NDLI: Photocatalytic degradation of organic pollutants by shape selective synthesis of β-Ga<sub>2</sub>O<sub>3</sub> microspheres constituted by nanospheres for environmental remediation

Content Provider	Royal Society of Chemistry (RSC)
Author	Thirumalairajan, S. Girija, K. Mastelaro, Valmor R. Mangalaraj, D.
Copyright Year	2015
Abstract	A potential single crystalline photocatalyst β-Ga2O3 with unique spherical morphology has been synthesized using a surfactant assisted hydrothermal process. Organic additive triblock co-polymer pluronic F127 was used as a soft template. The morphology of the material was investigated using scanning electron microscopy and it was confirmed that the nanospheres self-assembled to form microspheres with diameters in the range ∼1–3 μm. The crystal phase and chemical composition of the β-Ga2O3 microspheres were revealed by X-ray diffraction and X-ray photoelectron spectroscopy. Structural characterization exhibits the monoclinic phase of the microspheres with preferential growth along the [111] direction. A plausible mechanism has been proposed to understand the formation of microspheres. The optical absorbance spectrum showed an intense absorption feature in the UV spectral region with a bandgap energy of 4.6 eV. The Brunauer–Emmett–Teller specific surface area was found to be 82 m2 g−1. The photocatalytic activity of the material has been investigated for the degradation of model organic pollutants Rhodamine B and methylene blue under ultraviolet light irradiation. The photocatalytic mechanism towards the degradation of organic dyes has also been proposed.
Starting Page	2617
Ending Page	2627
Page Count	11
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	3
Issue Number	6
Journal	Journal of Materials Chemistry A
DOI	10.1039/c4ta05295a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Emmett Photocatalysis Surfactant Hydrothermal synthesis Scanning electron microscope Micrometre X-ray crystallography X-ray photoelectron spectroscopy Photoemission spectroscopy Monoclinic crystal system Miller index Band gap Electronvolt Specific surface area Rhodamine B Methylene blue Ultraviolet
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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