2D-In2S3 nanoflakes/1D-WO3 nanorods heterojunction with enhanced absorption and photoresponse for photoelectrochemical water splitting

Narinder Kaur, Nisha Kodan, Dipika Sharma, Abhishek Ghosh, Prashant Bisht, Rajendra Singh and Bodh Raj Mehta

Renewable Energy, 2025, vol. 240, issue C

Abstract: Low dimensional WO3 nanorods and their heterojunction with 2D-In2S3 nanoflakes are studied to investigate the improvement in photocurrent density owing to more absorption and charge carrier separation with type-II band alignment. The photocurrent density in the heterojunction In2S3-WO3 is 5.7 mAcm−2 which is 6 and 8 times more than pristine In2S3 nanoflakes and WO3 nanorods, respectively. The enhancement in the photocurrent density is attributed to the combined effect of increased absorption in 2D nanoflakes and the larger surface area of the 1D WO3 nanostructures. The IPCE (incident photon conversion efficiency) measured shows the highest response for the In2S3-WO3 heterojunction in the UV–visible range for wavelength 460 nm because depletion region formation causes separation of charge carriers and stability for a prolonged time with heating. The faradic efficiency of heterojunction is 95 % and 93 % for H2 and O2 renewable clean fuel, respectively so by integrating this heterojunction with other materials large-scale applications can be done.

Keywords: Hydrothermal technique; WO3 low dimensional nanostructures; In2S3-WO3 heterojunction; Photocurrent density; KPFM; And type-II band alignment (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:240:y:2025:i:c:s0960148124022973

DOI: 10.1016/j.renene.2024.122229

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