G. Gnanamoorthy

Facile solvothermal decomposition synthesis of single phase ZnBi38O60 nanobundles for sensitive detection of 4-nitrophenol

We have developed the facile solvothermal decomposition route to fabricate a single phase zinc bismuthate (ZnBi38O60) binary composite nanostructure. Interestingly, the proposed technique provides a new pathway to synthesize similar multi compound oxide materials. The prepared ZnBi38O60 was characterized by different analytical techniques. Typical crystalline phase and chemical composition were confirmed using X-ray diffraction (XRD) and X-ray photoelectron spectra. Unique nanobundle morphology of the ZnBi38O60 was confirmed by field emission scanning electron microscopy (FE-SEM) and high resolution transmission electron microscopy (HR-TEM). A glassy carbon electrode modified using ZnBi38O60 nanobundles as the electrocatalyst was used to qualitatively and quantitatively determine 4-nitrophenol (4-NP) using cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The modified electrode exhibits better sensitivity (1.024 μA μM−1 cm−2) and limit of detection (LOD) 35 × 10−9 M. Thereby it can be concluded that ZnBi38O60 nanobundles could be another choice of electrocatalyst for 4-NP determination and can be extended to various nitro containing analytes.

Synthesis & characterization of Bi7.38Ce0.62O12.3 and its optical and electrocatalytic property

Bismuth cerium oxide was synthesized by thermal decomposition method. The material was characterized by X-ray diffraction technique, DRS UV-Vis, Raman spectral methods and FE-SEM. The electrocatalytic sensing activity of bismuth cerium oxide modified GCE toward 4-nitrophenol exhibits better activity than the bare GCE. The modified electrode shows higher anodic current response with lower potential.Bismuth cerium oxide was synthesized by thermal decomposition method. The material was characterized by X-ray diffraction technique, DRS UV-Vis, Raman spectral methods and FE-SEM. The electrocatalytic sensing activity of bismuth cerium oxide modified GCE toward 4-nitrophenol exhibits better activity than the bare GCE. The modified electrode shows higher anodic current response with lower potential.

Preparation and Optical Studies of Layered Double Hydroxides for Photo Catalytic Degradation of Organic Dyes

Over the past decades metal-oxide played in important role in electrocatalyst and photocatalyst. The Mn-Ru layered double hydroxides are prepared by facile one step hydrothermal method. The prepared sample was characterized by variety of techniques. Such as X-Ray Diffract meter was used to determine the phase purity and Crystal structure of the prepared sample. FT-IR is reveals the present of functional groups and DRS UV spectroscopy used to conclude the band gap energy of the prepared materials. The surface morphology was analyzed by using FESEM microscope. The prepared Mn-Ru are layered double hydroxides was further used to photo catalytic degradation of organic dyes.