No abstract

Photocatalysis is one of the fascinating elds for the wastewater treatment. In this regard, the present study deals with an effective visible light active BiYO 3 /g-C 3 N 4 heterojunction nanocomposite photocatalyst with various ratio of BiYO 3 and g-C 3 N 4 (1:3, 1:1 and 3:1), synthesised by wet chemical approach. The as-synthesised nanocomposite photocatalysts were investigated via different physicochemical approaches like Fourier transform infrared (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), transmission electrons microscopy (TEM), UV-vis diffuse re ectance spectroscopy (DRS), photoluminescence (PL) and photoelectrochemical studies to characterise the crystal structure, morphology, optical absorption characteristics and photoelectrochemical properties. The photocatalytic degradation ability of the prepared photocatalytic samples were also analysed through the degradation of RhB in the presence of visible light irradiation. Of all the synthesised photocatalysts, the optimised CB-1 composite showed a signi cant photocatalytic e ciency (88.7%), with excellent stability and recyclability after three cycles. O 2 . − and • OH radicals were found to act a major role in the RhB degradation using optimised CB-1 composite and it possessed ~ 1 times greater photocurrent intensity than the pristine g-C 3 N 4 and BiYO 3 . In the present work, a direct Zscheme heterojunction BiYO 3 /g-C 3 N 4 with a considerably improved photocatalytic performance is reported.

Photocatalysis is one of the fascinating fields for the wastewater treatment. In this regard, the present study deals with an effective visible light active BiYO3/g-C3N4 heterojunction nanocomposite photocatalyst with various ratio of BiYO3 and g-C3N4 (1:3, 1:1 and 3:1), synthesised by wet chemical approach. The as-synthesised nanocomposite photocatalysts were investigated via different physicochemical approaches like Fourier transform infrared (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), transmission electrons microscopy (TEM), UV-vis diffuse reflectance spectroscopy (DRS), photoluminescence (PL) and photoelectrochemical studies to characterise the crystal structure, morphology, optical absorption characteristics and photoelectrochemical properties. The photocatalytic degradation ability of the prepared photocatalytic samples were also analysed through the degradation of RhB in the presence of visible light irradiation. Of all the synthesised photocatalysts, the optimised CB-1 composite showed a significant photocatalytic efficiency (88.7%), with excellent stability and recyclability after three cycles. O2.− and •OH radicals were found to act a major role in the RhB degradation using optimised CB-1 composite and it possessed ~ 1 times greater photocurrent intensity than the pristine g-C3N4 and BiYO3. In the present work, a direct Z-scheme heterojunction BiYO3/g-C3N4 with a considerably improved photocatalytic performance is reported.

Constructing S-scheme heterojunction between two semiconductor materials is an effective route to increase the photocatalytic degradation efficiency. Here, a novel S-scheme WS2/BiYWO6 heterojunction photocatalyst was prepared by wet chemical route. At the same time, the photocatalytic degradation performance of the fabricated materials was analyzed by the degradation of Rhodamine B under visible light. Of all prepared WS2/BiYWO6 composites, the 20 wt. % WS2 loaded WS2/BiYWO6 composite exhibited an enhanced photocatalytic degradation ability than other prepared photocatalysts. Here, O2.− and .OH radicals are performing a pivotal role in the Rhodamine B degradation and the optimized composite shows 1.06- and 1.119-times greater photocurrent intensity than pure BiYWO6 and WS2 respectively. Also, the synthesized photocatalyst maintains its stability with negligible changes even after three cycles. Thereby, the constructed S-scheme WS2/BiYWO6 heterojunction is a potential material for the wastewater remediation.