Plasmonic Bi metal and rGO decorated on BiVO4 as an efficient photoanode for photoelectrochemical water splitting

Khan, Tanmoy and Subrahmanyam, Ch (2019) Plasmonic Bi metal and rGO decorated on BiVO4 as an efficient photoanode for photoelectrochemical water splitting. Masters thesis, Indian institute of technology Hyderabad.

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Abstract

We report plasmonic Bi-metal and rGO decorated on BiVO4 using a simple single step synthesis technique followed by drop casting. Impressive five fold increment in activity is observed on BiVO4@Bi-rGO composite compared to pristine BiVO4 under visible light irradiation. This enhancement in photoelectrochemical performance on the introduction of SPR effect of Bi NPs and high electrical conductivity of rGO is ascribed to inhibited charge recombination and enhanced charge injection. The composite BiVO4@Bi-rGO exhibit a high photocurrent density of 4.21 mA cm-2 than BiVO4@ Bi electrode whose photocurrent density is 1.91 mA cm-2 at 1.23 V vs RHE. This indicates the synergistic effect of Bi-NPs and rGO in the composite. Further, superior solar to hydrogen efficiency, appreciable IPCE and low charge transfer resistance are achieved for this composite. Details on this improved PEC activity of BiVO4@Bi-rGO are marked in this work which can be adapted to make more efficient photoanodes.

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IITH Creators:
IITH CreatorsORCiD
Subrahmanyam, ChUNSPECIFIED
Item Type: Thesis (Masters)
Uncontrolled Keywords: BiVo4, rGO, Photocurrent, PEC, SPR
Subjects: Chemistry
Divisions: Department of Chemistry
Depositing User: Team Library
Date Deposited: 13 May 2019 05:24
Last Modified: 13 May 2019 05:24
URI: http://raiith.iith.ac.in/id/eprint/5125
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