Design of sculptured SnS/g-C3N4 photocatalytic nanostructure for highly efficient and selective CO2 conversion to methane

Hossam A.E. Omr, Raghunath Putikam, Mahmoud Kamal Hussien, Amr Sabbah, Tsai Yu Lin, Kuei Hsien Chen, Heng Liang Wu, Shien Ping Feng, Ming Chang Lin, Hyeonseok Lee*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Here, we demonstrate the SnS/g-C3N4 crystallized and nanostructured photocatalysts for efficient and selective CO2 conversion to CH4 by engineered thermal evaporation and the decoration of g-C3N4 through a simple dipping method, overcoming the limitation of bulk SnS-based photocatalysts. The SnS/g-C3N4 nanostructured photocatalysts exhibit a superior methane production rate of 387.5 μmol∙m−2∙h−1 (= c.a. 122.33 μmol∙g−1∙h−1) with an apparent quantum yield of c.a. 9.7% at 520 nm with engineered lengths. Moreover, 100% selective production toward CH4 is also measured from the SnS/g-C3N4 photocatalysts, with > 10 h stable operation. These performances are, to the best of our knowledge, the highest production rate among reported photocatalytic films and metal sulfide/g-C3N4 composite-based photocatalysts. These highly improved performances are attributed to synergistic effects by the formation of nanostructured SnS/g-C3N4, exhibiting superior light absorption, higher crystallinity, Z-scheme charge transport via C-S bonding, physical advantages of the SnS nanostructure, and excellent physiochemical properties of the surfaces.

Original languageEnglish
Article number122231
JournalApplied Catalysis B: Environmental
Volume324
DOIs
StatePublished - 5 May 2023

Keywords

  • CO conversion
  • g-CN
  • Photocatalysts
  • Sculptured thin film
  • Tin Sulfide

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