Abstract
In the present study, we designed a spherical shape like Sr1−xSmxWO4 (x = 0.0, 0.01, 0.02, 0.03, 0.04 and 0.05) materials by simple co-precipitation route and evaluated its photoluminescence and photocatalytic properties. The structural and morphological properties of as-prepared materials were studied by powder X-ray diffraction method, X-ray photoelectron spectroscopy, scanning electron micrographic images and transmission electron micrographic images. The photoluminescence behavior of Sm3+-doped SrWO4 for visible excitation (405 nm) was examined to analyze its use as white LED. The emission spectra consist of intra 4f transition of Sm3+ such as 4\({\text{G}}_{5/2}\to\)6\({\text{H}}_{5/2}\) (561 nm), 4\({\text{G}}_{5/2}\to\)6\({\text{H}}_{7/2}\) (601 nm), 4\({\text{G}}_{5/2}\to\)6\({\text{H}}_{9/2}\) (642 nm) and 4\({\text{G}}_{5/2}\to\)6\({\text{H}}_{11/2}\) (711 nm), respectively. Furthermore, the emission wavelength at 601 and 642 nm suggests a strong orange and red emission, which can be applied for the application for near-UV excitation. On the other hand, Sm3+-doped SrWO4 played excellent catalyst towards the photodegradation of Ibuprofen (IBF). The obtained results from the UV-Vis spectroscopy suggested that 3% of Sm3+-doped SrWO4 had high photocatalytic activity compared to other materials. The degradation efficiency of Sr0.97Sm0.03WO4 toward IBF was observed about 97% within 80 min under visible irradiation and it showed good stability by observing the reusability of catalyst. These results suggested that the Sm3+-doped SrWO4 material are suitable candidate for application in photoluminescence and photocatalysis.
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The author D.S would wish to thank the Kalasalingam Academy of Research and Education (KARE), International Research Centre (IRC) for providing the University Research Fellowship (URF) and instrumentation facilities. The authors are pleased to Dr. Arunachalam Lakshmanan, Dean (R&D), Saveetha Engineering College, Chennai for PL measurements.
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Sivaganesh, D., Saravanakumar, S., Sivakumar, V. et al. Sm3+ induced-SrWO4 phosphor: analysis of photoluminescence and photocatalytic properties with electron density distribution studies. J Mater Sci: Mater Electron 31, 8865–8883 (2020). https://doi.org/10.1007/s10854-020-03421-8
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DOI: https://doi.org/10.1007/s10854-020-03421-8