Sarkar, Dipendu and Ghosh, Srabanti and Pramanik, Jishu and Biswas, Maitrayee and Samajdar, Soumita and Bera, Tripti (2025) Direct Z-Scheme BiOCl/α-Fe2O3Heterojunction: A Pathway to Enhanced Photoelectrochemical Water Splitting. ES Chemistry and Sustainability, 3 (1551). ISSN 3065-1697

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Abstract

Inadequate solar absorption and inefficient charge separation are the primary factors that limit the conversion efficiency in photoelectrochemical water-splitting systems.In this work, a BiOCl/α-Fe2O3(BFE) heterostructure was synthesized using a direct deposition technique, varying the loading of α-Fe2O3nanoparticles on BiOCl nanosheets to optimize its photoelectrochemical (PEC) properties.The well-dispersed α-Fe2O3nanoparticles on the BiOCl surface enhance light absorption in the visible region while accelerating charge separation efficiency.The optimized BFE2 heterostructure exhibits a photocurrent density that is 2.5 times higher than pure BiOCl and 87 times greater than α-Fe2O3, demonstrating its superior photoelectrochemical performance.The charge carrier lifetime under continuous light irradiation reveals that BFE2 exhibits a higher value of approximately 3.97 seconds, indicating an enhanced availability of free charge carriers in the optimized BFE2 heterostructure.A direct Z-scheme heterojunction is proposed to form at the BiOCl/α-Fe2O3interface, effectively facilitating charge separation and enhancing charge mobility.This work offers valuable insights into developing a simple and cost-effective approach for synthesizing BiOCl/α-Fe2O3heterostructures that significantly improve the photoresponse of BiOCl photoanodes in PEC water splitting.

Item Type:	Article
Subjects:	Basic Science Engineering Materials
Divisions:	Fuel Cell and Battery
Depositing User:	Ms Upasana Sahu
Date Deposited:	01 Sep 2025 11:03
Last Modified:	01 Sep 2025 11:03
URI:	http://cgcri.csircentral.net/id/eprint/5754

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