A specific and sensitive optical chemical sensor (optode) was fabricated for the determination of mercury ions. The optode was prepared by graphene oxide-porphyrin composite. The graphene oxide-porphyrin composite was synthesized and characterized by field emission scanning electron microscopy (FE-SEM), UV-Vis and Fourier transform infrared (FT-IR) spectroscopic techniques. The various experimental parameters such as pH of aqueous solution of Hg (II) and content of the THPP as well as the grapheme oxide have been optimized. This optode exhibited a linear range of 6.0×10 -5 to 6.0×10 -9 mol.L -1 Hg (II) with a detection limit of 3.2×10 −9 mol.L −1 and a response time of ∼210 s.
A specific and sensitive optical chemical sensor (optode) was fabricated for the determination of mercury ions. The optode was prepared by graphene oxide-porphyrin composite. The graphene oxide-porphyrin composite was synthesized and characterized by field emission scanning electron microscopy (FE-SEM), UV-Vis and Fourier transform infrared (FT-IR) spectroscopic techniques. The various experimental parameters such as pH of aqueous solution of Hg (II) and content of the THPP as well as the grapheme oxide have been optimized. This optode exhibited a linear range of 6.0×10 -5 to 6.0×10 -9 mol.L -1 Hg (II) with a detection limit of 3.2×10 −9 mol.L −1 and a response time of ∼210 s.
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