authors:	Li, Lei, Dai, Haitao, Feng, Liefeng, Luo, Dan, Wang, Shuguo, Sun, Xiaowei
Format:	Online
Language:	English
Published:	Springer US 2015
Online Access:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4620110/

id	pubmed-4620110
recordtype	oai_dc
spelling	pubmed-46201102015-10-30 Enhance photoelectrochemical hydrogen-generation activity and stability of TiO2 nanorod arrays sensitized by PbS and CdS quantum dots under UV-visible light Li, Lei Dai, Haitao Feng, Liefeng Luo, Dan Wang, Shuguo Sun, Xiaowei Nano Express We develop a composite photoanode by sensitizing TiO2 nanorod arrays with PbS quantum dots (QDs) and CdS QDs. Benefitted from additional introduced PbS QDs and CdS QDs onto TiO2, the absorption of the composite photoanodes are broaden from UV to visible region. The experimental results showed that the PbS sandwiched between TiO2 and CdS cannot only broad the absorption properties but also improve the stability. The stability can be explained by the hole facile transmission from PbS to CdS because of the valence band offsets between PbS and CdS which cause a small energy barrier and reduce the hole accumulation. The photocurrent density reached 1.35 mA cm−2 at 0.9716 V vs. RHE (0 V vs. Ag/AgCl, under 60 mW cm−2 illumination) for TiO2/PbS/CdS. The highest photocurrent of TiO2/PbS/CdS can be explained by the smallest of total resistance (138 Ω cm−2) compared to TiO2/CdS and pristine TiO2. Springer US 2015-10-26 /pmc/articles/PMC4620110/ /pubmed/26497733 http://dx.doi.org/10.1186/s11671-015-1129-3 Text en © Li et al. 2015 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
repository_type	Open Access Journal
institution_category	Foreign Institution
institution	US National Center for Biotechnology Information
building	NCBI PubMed
collection	Online Access
language	English
format	Online
author	Li, Lei Dai, Haitao Feng, Liefeng Luo, Dan Wang, Shuguo Sun, Xiaowei
spellingShingle	Li, Lei Dai, Haitao Feng, Liefeng Luo, Dan Wang, Shuguo Sun, Xiaowei Enhance photoelectrochemical hydrogen-generation activity and stability of TiO2 nanorod arrays sensitized by PbS and CdS quantum dots under UV-visible light
author_facet	Li, Lei Dai, Haitao Feng, Liefeng Luo, Dan Wang, Shuguo Sun, Xiaowei
author_sort	Li, Lei
title	Enhance photoelectrochemical hydrogen-generation activity and stability of TiO2 nanorod arrays sensitized by PbS and CdS quantum dots under UV-visible light
title_short	Enhance photoelectrochemical hydrogen-generation activity and stability of TiO2 nanorod arrays sensitized by PbS and CdS quantum dots under UV-visible light
title_full	Enhance photoelectrochemical hydrogen-generation activity and stability of TiO2 nanorod arrays sensitized by PbS and CdS quantum dots under UV-visible light
title_fullStr	Enhance photoelectrochemical hydrogen-generation activity and stability of TiO2 nanorod arrays sensitized by PbS and CdS quantum dots under UV-visible light
title_full_unstemmed	Enhance photoelectrochemical hydrogen-generation activity and stability of TiO2 nanorod arrays sensitized by PbS and CdS quantum dots under UV-visible light
title_sort	enhance photoelectrochemical hydrogen-generation activity and stability of tio2 nanorod arrays sensitized by pbs and cds quantum dots under uv-visible light
description	We develop a composite photoanode by sensitizing TiO2 nanorod arrays with PbS quantum dots (QDs) and CdS QDs. Benefitted from additional introduced PbS QDs and CdS QDs onto TiO2, the absorption of the composite photoanodes are broaden from UV to visible region. The experimental results showed that the PbS sandwiched between TiO2 and CdS cannot only broad the absorption properties but also improve the stability. The stability can be explained by the hole facile transmission from PbS to CdS because of the valence band offsets between PbS and CdS which cause a small energy barrier and reduce the hole accumulation. The photocurrent density reached 1.35 mA cm−2 at 0.9716 V vs. RHE (0 V vs. Ag/AgCl, under 60 mW cm−2 illumination) for TiO2/PbS/CdS. The highest photocurrent of TiO2/PbS/CdS can be explained by the smallest of total resistance (138 Ω cm−2) compared to TiO2/CdS and pristine TiO2.
publisher	Springer US
publishDate	2015
url	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4620110/
_version_	1613492902144507904

Enhance photoelectrochemical hydrogen-generation activity and stability of TiO2 nanorod arrays sensitized by PbS and CdS quantum dots under UV-visible light

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