Promotional effects of cetyltrimethylammonium bromide surface modification on a hematite photoanode for photoelectrochemical water splitting

Qian Li; Rajini P. Antony; Lydia Helena Wong; Dickon H.L. Ng

doi:10.1039/c5ra20529h

Promotional effects of cetyltrimethylammonium bromide surface modification on a hematite photoanode for photoelectrochemical water splitting

Qian Li, Rajini P. Antony, Lydia Helena Wong^*, Dickon H.L. Ng

^*Corresponding author for this work

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

9 Citations (Scopus)

Abstract

A hematite nanorod array was treated with cetyltrimethylammonium bromide (CTAB) surfactant by a simple hydrothermal method. The generated CTAB-Fe₂O₃ had double the photocurrent of pristine hematite at 1.23 V vs. RHE. We found that there was an increase of carrier density from the CTAB surface modification which favored the transport of the charge carriers. The negative electric field created on the surface of the hematite owing to the Br^- layer sped up the interfacial charge transfer and the oxygen evolution kinetics. Thus, there was an enhancement in the water splitting performance. The modification by CTAB on the surface of hematite was proven to be an effective approach in promoting photoelectrochemical water splitting.

Original language	English
Pages (from-to)	100142-100146
Number of pages	5
Journal	RSC Advances
Volume	5
Issue number	121
DOIs	https://doi.org/10.1039/c5ra20529h
Publication status	Published - 2015
Externally published	Yes

Bibliographical note

Publisher Copyright:
© The Royal Society of Chemistry 2015.

ASJC Scopus Subject Areas

General Chemistry
General Chemical Engineering

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Cite this

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title = "Promotional effects of cetyltrimethylammonium bromide surface modification on a hematite photoanode for photoelectrochemical water splitting",

abstract = "A hematite nanorod array was treated with cetyltrimethylammonium bromide (CTAB) surfactant by a simple hydrothermal method. The generated CTAB-Fe2O3 had double the photocurrent of pristine hematite at 1.23 V vs. RHE. We found that there was an increase of carrier density from the CTAB surface modification which favored the transport of the charge carriers. The negative electric field created on the surface of the hematite owing to the Br- layer sped up the interfacial charge transfer and the oxygen evolution kinetics. Thus, there was an enhancement in the water splitting performance. The modification by CTAB on the surface of hematite was proven to be an effective approach in promoting photoelectrochemical water splitting.",

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AU - Li, Qian

AU - Antony, Rajini P.

AU - Wong, Lydia Helena

AU - Ng, Dickon H.L.

PY - 2015

Y1 - 2015

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AB - A hematite nanorod array was treated with cetyltrimethylammonium bromide (CTAB) surfactant by a simple hydrothermal method. The generated CTAB-Fe2O3 had double the photocurrent of pristine hematite at 1.23 V vs. RHE. We found that there was an increase of carrier density from the CTAB surface modification which favored the transport of the charge carriers. The negative electric field created on the surface of the hematite owing to the Br- layer sped up the interfacial charge transfer and the oxygen evolution kinetics. Thus, there was an enhancement in the water splitting performance. The modification by CTAB on the surface of hematite was proven to be an effective approach in promoting photoelectrochemical water splitting.

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Promotional effects of cetyltrimethylammonium bromide surface modification on a hematite photoanode for photoelectrochemical water splitting

Abstract

Bibliographical note

ASJC Scopus Subject Areas

UN SDGs

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