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Active removal of waste dye pollutants using Ta3N5/W18O49 nanocomposite fibres / Daniel R. Jones; Virginia Gomez; Joseph C. Bear; Bertrand Rome; Francesco Mazzali; James D. McGettrick; Aled R. Lewis; Serena Margadonna; Waheed A. Al-Masry; Charles W. Dunnill
Scientific Reports, Volume: 7, Issue: 1
Swansea University Author: Dunnill, Charlie
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A scalable solvothermal technique is reported for the synthesis of a photocatalytic composite material consisting of orthorhombic Ta3N5 nanoparticles and WOx≤3 nanowires. Through X-ray diffraction and X-ray photoelectron spectroscopy, the as-grown tungsten(VI) sub-oxide was identified as monoclinic...
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A scalable solvothermal technique is reported for the synthesis of a photocatalytic composite material consisting of orthorhombic Ta3N5 nanoparticles and WOx≤3 nanowires. Through X-ray diffraction and X-ray photoelectron spectroscopy, the as-grown tungsten(VI) sub-oxide was identified as monoclinic W18O49. The composite material catalysed the degradation of Rhodamine B at over double the rate of the Ta3N5 nanoparticles alone under illumination by white light, and continued to exhibit superior catalytic properties following recycling of the catalysts. Moreover, strong molecular adsorption of the dye to the W18O49 component of the composite resulted in near-complete decolourisation of the solution prior to light exposure. The radical species involved within the photocatalytic mechanisms were also explored through use of scavenger reagents. Our research demonstrates the exciting potential of this novel photocatalyst for the degradation of organic contaminants, and to the authors’ knowledge the material has not been investigated previously. In addition, the simplicity of the synthesis process indicates that the material is a viable candidate for the scale-up and removal of dye pollutants on a wider scale.
This paper published in Scientific Reports shows some truly versatile science for making Bi-phasic photocatalytic nanoparticles. We are able to combine a hydrogen catalyst with an oxygen catalyst in the same nanoparticle such that we can optimise the photocatalytic harvesting of light. in this case we are harvesting the light for the application of delivering safe drinking water however small adjustments could be made to form a water splitting photocatalyst for the production of Hydrogen. we are rated in the 98th percentile for spread and impact on nature scientific reports and have shown the method to be easily reproducible in other systems. This paper has lead to a number of invited talks at international journals.
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