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Photoelectrocatalytic Hydrogen Generation Enabled by CdS Passivated ZnCuInSe Quantum Dot-Sensitized TiO2 Decorated with Ag Nanoparticles

1
College of Chemistry and Environmental Engineering, Pingdingshan University, Pingdingshan 467000, China
2
State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China
3
College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450000, China
*
Authors to whom correspondence should be addressed.
Nanomaterials 2019, 9(3), 393; https://doi.org/10.3390/nano9030393
Received: 21 January 2019 / Revised: 28 February 2019 / Accepted: 1 March 2019 / Published: 8 March 2019
(This article belongs to the Special Issue Applications of Quantum Dots)
Here we present the photoelectrocatalytic hydrogen generation properties of CdS passivated ZnCuInSe (ZCISe) quantum dots (QDs) supported by TiO2 nanowires decorated with Ag nanoparticles. In this configuration, Ag nanoparticles were sandwiched between the photo-electrons collector (TiO2) and photo-sensitizers (ZCISe), and acted as an electron relay speeding up the charge carrier transport. ZCISe and CdS enabled the optical absorption of the photoelectrode ranging from ultraviolet to near infrared region, which significantly enhanced the solar-to-chemical energy conversion efficiency. A photocurrent of 10.5 mA/cm2 and a hydrogen production rate of about 52.9 μmol/h were achieved under simulated sunlight (1.5 AG). View Full-Text
Keywords: ZCISe QDs; TiO2 nanowires; photocatalytic; hydrogen generation ZCISe QDs; TiO2 nanowires; photocatalytic; hydrogen generation
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Li, W.; Geng, H.; Yao, L.; Cao, K.; Sheng, P.; Cai, Q. Photoelectrocatalytic Hydrogen Generation Enabled by CdS Passivated ZnCuInSe Quantum Dot-Sensitized TiO2 Decorated with Ag Nanoparticles. Nanomaterials 2019, 9, 393.

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