Please use this identifier to cite or link to this item:
https://hdl.handle.net/20.500.14279/19310
Title: | Interface Engineering of MoS2-Modified Graphitic Carbon Nitride Nano-photocatalysts for an Efficient Hydrogen Evolution Reaction | Authors: | Koutsouroubi, Eirini D. Vamvasakis, Ioannis Papadas, Ioannis T. Drivas, Charalampos Choulis, Stelios A. Kennou, Styliani Armatas, Gerasimos S. |
Major Field of Science: | Natural Sciences | Field Category: | Chemical Sciences | Keywords: | Carbon nitride;MoS2;Nanostructures;Photocatalysis;Water splitting | Issue Date: | Jul-2020 | Source: | ChemPlusChem, 2020, vol. 85, no. 7, pp. 1379-1388 | Volume: | 85 | Issue: | 7 | Start page: | 1379 | End page: | 1388 | Journal: | ChemPlusChem | Abstract: | Understanding of photochemical charge transfer processes at nanoscale heterojunctions is essential in developing effective catalysts. Here, we utilize a controllable synthesis method and a combination of optical absorption, photoluminescence, and electrochemical impedance spectroscopic studies to investigate the effect of MoS2 nanosheet lateral dimension and edge length size on the photochemical behavior of MoS2-modified graphitic carbon nitride (g-C3N4) heterojunctions. These nano-heterostructures, which comprise interlayer junctions with variable area (i. e., MoS2 lateral size ranges from 18 nm to 52 nm), provide a size-tunable interfacial charge transfer through the MoS2/g-C3N4 contacts, while exposing a large fraction of surface MoS2 edge sites available for the hydrogen evolution reaction. Importantly, modification of g-C3N4 with MoS2 layers of 39±5 nm lateral size (20 wt % loading) creates interfacial contacts with relatively large number of MoS2 edge sites and efficient electronic transport phenomena, yielding a high photocatalytic H2-production activity of 1497 μmol h−1 gcat−1 and an apparent QY of 3.3 % at 410 nm light irradiation. This study thus offers a design strategy to improve light energy conversion efficiency of catalysts by engineering interfaces at the nanoscale in 2D-layered heterojunction materials. | URI: | https://hdl.handle.net/20.500.14279/19310 | ISSN: | 21926506 | DOI: | 10.1002/cplu.202000096 | Rights: | © Wiley Attribution-NonCommercial-NoDerivatives 4.0 International |
Type: | Article | Affiliation : | University of Crete Cyprus University of Technology University of Patras |
Publication Type: | Peer Reviewed |
Appears in Collections: | Άρθρα/Articles |
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