Photocatalytic, anti-bacterial performance and development of 2,4-diaminophenylhydrazine chemical sensor probe based on ternary doped Ag·SrSnO3nanorods

Abstract

In this approach, Ag·SrSnO3 nanocomposites were synthesized by a co-precipitation method and characterized by IR, XRD, SEM, EDS, CV, EIS, and TEM measurements. The nanocomposite Ag·SrSnO3 was crystallized in nanorods (NRs) with Ag on the surface, as revealed by SEM and TEM studies. Ag·SrSnO3 shows excellent photocatalysis for dye degradation and anti-bacterial activity against both Gram positive and Gram negative pathogenic bacteria. Here, to develop a selective 2,4-diaminophenylhydrazine (2,4-DAPHyd) electrochemical sensor, a thin layer of prepared Ag·SrSnO3 NRs was deposited onto a glassy carbon electrode (GCE) with Nafion as the conductive binder (5% Nafion) in ethanol. The slope obtained from the curve of a plot of current versus concentration of 2,4-DAPHyd, denoted the calibration curve, was used to calculate the sensitivity (7.5854 μA μM-1 cm-2) of the Ag·SrSnO3 NRs sensor. The linear dynamic range (LDR) of detection is 0.1 nM-0.01 mM. The lowest limit of detection (LOD; 96.13 ± 4.81 pM) of the Ag·SrSnO3 NR sensor was calculated at S/N = 3 (signal to noise ratio). Furthermore, the Ag·SrSnO3 NR sensor shows good reproducibility, long duration for performing sensing ability and a short response time and validation in real samples, which were collected and extracted from various sources. This journal is