Colorimetric detection toward halide ions by a silver nanocluster hydrogel.,Talanta

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Colorimetric detection toward halide ions by a silver nanocluster hydrogel.
Talanta ( IF 5.6 ) Pub Date : 2020-01-07 , DOI: 10.1016/j.talanta.2020.120717
Yun Ma ₁ , Xiao-Fang Shen ₁ , Fei Liu ₁ , Yue-Hong Pang ₁

Affiliation

We reported a novel colorimetric method for highly selective halide ions (Cl-, Br-and I-) recognition by Ag nanoclusters hydrogel (Ag-NCs hydrogel). The Ag-NCs hydrogel could discriminate Cl-, Br-and I- ions from a wide range of environmentally important anions, identified by the distinct UV-vis absorption band changes or the change in the color of Ag-NCs hydrogel. On the basis of this strategy, 20 μM and 200 μM of Cl-, 5 μM and 100 μM of Br-, 5 μM and 100 μM of I- could be recognized within 5 min by UV-vis spectrum and naked eye observation, respectively. The surface color of hydrogel changed from yellow to dark green for Cl-, to brown for Br-, and to deep brown for I-. In addition, this sensing method had been applied successfully to detect chloride anion in real water samples such as tap water, pond water and pure water. Therefore, this rapid, facile, and cost-effective colorimetric assay based on Ag-NCs hydrogel was attractive and promising.

中文翻译：

用银纳米簇水凝胶比色检测卤素离子。

我们报道了一种新的比色法，用于通过银纳米团簇水凝胶（Ag-NCs水凝胶）识别高度选择性的卤离子（Cl-，Br-和I-）。Ag-NCs水凝胶可以区分各种对环境重要的阴离子中的Cl-，Br-和I-离子，这可以通过明显的UV-vis吸收带变化或Ag-NCs水凝胶的颜色变化来识别。在此策略的基础上，通过紫外可见光谱和肉眼观察，分别可以在5分钟内识别出20μM和200μM的Cl-，5μM和100μM的Br-，5μM和100μM的I-。。水凝胶的表面颜色从黄色变为深绿色（对于Cl-），棕色（对于Br-）和深棕色（对于I-）。此外，该传感方法已成功应用于检测自来水，池塘水和纯水等真实水样中的氯离子。因此，这很快

更新日期：2020-01-07

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