Glycol modified gadolinium oxide nanoparticles as a potential template for selective and sensitive detection of 4-nitrophenol

摘要

A highly efficient and simplistic fluorescence sensing method for detecting p-nitrophenol (PNP) using surface functionalized Gd2O3 nanoparticles was developed. The surface morphology and structural characterization of the Gd2O3 nanoparticles were analytically determined by TEM, SEM, EDX, PXRD, TGA, FTIR, UV and fluorescence studies. All the surface functionalized particles have shown an evident green emitted light under a UV lamp. The corresponding strong molecular interactions between the surface functionalized Gd2O3 nanoparticles and PNP resulted in significant quenching of the Gd2O3 nanoparticles as a function of concentration and nature of the nitro compounds with a higher selectivity and sensitivity. The obtained limit of detection ranges from 3.9 x 10(-7) M to 7.1 x 10(-7) M. The reproducibility of results was also examined for all the studied systems and it was found that the prepared samples were quite stable with a relative standard deviation of 1.1% for EG, 1.25% for DEG, 1.6% for TEG and 1.4% for TeEG respectively. The influence of the surface capping over Gd2O3 nanoparticles for PNP sensing was further investigated for real samples with relative standard deviations below 3.2%. The outcomes gave an effectual means to develop a sensor for fast detection and determination of perilous aromatic nitro compounds.