Ternary Ag•Eu 2 O 3 •SrCO 3 nanomaterials enhanced photocatalytic performance of CV dye and implicated in efficient nitrite sensor development

Abstract

The ternary Ag•Eu 2 O 3 •SrCO 3 nanomaterials (NMs) were developed using a facile coprecipitation process. XRD, SEM, EDS, FTIR, PL, and Raman spectroscopy were used to characterize the NMs. The XRD pattern showed an average particle size of 53.62 nm and good crystallinity. The photocatalytic activity of the Crystal Violet (CV) dye was assessed using several variables, including pH, reusability, and varying concentrations of NMs in visible light.The NMs dose of 0.06 g in basic medium had the best dye removal efficiency of 97.7%. Both Gram-positive and Gram-negative pathogenic bacteria were suppressed by the NMs. This paper reports on the fabrication of an efficient and sensitive nitrite sensor in aqueous phase using Ag•Eu 2 O 3 •SrCO 3 NMs, and a constructed glassy carbon electrode (GCE) using 5% Nafion. The fabricated nitrite sensor had a linear relationship between the oxidation peak current and nitrite concentration between the large concentration ranges of 0.15 and 50.0 µM as a linear dynamic range (LDR). The detection limit (LOD) and sensitivity were calculated as 0.61 µM (S/N=3) and 27.4261 µAµM -1 cm -2, respectively. The detection of nitrite was not affected by common interfering ions. Ag•Eu 2 O 3 •SrCO 3 /Nafion/GCE sensor was able to identify the nitrite in natural samples. The newly reconfigured Nafion/GCE that used Ag•Eu 2 O 3 •SrCO 3 NMs exhibited a high repeatability, reproducibility, selectivity, sensitivity, and long-term stability to nitrite. It introduced a new ternary nanostructure material for the efficient detection of environmental contaminants, as well as functioning as an efficient photocatalyst for the safety of environmental and ecological fields on a broad scale.