Facile Synthesis and Photoelectrochemical Performance of a Bi2S3@rGO Nanocomposite Photoanode for Efficient Water Splitting
| Autor: | Bhagatram Meena, Gudipati Neeraja Sinha, Challapalli Subrahmanyam, Duvvuri Suryakala, Palyam Subramanyam |
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| Rok vydání: | 2021 |
| Předmět: |
Photocurrent
Materials science Nanocomposite Photoluminescence Graphene General Chemical Engineering Energy conversion efficiency Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology Bismuth law.invention Fuel Technology 020401 chemical engineering chemistry Chemical engineering law Water splitting Nanorod 0204 chemical engineering 0210 nano-technology |
| Zdroj: | Energy & Fuels. 35:6315-6321 |
| ISSN: | 1520-5029 0887-0624 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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