Multi-responsive paper chemosensors based on mesoporous silica nanospheres for quantitative sensing of heavy metals in water.

ABSTRACT: Exposure to low concentrations of heavy metal cations seriously harms living organisms, hence they are considered environmental toxins. Portable simple detection systems are required for field monitoring of multiple metal ions. In this report, paper-based chemosensors (PBCs) were prepared by adsorbing 1-(pyridin-2-yl diazenyl) naphthalen-2-ol (chromophore), which recognizes heavy metals, onto filter papers coated with mesoporous silica nano spheres (MSNs). The high density of the chromophore probe on the surface of PBCs resulted in ultra-sensitive optical detection of heavy metal ions and short response time. The concentration of metal ions was determined using digital image-based colorimetric analysis (DICA) and compared to spectrophotometry under optimal sensing conditions. The PBCs exhi

SUBMITTER: El-Sewify IM 

PROVIDER: S-EPMC9947744 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature