selective detection of hg2+ ions in aqueous solutions using rhodamine-based nanofiber probe

In this study, the application of rhodamine-based probe for the detection of mercury ions was investigated. in this regards, rhodamine hydrazide (rh) was synthesized followed by adding glyoxal (rhg) to make a connection with chitosan. three different probes were synthesized to study their effect on the detection of mercury, namely, preparation of 1) rhg-chitosan/pmma (polymethyl methacrylate)/ aa (acrylic acid), 2) rhg/chitosan/pmma/aa and 3) rhg/pmma by addition of desired amount of photo initiator. afterwards, the nanofiber probes were prepared by electrospinning and crosslinking was occurred by uv curing. all three probes were tried for the selective detection of hg2+ and the results were shown that rhg-chitosan/pmma/aa was the best design to identify mercury ions, selectively. ft-ir, sem, edx, tga, fluorometric and uv-vis spectrophotometric analysis was applied for the characterization of nanofiber probes and their application. the effect of ph, initial concentration and contact time was investigated in these cases. consequently, this procedure is able to recognize hg2+ with limit of detection (lod) of 10 nm in water samples.

Selective detection of Hg2+ ions in aqueous solutions using rhodamine-based nanofiber probe

In this study, the application of rhodamine-based probe for the detection of mercury ions was investigated. In this regards, rhodamine hydrazide (RH) was synthesized followed by adding glyoxal (RHG) to make a connection with chitosan. Three different probes were synthesized to study their effect on the detection of mercury, namely, preparation of 1) RHG-Chitosan/PMMA (polymethyl methacrylate)/ AA (acrylic acid), 2) RHG/Chitosan/PMMA/AA and 3) RHG/PMMA by addition of desired amount of photo initiator. Afterwards, the nanofiber probes were prepared by electrospinning and crosslinking was occurred by UV curing. All three probes were tried for the selective detection of Hg2+ and the results were shown that RHG-Chitosan/PMMA/AA was the best design to identify mercury ions, selectively. FT-IR, SEM, EDX, TGA, fluorometric and UV-Vis spectrophotometric analysis was applied for the characterization of nanofiber probes and their application. The effect of pH, initial concentration and contact time was investigated in these cases. Consequently, this procedure is able to recognize Hg2+ with limit of detection (LOD) of 10 nM in water samples.