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Khan, Yaqoob
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article
Fabrication and enhancement in photoconductive response of α -Fe2O3/graphene nanocomposites as anode material
Abstract
<p>We report a facile fabrication for the synthesis of graphene based α-Fe<sub>2</sub>O<sub>3</sub> nanocomposites as anode material for photoelectrochemical water splitting. The effect of introduction of graphene as a solid-state electron material has been investigated in detail by controlling the synthesis parameters. The XRD pattern of hematite α-Fe<sub>2</sub>O<sub>3</sub> nanoparticles were indexed to rhombohedral structure of α-Fe<sub>2</sub>O<sub>3</sub>, while the TEM images illustrate the flaky structure of graphene supported by hematite nanoparticles. The rGO/α-Fe<sub>2</sub>O<sub>3</sub> nanocomposites showed enhanced photocurrent of ~ 4 mA cm<sup>−2</sup> at (1.23 V vs. RHE) under standard illumination conditions (AM 1.5 G 100 mW cm<sup>−2</sup>). The enhanced photoelectrochemical performance may be attributed to synergistic effect of graphene and α-Fe<sub>2</sub>O<sub>3</sub> by improving the charge transport properties. The optical properties were also observed to be influenced by the coupling of rGO and α-Fe<sub>2</sub>O<sub>3</sub> composites as witnessed in the DRS spectra.</p>