Facile Synthesis and Photoelectrochemical Performance of a Bi2S3@rGO Nanocomposite Photoanode for Efficient Water Splitting

Subramanyam, Palyam and Meena, Bhagatram and Neeraja Sinha, Gudipati and Suryakala, Duvvuri and Subrahmanyam, Challapalli (2021) Facile Synthesis and Photoelectrochemical Performance of a Bi2S3@rGO Nanocomposite Photoanode for Efficient Water Splitting. Energy & Fuels, 35 (7). pp. 6315-6321. ISSN 0887-0624

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Abstract

Visible-light-active photoelectrodes are more responsive to high-energy conversion efficiency in photoelectrochemical (PEC) water splitting. In this work, we fabricated a bismuth sulfide@reduced graphene oxide (Bi2S3@rGO) nanocomposite photoanode via facile synthetic methods. Typical results show that the Bi2S3@rGO nanocomposite exhibited a high photocurrent density of 6.06 mA cm-2 and a maximum applied bias photon-to-current efficiency (ABPE) of 4.2% at 0.32 V. Moreover, Bi2S3 nanorods have more uniform dispersion on the surface of rGO sheets in the Bi2S3@rGO composite as demonstrated in the transmission electron microscopy images. In addition, photoluminescence and impedance studies reveal the enhanced charge-transfer properties in the Bi2S3@rGO photoelectrode. The enhanced PEC performance of the composite could be attributed to the effective visible-light absorption of Bi2S3 and the good electron-transfer properties of highly conductive rGO nanosheets, facilitating the charge separation and transportation, leading to the inhibition of charge recombination.

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IITH Creators:

IITH Creators	ORCiD
Subrahmanyam, Challapalli	UNSPECIFIED

Item Type:

Article

Uncontrolled Keywords:

Charge transfer; Conversion efficiency; Electron transport properties; Graphene; High resolution transmission electron microscopy; Layered semiconductors; Light; Light absorption; Nanorods; Photocurrents; Photoelectrochemical cells; Reduced Graphene Oxide; Semiconductor quantum wells; Sulfur compounds; Charge recombinations; Charge transfer properties; High energy conversions; Photoelectrochemical performance; Photoelectrochemicals; Photon-to-current efficiencies; Transmission electron microscopy images; Visible light absorption

Subjects:

Chemistry
Chemistry > Inorganic chemistry
Chemistry > Crystallography
Chemical Engineering

Divisions:

Department of Chemistry

Depositing User:

. LibTrainee 2021

Date Deposited:

17 Jun 2021 07:22

Last Modified:

17 Jun 2021 07:22

URI:

http://raiithold.iith.ac.in/id/eprint/7928