卡拉胶功能化的 Ag/AgCl 纳米粒子高选择性和定量比色检测汞(II)离子。
Highly selective and quantitative colorimetric detection of mercury(II) ions by carrageenan-functionalized Ag/AgCl nanoparticles.
机构信息
School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeongbuk 38541, Republic of Korea; Department of Nano, Medical & Polymer Materials, College of Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeongbuk 38541, Republic of Korea.
School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeongbuk 38541, Republic of Korea; Department of Nano, Medical & Polymer Materials, College of Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeongbuk 38541, Republic of Korea.
出版信息
Carbohydr Polym. 2017 Mar 15;160:90-96. doi: 10.1016/j.carbpol.2016.12.055. Epub 2016 Dec 23.
The natural algal polysaccharide carrageenan was used for the greener synthesis of silver/silver chloride nanoparticles (Carr-Ag/AgCl NPs) without any toxic chemicals. We report the robust, highly selective, and sensitive colorimetric sensing of Hg ions using Carr-Ag/AgCl NPs without any further surface modification. The dark-brown color of a solution of Carr-Ag/AgCl NPs turned to white in a concentration-dependent manner with the addition of Hg ions, confirming the interaction of Carr-Ag/AgCl NPs with Hg ions. The plot of the extinction ratio of absorbance at 350nm to 450nm (A/A) for Carr-Ag/AgCl NPs against the concentration of [Hg] ions was linear, and the calibration curve was A/A=1.05254+0.00318×C with a lower detection limit of 1μM. This portable and cost-effective method for mercury(II) ion sensing is widely applicable in on-field qualitative and quantitative measurements of [Hg] ions in environmental or biological samples.
天然海藻多糖卡拉胶被用于在没有任何有毒化学物质的情况下，绿色合成银/氯化银纳米粒子（Carr-Ag/AgCl NPs）。我们报道了使用 Carr-Ag/AgCl NPs 无需任何进一步表面修饰即可对 Hg 离子进行稳健、高选择性和灵敏的比色传感。Carr-Ag/AgCl NPs 的深棕色溶液在加入 Hg 离子后会以浓度依赖的方式变为白色，证实了 Carr-Ag/AgCl NPs 与 Hg 离子的相互作用。Carr-Ag/AgCl NPs 的 350nm 处吸光度与 450nm 处吸光度之比（A/A）与[Hg]离子浓度的关系呈线性，校准曲线为 A/A=1.05254+0.00318×C，检测限低至 1μM。这种用于汞(II)离子传感的便携式且具有成本效益的方法广泛适用于环境或生物样品中[Hg]离子的现场定性和定量测量。
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