G-C3N4 (2D)/CdS (1D)/rGO (2D) dual-interface nano-composite for excellent and stable visible light photocatalytic hydrogen generation

Surendar Tonda; Santosh Kumar; Yogesh Gawli; Monika Bhardwaj; Satishchandra Ogale

doi:10.1016/j.ijhydene.2016.11.065

G-C₃N₄ (2D)/CdS (1D)/rGO (2D) dual-interface nano-composite for excellent and stable visible light photocatalytic hydrogen generation

Surendar Tonda, Santosh Kumar, Yogesh Gawli, Monika Bhardwaj, Satishchandra Ogale^*

^*Corresponding author for this work

College of Engineering and Physical Sciences

Research output: Contribution to journal › Article › peer-review

Abstract

A 2D/1D/2D dual-interface nano-composite configuration in the form of CdS nanorods sandwiched between g-C₃N₄ and rGO sheets with intimate interfacial contact is synthesized by a facile wet-chemical method and is shown to exhibit excellent photocatalytic H₂ generation under visible-light irradiation. In particular, the optimal g-C₃N₄/CdS/rGO dual-interface nano-composite shows H₂ production rate of ∼4800 μmol h^-1 g^-1, which is almost 44, 11 and 2.5 times higher than that shown by pure g-C₃N₄ nanosheets, and the g-C₃N₄/rGO and g-C₃N₄/CdS single interface heterostructures, respectively. It is shown that the synergic effects involving the band structure match and close interfacial contact, which can accelerate the separation and transfer of photoinduced charge carriers, and the enhanced visible-light absorption together contribute to the impressive photocatalytic performance and photostability of the g-C₃N₄/CdS/rGO ternary nano-composite system. Specific advantages of a dual-interface triple-composite system over a single interface case(s) are also brought out.

Original language	English
Pages (from-to)	5971-5984
Number of pages	14
Journal	International Journal of Hydrogen Energy
Volume	42
Issue number	9
Early online date	29 Nov 2016
DOIs	https://doi.org/10.1016/j.ijhydene.2016.11.065
Publication status	Published - 2 Mar 2017

Bibliographical note

© 2016, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

Supplementary data available on the journal website.

Keywords

charge transfer
dual-interface
G-CN
H generation
heterostructure
nano-composite

Access to Document

10.1016/j.ijhydene.2016.11.065

Visible light photocatalytic hydrogen generation
© 2016, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Accepted author manuscript, 2.3 MB

Cite this

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title = "G-C3N4 (2D)/CdS (1D)/rGO (2D) dual-interface nano-composite for excellent and stable visible light photocatalytic hydrogen generation",

abstract = "A 2D/1D/2D dual-interface nano-composite configuration in the form of CdS nanorods sandwiched between g-C3N4 and rGO sheets with intimate interfacial contact is synthesized by a facile wet-chemical method and is shown to exhibit excellent photocatalytic H2 generation under visible-light irradiation. In particular, the optimal g-C3N4/CdS/rGO dual-interface nano-composite shows H2 production rate of ∼4800 μmol h-1 g-1, which is almost 44, 11 and 2.5 times higher than that shown by pure g-C3N4 nanosheets, and the g-C3N4/rGO and g-C3N4/CdS single interface heterostructures, respectively. It is shown that the synergic effects involving the band structure match and close interfacial contact, which can accelerate the separation and transfer of photoinduced charge carriers, and the enhanced visible-light absorption together contribute to the impressive photocatalytic performance and photostability of the g-C3N4/CdS/rGO ternary nano-composite system. Specific advantages of a dual-interface triple-composite system over a single interface case(s) are also brought out.",

keywords = "charge transfer, dual-interface, G-CN, H generation, heterostructure, nano-composite",

author = "Surendar Tonda and Santosh Kumar and Yogesh Gawli and Monika Bhardwaj and Satishchandra Ogale",

note = "{\textcopyright} 2016, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ Supplementary data available on the journal website.",

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AU - Tonda, Surendar

AU - Kumar, Santosh

AU - Gawli, Yogesh

AU - Bhardwaj, Monika

AU - Ogale, Satishchandra

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N2 - A 2D/1D/2D dual-interface nano-composite configuration in the form of CdS nanorods sandwiched between g-C3N4 and rGO sheets with intimate interfacial contact is synthesized by a facile wet-chemical method and is shown to exhibit excellent photocatalytic H2 generation under visible-light irradiation. In particular, the optimal g-C3N4/CdS/rGO dual-interface nano-composite shows H2 production rate of ∼4800 μmol h-1 g-1, which is almost 44, 11 and 2.5 times higher than that shown by pure g-C3N4 nanosheets, and the g-C3N4/rGO and g-C3N4/CdS single interface heterostructures, respectively. It is shown that the synergic effects involving the band structure match and close interfacial contact, which can accelerate the separation and transfer of photoinduced charge carriers, and the enhanced visible-light absorption together contribute to the impressive photocatalytic performance and photostability of the g-C3N4/CdS/rGO ternary nano-composite system. Specific advantages of a dual-interface triple-composite system over a single interface case(s) are also brought out.

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