Localized surface plasmon-enhanced photoelectrochemical water oxidation by inorganic/organic nano-heterostructure comprising NDI-based D-A-D type small molecule

[Display omitted] •Synthesis of NDI-based D-A-D type small organic molecule.•LSPR-enhanced photoelectrochemical water splitting by inorganic/organic nano-hybrid.•PIRET, hot electron injection. This research article reports the visible-light-driven photoelectrochemical water oxidation performances of...

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Bibliographic Details
Published in:Journal of colloid and interface science 2021-11, Vol.601, p.803-815
Main Authors: Sanke, Devendra Mayurdhwaj, Ghosh, Nani Gopal, Das, Sarasija, Karmakar, Himadri Shekhar, Sarkar, Ayan, Zade, Sanjio S.
Format: Article
Language:English
Subjects:
D-A-D type small molecule
Inorganic/organic nano-heterostructures for PEC
Organic semiconductor for water oxidation
Plasmon-enhanced water splitting
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Summary:[Display omitted] •Synthesis of NDI-based D-A-D type small organic molecule.•LSPR-enhanced photoelectrochemical water splitting by inorganic/organic nano-hybrid.•PIRET, hot electron injection. This research article reports the visible-light-driven photoelectrochemical water oxidation performances of the plasmonic Au-Pd nanoparticle-decorated inorganic/organic nano-heterostructures (NHs)—B-TiO2/NDIEHTh@Au-Pd. The inorganic constituent of the NHs consists of boron-doped TiO2 nanorods (NRs) grown on fluorine-doped tin oxide (FTO) coated glass substrate. The organic part (NDIEHTh) consists of an acceptor naphthalene diimide (NDI)-based donor–acceptor-donor (D-A-D) type small molecule, in which thiophene serves as the donor. Because of the benefits of the localized surface plasmon resonance (LSPR) effect, the Au-Pd binary alloy nanoparticles substantially ameliorate the visible-light-driven photoelectrochemical performances of the B-TiO2/NDIEHTh@Au-Pd NHs photoanode compared to the B-TiO2/NDIEHTh NHs photoanode. The photocurrent densities exhibited by the B-TiO2/NDIEHTh NHs, and B-TiO2/NDIEHTh@Au-Pd NHs photoanodes at 1 V vs Ag/AgCl are 0.68 mA/cm2 and 1.59 mA/cm2, respectively, manifesting 209% and 623% increments in the photocurrent density compared to that shown by B-TiO2 NRs photoanode. Besides, the B-TiO2/NDIEHTh@Au-Pd NHs photoanode offers a significantly cathodically shifted water oxidation potential, reduced charge transfer resistance, better surface injection efficiency, and most importantly, superior photostability compared to the B-TiO2/NDIEHTh NHs photoanode. The enhancement in the different photoelectrochemical performances could be attributed to the various advantages of LSPR, such as enhanced light absorbance, light concentration, hot electron injection, and plasmon-induced resonance energy transfer.
ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2021.05.158