Chitosan-stabilized Silver Nanoparticles for Colorimetric Assay of Mercury (II) Ions in aqueous system

7th AIC‐ICMR on Sciences and Engineering 2017

自然科学;工业技术

Zarlaida, Fitri^1 ; Adlim, M.^1 ; Syukri Surbakti, M.^2 ; Omar, Ahmad Fairuz^3

Chemistry Department, FKIP, Syiah Kuala University, Darussalam Banda Aceh

23111, Indonesia^1

Physics Department, FMIPA, Syiah Kuala University, Darussalam Banda Aceh

23111, Indonesia^2

School of Physical Sciences, Universiti Sains Malaysia, Minden, Penang

11800, Malaysia^3

关键词: Aqueous system;    Colorimetric assays;    Detection limits;    Human health;    Mercury ion;    Silver nanoparticles (AgNps);    Stabilizing agents;    Water samples;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/352/1/012049/pdf
DOI  :  10.1088/1757-899X/352/1/012049

来源: IOP

【 摘 要 】

Mercury is considered as dangerous pollutant. Among the many form of mercury, the most stable and soluble in water is mercury (II) ions which it cause threat to human health and surroundings. Silver nanoparticles (AgNPs) used in this method were prepared by chitosan (chi) which act as stabilizing agent. The Chi-AgNPs has good dispersity with size ranging from 2.50 to 6.00 nm as shown by transmission electron microscopy (TEM) analysis and it is stable for 3 months. Color of Chi-AgNPs fades from brownish-yellow to colorless only with Hg2+ ions, but it shows no significant changes upon addition of other metal ions such as Al3+, Ba2+, Ca2+, Cd2+, Cr3+, Co2+, Cu2+, Fe2+, K+, Mg2+, Mn2+, Na+, Ni2+, Pb2+, and Zn2+. The detection limit for Hg2+ ions by bare-eye is estimated to be ∼1μ M. This method can be used for sensing mercury(II) ions in numerous water samples.