Synthesis and characterization of AgBiS2/rGO nanocomposites: Interfacial charge transfer process

AgBiS2-rGO hybrid nano composite has been synthesized by the facile solvothermal technique. The phase formation has been identified by structural analysis which confirmed the formation of AgBiS2-rGO hybrid composite. Raman analysis ensured the presence of AgBiS2, GO and defect state of the graphene. The morphology of composite shown as flakes composed of sphere shaped structure aggregate on the rGO sheets and also well aligned crystallinity with lattice spacing of 0.28 nm of AgBiS2. The embedded AgBiS2 flakes on rGO sheets are highly favourable for fast electron transfer because of its large surface area. The absorption spectrum gradually increased in the near-IR region with the increased content of GO. Tauc plot was used to estimate the optical band gap. The impedance analysis exposed the less charge transfer resistance with the increased GO composition. These results have confirmed the formation of AgBiS2 on rGO and interaction between them.

Automated summary

AgBiS2-rGO hybrid nano composite was synthesized using a facile solvothermal technique. Structural and Raman analysis confirmed the formation of the composite, highlighting its favorable properties for electron transfer and changes in optical characteristics. The study also revealed increased absorption in the near-IR region with higher GO content.