期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 3, 期 6, 页码 2617-2627出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta05295a
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资金
- DRDO-BU CLS, India
A potential single crystalline photocatalyst beta-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 similar to 1-3 mu m. The crystal phase and chemical composition of the beta-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 m(2) 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.
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