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Transparent CdS@TiO2 Nanotextile Photoanode with Boosted Photoelectrocatalytic Efficiency and Stability

Abstract

In the present work, we report the exploration of transparent CdS@TiO2 nanotextile photoanode with boosted photoelectrocatalytic (PEC) efficiency and stability, by controllable coating of amorphous TiO2 ultrathin layer via atomic layer deposition (ALD) technique. The optimal CdS@TiO2 nanotextile photoanode with 3.5 nm TiO2 ultrathin layer exhibit a photocurrent density of 1.8 mA/cm2 at 0 V vs. RHE, which is 11 times higher than that of pristine CdS counterpart. The photocatalytic H2 evolution rate of CdS@TiO2 is up to 47.5 mmol/g/h, which is superior to those of ever reported works based on one-dimensional CdS-based counterparts. Moreover, the photocurrent of CdS@TiO2 nanotextile photoanodes shows only 9% decaying after 9 h, suggesting its profoundly enhanced PEC stability, in comparison to that of pristine CdS photoanodes (almost down to zero after 3 hours). It is verified that the introduced TiO2 nanoshells could limit the charge recombination, facilitate the charge separation, reduce the charge transfer resistance, and enhance the wettability of electrode, resulting in their significantly enhanced PEC performance.

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Publication details

The article was received on 01 Aug 2017, accepted on 13 Sep 2017 and first published on 13 Sep 2017


Article type: Paper
DOI: 10.1039/C7NR05658C
Citation: Nanoscale, 2017, Accepted Manuscript
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    Transparent CdS@TiO2 Nanotextile Photoanode with Boosted Photoelectrocatalytic Efficiency and Stability

    L. Liu, H. Hou, L. Wang, R. Xu, Y. Lei, S. Shen, D. Yang and W. Yang, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR05658C

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