Sm 3+ induced-SrWO 4 phosphor: analysis of photoluminescence and photocatalytic properties with electron density distribution studies

In the present study, we designed a spherical shape like Sr 1− x Sm x WO 4 ( 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 Sm 3+ -doped SrWO 4 for visible excitation (405 nm) was examined to analyze its use as white LED. The emission spectra consist of intra 4f transition of Sm 3+ such as 4 G_5/2→ 6 H_5/2 (561 nm), 4 G_5/2→ 6 H_7/2 (601 nm), 4 G_5/2→ 6 H_9/2 (642 nm) and 4 G_5/2→ 6 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, Sm 3+ -doped SrWO 4 played excellent catalyst towards the photodegradation of Ibuprofen (IBF). The obtained results from the UV-Vis spectroscopy suggested that 3