NIR red luminescent doped Ag·(Y0.95Eu0.05)2O3 nanocomposite for 3-Chlorophenol sensor probe and anti-MDR bacterial application

Abstract

Nanocomposite, Ag·(Y0.95Eu0.05)2O3 was characterized by XRD, SEM, EDS, TEM, FTIR and PL. Cubic morphology of Ag·(Y0.95Eu0.05)2O3 nanocomposite was observed with an average crystallite size of 43.78 nm. The materials showed excellent low temperature NIR red PL properties at 100 K, when excited by HeCd laser at 325 nm. The materials exhibited remarkable biological properties against MDR bacteria. The proposed sensor was assembled by depositing Ag·(Y0.95Eu0.05)2O3 nanocomposite on the flat part of a GCE to result a thin layer of nanocomposite and the sensor was applied to detect 3-CP in buffer solution in an electrochemical approach. To evaluate the sensor performances, the sensor calibration by plotting current versus concentration of 3-CP is executed, where currents data are distributed on a line from 0.1 nM to 0.01 mM defined as linear dynamic range (LDR) for 3-CP detection in buffer solution. The sensitivity of 3-CP sensor is calculated based on the slope of LDR considering the active surface area of GCE, which is equal to 23.5189 µAµM−1cm−2. The limit of detection (LOD) is calculated from the signal/noise ratio of 3, which is equal to 40.37 ± 2.02 pM. Besides this, the sensor parameters including reproducibility, response time and stability for long-time performance are evaluated in detail and found as reliable. Moreover, the real-time applicability of 3-CP sensor is tested by the electrochemical analysis of collected samples from environmental sources.