Evidence of high rate visible light photochemical decolourisation of Rhodamine B with BiFeO 3 nanoparticles associated with BiFeO 3 photocorrosion

Chang Hengky; Xavier Moya; Neil D. Mathur; Steve Dunn

doi:10.1039/c2ra22211f

Evidence of high rate visible light photochemical decolourisation of Rhodamine B with BiFeO ₃ nanoparticles associated with BiFeO ₃ photocorrosion

Chang Hengky, Xavier Moya, Neil D. Mathur, Steve Dunn

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

52 Citations (Scopus)

Abstract

BiFeO ₃ nanopowders with a size distribution around 20 nm and optical absorption onset at 2.1 eV have been synthesized using self-combustion. These particles were used to photodecolourise Rhodamine B (RhB) dye under a solar simulator with AM1.5 irradiation. XRD analysis after illumination showed no change while XPS analysis on the particles showed significant changes to the chemical state of the Fe cations in BiFeO ₃ after irradiation. After 10 min of visible (AM 1.5) illumination, at pH 2, RhB showed >95% decolourisation, a rate of decolourisation that rivals other semiconductor systems. We conclude that BiFeO ₃ nanopowder is a highly active visible light reagent that rivals many of the doped titania systems in terms of activity, but it is not photostable due to photocorrosion of the material during illumination.

Original language	English
Pages (from-to)	11843-11849
Number of pages	7
Journal	RSC Advances
Volume	2
Issue number	31
DOIs	https://doi.org/10.1039/c2ra22211f
Publication status	Published - 7 Dec 2012
Externally published	Yes

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10.1039/c2ra22211f

Cite this

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title = "Evidence of high rate visible light photochemical decolourisation of Rhodamine B with BiFeO 3 nanoparticles associated with BiFeO 3 photocorrosion",

abstract = "BiFeO 3 nanopowders with a size distribution around 20 nm and optical absorption onset at 2.1 eV have been synthesized using self-combustion. These particles were used to photodecolourise Rhodamine B (RhB) dye under a solar simulator with AM1.5 irradiation. XRD analysis after illumination showed no change while XPS analysis on the particles showed significant changes to the chemical state of the Fe cations in BiFeO 3 after irradiation. After 10 min of visible (AM 1.5) illumination, at pH 2, RhB showed >95\% decolourisation, a rate of decolourisation that rivals other semiconductor systems. We conclude that BiFeO 3 nanopowder is a highly active visible light reagent that rivals many of the doped titania systems in terms of activity, but it is not photostable due to photocorrosion of the material during illumination.",

author = "Chang Hengky and Xavier Moya and Mathur, \{Neil D.\} and Steve Dunn",

year = "2012",

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TY - JOUR

T1 - Evidence of high rate visible light photochemical decolourisation of Rhodamine B with BiFeO 3 nanoparticles associated with BiFeO 3 photocorrosion

AU - Hengky, Chang

AU - Moya, Xavier

AU - Mathur, Neil D.

AU - Dunn, Steve

PY - 2012/12/7

Y1 - 2012/12/7

N2 - BiFeO 3 nanopowders with a size distribution around 20 nm and optical absorption onset at 2.1 eV have been synthesized using self-combustion. These particles were used to photodecolourise Rhodamine B (RhB) dye under a solar simulator with AM1.5 irradiation. XRD analysis after illumination showed no change while XPS analysis on the particles showed significant changes to the chemical state of the Fe cations in BiFeO 3 after irradiation. After 10 min of visible (AM 1.5) illumination, at pH 2, RhB showed >95% decolourisation, a rate of decolourisation that rivals other semiconductor systems. We conclude that BiFeO 3 nanopowder is a highly active visible light reagent that rivals many of the doped titania systems in terms of activity, but it is not photostable due to photocorrosion of the material during illumination.

AB - BiFeO 3 nanopowders with a size distribution around 20 nm and optical absorption onset at 2.1 eV have been synthesized using self-combustion. These particles were used to photodecolourise Rhodamine B (RhB) dye under a solar simulator with AM1.5 irradiation. XRD analysis after illumination showed no change while XPS analysis on the particles showed significant changes to the chemical state of the Fe cations in BiFeO 3 after irradiation. After 10 min of visible (AM 1.5) illumination, at pH 2, RhB showed >95% decolourisation, a rate of decolourisation that rivals other semiconductor systems. We conclude that BiFeO 3 nanopowder is a highly active visible light reagent that rivals many of the doped titania systems in terms of activity, but it is not photostable due to photocorrosion of the material during illumination.

U2 - 10.1039/c2ra22211f

DO - 10.1039/c2ra22211f

M3 - Article

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