Fabrication and enhancement in photoconductive response of α -Fe2O3/graphene nanocomposites as anode material

Naveed Alam; Arif Ullah; Yaqoob Khan; Won Chun Oh; Kefayat Ullah

doi:10.1007/s10854-018-9886-2

Fabrication and enhancement in photoconductive response of α -Fe₂O₃/graphene nanocomposites as anode material

Naveed Alam, Arif Ullah, Yaqoob Khan, Won Chun Oh, Kefayat Ullah^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

We report a facile fabrication for the synthesis of graphene based α-Fe₂O₃ 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-Fe₂O₃ nanoparticles were indexed to rhombohedral structure of α-Fe₂O₃, while the TEM images illustrate the flaky structure of graphene supported by hematite nanoparticles. The rGO/α-Fe₂O₃ nanocomposites showed enhanced photocurrent of ~ 4 mA cm⁻² at (1.23 V vs. RHE) under standard illumination conditions (AM 1.5 G 100 mW cm⁻²). The enhanced photoelectrochemical performance may be attributed to synergistic effect of graphene and α-Fe₂O₃ by improving the charge transport properties. The optical properties were also observed to be influenced by the coupling of rGO and α-Fe₂O₃ composites as witnessed in the DRS spectra.

Original language	English
Pages (from-to)	17786-17794
Number of pages	9
Journal	Journal of Materials Science: Materials in Electronics
Volume	29
Issue number	20
DOIs	https://doi.org/10.1007/s10854-018-9886-2
Publication status	Published - 1 Oct 2018
Externally published	Yes

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title = "Fabrication and enhancement in photoconductive response of α -Fe2O3/graphene nanocomposites as anode material",

abstract = "We report a facile fabrication for the synthesis of graphene based α-Fe2O3 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-Fe2O3 nanoparticles were indexed to rhombohedral structure of α-Fe2O3, while the TEM images illustrate the flaky structure of graphene supported by hematite nanoparticles. The rGO/α-Fe2O3 nanocomposites showed enhanced photocurrent of ~ 4 mA cm−2 at (1.23 V vs. RHE) under standard illumination conditions (AM 1.5 G 100 mW cm−2). The enhanced photoelectrochemical performance may be attributed to synergistic effect of graphene and α-Fe2O3 by improving the charge transport properties. The optical properties were also observed to be influenced by the coupling of rGO and α-Fe2O3 composites as witnessed in the DRS spectra.",

author = "Naveed Alam and Arif Ullah and Yaqoob Khan and Oh, {Won Chun} and Kefayat Ullah",

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AU - Alam, Naveed

AU - Ullah, Arif

AU - Khan, Yaqoob

AU - Oh, Won Chun

AU - Ullah, Kefayat

PY - 2018/10/1

Y1 - 2018/10/1

N2 - We report a facile fabrication for the synthesis of graphene based α-Fe2O3 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-Fe2O3 nanoparticles were indexed to rhombohedral structure of α-Fe2O3, while the TEM images illustrate the flaky structure of graphene supported by hematite nanoparticles. The rGO/α-Fe2O3 nanocomposites showed enhanced photocurrent of ~ 4 mA cm−2 at (1.23 V vs. RHE) under standard illumination conditions (AM 1.5 G 100 mW cm−2). The enhanced photoelectrochemical performance may be attributed to synergistic effect of graphene and α-Fe2O3 by improving the charge transport properties. The optical properties were also observed to be influenced by the coupling of rGO and α-Fe2O3 composites as witnessed in the DRS spectra.

AB - We report a facile fabrication for the synthesis of graphene based α-Fe2O3 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-Fe2O3 nanoparticles were indexed to rhombohedral structure of α-Fe2O3, while the TEM images illustrate the flaky structure of graphene supported by hematite nanoparticles. The rGO/α-Fe2O3 nanocomposites showed enhanced photocurrent of ~ 4 mA cm−2 at (1.23 V vs. RHE) under standard illumination conditions (AM 1.5 G 100 mW cm−2). The enhanced photoelectrochemical performance may be attributed to synergistic effect of graphene and α-Fe2O3 by improving the charge transport properties. The optical properties were also observed to be influenced by the coupling of rGO and α-Fe2O3 composites as witnessed in the DRS spectra.

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Fabrication and enhancement in photoconductive response of α -Fe₂O₃/graphene nanocomposites as anode material

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