Magnetically separable indium doped ZnS NiFe2O4 heterostructure photocatalyst for mineralization of acid violet 7 dye

Fabrication, functionalization and performance of doped photocatalysts for dye degradation and mineralization: a review

“…As per interpretations reported in Shende et al (2019), some band attributions made are follows: 1486 cm −1 to -N=N-stretching vibration, 1168 cm −1 to S-O symmetric stretching vibration, both the 1600 cm −1 and 1563 cm −1 to aromatic C=C stretching vibration, 1227 cm −1 to C-N stretching vibration and 1043 cm −1 to C-O stretching vibration (for more details with regard to FTIR results, the online version of this article can be consulted at https ://doi.org/10.1016/j.match emphy s.2018.09.032). This figure has been reproduced from Shende et al (2019) with the permission of Elsevier (© 2018 Published by Elsevier B.V.) under licence number 4855150807776 (for both print and electronic formats) Co-doped BiOBr (0 1 0)…”

“…Moreover, the XPS analysis revealed that the La atoms had been impregnated into the strontium-titanate lattice following substitution of the Sr atoms, and N had been incorporated in the titanium dioxide lattice (1) substitutionally through the formation of Ti-N bonds and (2) interstitially. In a work completed recently, Shende et al (2019) have synthesized a novel magnetically separable visible light-active In-doped ZnS-NiFe 2 O 4 photocatalyst. Based on the findings of the characterization studies of the latter nanocomposite, Shende et al (2019) indicated that Indoped ZnS existed in the hexagonal structure, whereas the NiFe 2 O 4 was in a cubic structure, and both were in a very much dispersed state.…”

“…In a work completed recently, Shende et al (2019) have synthesized a novel magnetically separable visible light-active In-doped ZnS-NiFe 2 O 4 photocatalyst. Based on the findings of the characterization studies of the latter nanocomposite, Shende et al (2019) indicated that Indoped ZnS existed in the hexagonal structure, whereas the NiFe 2 O 4 was in a cubic structure, and both were in a very much dispersed state. Interestingly, (1) the optical property of the ZnS-NiFe 2 O 4 composite was enhanced as a result of In doping (and a significant degree of visible light absorption had been surveyed) and (2) it also had ferrimagnetic property which imparted to it the feature of being easily separated and recyclable from aqueous suspensions under the action of an external magnetic field.…”

“…Interestingly, (1) the optical property of the ZnS-NiFe 2 O 4 composite was enhanced as a result of In doping (and a significant degree of visible light absorption had been surveyed) and (2) it also had ferrimagnetic property which imparted to it the feature of being easily separated and recyclable from aqueous suspensions under the action of an external magnetic field. Some additional merits of the novel nanocomposite as reported by Shende et al (2019) are: photodegradation kinetics of acid violet 7 was better in comparison with that observed with In-doped ZnS, ZnS-NiFe 2 O 4 and NiFe 2 O 4 ; based on the total organic carbon analysis, a complete mineralization of the acid violet 7 had occurred within 60 min under visible light illumination (Fig. 2); electrochemical analysis data suggested enhanced charge-storage capacitance property, enhanced charge carrier transport and improved aqueous phase stability vis-à-vis those of ZnS and NiFe 2 O 4 , and significant separation of electron-hole pair over In-doped ZnS.…”

“…2 Data in image (a) report the percentage total organic carbon (TOC) changes which occur during the photocatalytic degradation process of acid violet by the nanocomposite 5In70ZnS-NiFe 2 O 4 wherein the total organic carbon content decreases with irradiation time and drops to quasi-nil after 60 min, hence suggesting total mineralization of acid violet 7 (Shende et al 2019); the FTIR spectra in image (b) are for fresh 5In70ZnS-NiFe 2 O 4 (line a in blue), for 5In70ZnS-NiFe 2 O 4 (line b in red) after stirring with acid violet at a concentration of 400 mg L −1 for 30 min in dark conditions and for 5In70ZnS-NiFe 2 O 4 (line c in black) after the photocatalytic degradation of the dye (Shende et al 2019). As per interpretations reported in Shende et al (2019), some band attributions made are follows: 1486 cm −1 to -N=N-stretching vibration, 1168 cm −1 to S-O symmetric stretching vibration, both the 1600 cm −1 and 1563 cm −1 to aromatic C=C stretching vibration, 1227 cm −1 to C-N stretching vibration and 1043 cm −1 to C-O stretching vibration (for more details with regard to FTIR results, the online version of this article can be consulted at https ://doi.org/10.1016/j.match emphy s.2018.09.032). This figure has been reproduced from Shende et al (2019) with the permission of Elsevier (© 2018 Published by Elsevier B.V.) under licence number 4855150807776 (for both print and electronic formats) Co-doped BiOBr (0 1 0)…”