Collaborative enhancement in charge separation and photon harvesting of 2D/2D heterojunction photocatalysts by horizontal loading of SnS2 nanosheets on g-CN films

Sabah Baqi; Bei Deng; May Thawda Oo

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Collaborative enhancement in charge separation and photon harvesting of 2D/2D heterojunction photocatalysts by horizontal loading of SnS2 nanosheets on g-CN films

机译：Collaborative enhancement in charge separation and photon harvesting of 2D/2D heterojunction photocatalysts by horizontal loading of SnS2 nanosheets on g-CN films

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Highly efficient photocatalysts based on van der Waals 2D type heterojunctions were fabricated by horizontal loading of ultrathin hexagonal SnS2 nanosheets on the surface of a g-CN film via spin coating followed by annealing treatment.As evidenced by micrographs and further confirmed by the first-principles calculations,a large contact area was realized in the heterojunction interface by synthesizing sheet-like structures consisting of these two semiconductors,facilitating considerably enhanced charge separation under visible light illumination.In particular,the g-CN/SnS2 heterojunction annealed at 400 ℃ favors the bonding of Sn-N and C-S resulting in reduction of the bandgap by lowering the conduction band edge and in turn yields ideal electronic structures for photoelectrochemical hydrogen production.Such a heterojunction exhibits significantly improved photoinduced current density in sharp contrast to its isolated parent parts,namely g-CN and SnS2,by a factor of 5 and 4,respectively.The photocurrent response,together with Mott-Schottky plots and photoluminescence spectroscopy,demonstrates the photo synergetic effect of the g-CN/SnS2 heterojunction which strongly boosts the photoinduced interfacial charge transfer,enhancing the charge separation during the reaction and lowering the recombination rate.

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来源
《Catalysis science & technology》 |2022年第16期|5067-5076|共10页
作者
Sabah Baqi; Bei Deng; May Thawda Oo;
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作者单位

Department of Physics,City University of Hong Kong,Hong Kong,SAR,China;

Shenzhen JL Computational Science and Applied Research Institute,Shenzhen 518109,China;

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正文语种英语
中图分类物理化学（理论化学）、化学物理学;
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Collaborative enhancement in charge separation and photon harvesting of 2D/2D heterojunction photocatalysts by horizontal loading of SnS2 nanosheets on g-CN films

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