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Erschienen in: Journal of Nanoparticle Research 6/2021

01.06.2021 | Research paper

Direct dual CaIn2S4/Bi2WO6 semiconductor nanocomposites with efficient inter-cross-sectional charge carrier transfer for enhanced visible light photocatalysis

verfasst von: Thillai Sivakumar Natarajan, Rajesh J. Tayade

Erschienen in: Journal of Nanoparticle Research | Ausgabe 6/2021

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Abstract

A visible light-responsive redox-mediator-free calcium indium sulfide (CaIn2S4) and bismuth tungstate (Bi2WO6)–based direct dual semiconductor nanocomposites were prepared by combination of hydrothermal and wetness impregnation methods. The results substantiated the formation of CaIn2S4 marigold flowers, the flower-like structure of the Bi2WO6, and CaIn2S4/Bi2WO6 nanocomposites. UV–Vis-DRS analysis confirmed that visible light response of Bi2WO6 was considerably enhanced after combining with CaIn2S4. The inter-cross-sectional charge carrier transfer during photocatalysis using synthesized catalysts was studied by determining the band position of Bi2WO6 and CaIn2S4, and photoluminescence analysis. The adsorption of rhodamine B (RhB) dye study revealed that after coupling with CaIn2S4, the adsorption capacity of Bi2WO6 was significantly improved. For 15%-CaIn2S4/Bi2WO6, 38% of RhB dye was adsorbed, whereas it was 27% for bare Bi2WO6. The 15%-CaIn2S4/Bi2WO6 nanocomposite showed higher percentage degradation for RhB (82%) dye as compared to the other percentage loaded composites, bare Bi2WO6 (59%) and CaIn2S4 (72%). Photoluminescence results revealed that photo-generated electron–hole pair recombination rate was drastically suppressed after coupling with CaIn2S4 which may be presumed to inter-cross-sectional transfer of photo-generated charge carriers. The synergic effect of enhanced adsorption capacity and efficient separation of electron–hole pairs were accountable for the enhanced photodegradation efficiency under visible light.

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Literatur
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Zurück zum Zitat Jo WK, Natarajan TS (2016) Fabrication and efficient visible light photocatalytic properties of novel zinc indium sulfide (ZnIn2S4)-graphitic carbon nitride (g-C3N4)/bismuth vanadate (BiVO4) nanorod-based ternary nanocomposites with enhanced charge separation via Z-scheme transfer. J Colloid Interface Sci 482:58–72. https://doi.org/10.1016/j.jcis.2016.07.062CrossRef Jo WK, Natarajan TS (2016) Fabrication and efficient visible light photocatalytic properties of novel zinc indium sulfide (ZnIn2S4)-graphitic carbon nitride (g-C3N4)/bismuth vanadate (BiVO4) nanorod-based ternary nanocomposites with enhanced charge separation via Z-scheme transfer. J Colloid Interface Sci 482:58–72. https://​doi.​org/​10.​1016/​j.​jcis.​2016.​07.​062CrossRef
Zurück zum Zitat Jo WK, Lee JY, Natarajan TS (2016) Fabrication of hierarchically structured novel redox-mediator-free ZnIn2S4 marigold flower/Bi2WO6 flower-like direct Z-scheme nanocomposite photocatalysts with superior visible light photocatalytic efficiency. Phys Chem Chem Phys 18:1000–1016. https://doi.org/10.1039/C5CP06176HCrossRef Jo WK, Lee JY, Natarajan TS (2016) Fabrication of hierarchically structured novel redox-mediator-free ZnIn2S4 marigold flower/Bi2WO6 flower-like direct Z-scheme nanocomposite photocatalysts with superior visible light photocatalytic efficiency. Phys Chem Chem Phys 18:1000–1016. https://​doi.​org/​10.​1039/​C5CP06176HCrossRef
Zurück zum Zitat Natarajan TS, Bajaj HC, Tayade RJ (2015) Synthesis of homogeneous sphere-like Bi2WO6 nanostructure by silica protected calcination with high visible-light-driven photocatalytic activity under direct sunlight. Cryst Eng Comm 17:1037–1049. https://doi.org/10.1039/C4CE01839GCrossRef Natarajan TS, Bajaj HC, Tayade RJ (2015) Synthesis of homogeneous sphere-like Bi2WO6 nanostructure by silica protected calcination with high visible-light-driven photocatalytic activity under direct sunlight. Cryst Eng Comm 17:1037–1049. https://​doi.​org/​10.​1039/​C4CE01839GCrossRef
Zurück zum Zitat Tang R, Su H, Duan S, Sun Y, Li L, Zhang X, Zeng S, Sun D (2015) Enhanced visible-light-driven photocatalytic performances using Bi2WO6/MS (M = Cd, Zn) heterostructures: facile synthesis and photocatalytic mechanisms. RSC Adv 5:41949–41960. https://doi.org/10.1039/C5RA04655FCrossRef Tang R, Su H, Duan S, Sun Y, Li L, Zhang X, Zeng S, Sun D (2015) Enhanced visible-light-driven photocatalytic performances using Bi2WO6/MS (M = Cd, Zn) heterostructures: facile synthesis and photocatalytic mechanisms. RSC Adv 5:41949–41960. https://​doi.​org/​10.​1039/​C5RA04655FCrossRef
Metadaten
Titel
Direct dual CaIn2S4/Bi2WO6 semiconductor nanocomposites with efficient inter-cross-sectional charge carrier transfer for enhanced visible light photocatalysis
verfasst von
Thillai Sivakumar Natarajan
Rajesh J. Tayade
Publikationsdatum
01.06.2021
Verlag
Springer Netherlands
Erschienen in
Journal of Nanoparticle Research / Ausgabe 6/2021
Print ISSN: 1388-0764
Elektronische ISSN: 1572-896X
DOI
https://doi.org/10.1007/s11051-021-05252-y

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