Rational design of TiO2/BiSbS3 heterojunction for efficient solar water splitting

Meena, Bhagatram and Kumar, Mohit and Gupta, Sandeep and Subrahmanyam, Challapalli and et al, . (2022) Rational design of TiO2/BiSbS3 heterojunction for efficient solar water splitting. Sustainable Energy Technologies and Assessments, 49. pp. 1-10. ISSN 2213-1388

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Solar induced water splitting with semiconductor photoelectrodes has been recognized as a sustainable alternative for addressing the energy crisis and pollution by creating hydrogen as a clean fuel. Insufficient light absorption and quick recombination of excitons are the most major bottlenecks in the emergence of semiconductor-based photocatalysts. The major challenge to the commercialization of this technique is the development of photoelectrodes that fulfill the PEC water-splitting requirements. In this study, As a photoanode for PEC water splitting, BiSbS3 NRs were grown on TiO2 films using a simple chemical bath deposition method. Such heterojunctions were chosen to amplify and expand the absorption of visible light, charge transport, charge separation and electrical conduction. The results show that the TiO2/BiSbS3 heterojunction photoanode exhibits relatively low charge transfer resistance, a highest current density of 5.0 mA.cm−2 and STH conversion efficiency of 4.5% at 0.3 V vs RHE. The system's long-term stability was also evaluated for a period of 10,000 s and hydrogen evolution was carried out for 9000 s. Photoluminescence (PL) spectroscopy confirms that TiO2/BiSbS3 heterojunction exhibits stronger light absorption and efficient charge transfer compare to bare TiO2 and BiSbS3. Composite exhibits larger Brunauer − Emmett − Teller (BET) surface area compare to bare TiO2 and BiSbS3 which have contributed in excellent PEC performance compare to bare materials. © 2021

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IITH Creators:
IITH CreatorsORCiD
Subrahmanyam, Challapallihttps://orcid.org/0000-0002-2643-3854
Item Type: Article
Additional Information: B. R. M. and M. K. are grateful for the CSIR research fellowship India.
Uncontrolled Keywords: BiSbS3; Charge separation; Chemical bath deposition; p-n junction; PEC water splitting
Subjects: Physics > Electricity and electronics
Divisions: Department of Chemistry
Depositing User: . LibTrainee 2021
Date Deposited: 14 Jul 2022 06:55
Last Modified: 14 Jul 2022 06:55
URI: http://raiith.iith.ac.in/id/eprint/9686
Publisher URL: http://doi.org/10.1016/j.seta.2021.101775
OA policy: https://v2.sherpa.ac.uk/id/publication/28961
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