Liu Sha, Li Yong, Yang Chao, Lu Liqiang, Nie Yulun, Tian Xike
Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, People's Republic of China.
R Soc Open Sci. 2020 Dec 16;7(12):201500. doi: 10.1098/rsos.201500. eCollection 2020 Dec.
Arsenic contamination in groundwater is a supreme environmental problem, and levels of this toxic metalloid must be strictly monitored by a portable, sensitive and selective analytical device. Herein, a new system of smartphone-integrated paper sensors with Cu nanoclusters was established for the effective detection of As(III) in groundwater. For the integration system, the fluorescence emissive peak of Cu nanoclusters at 600 nm decreased gradually with increasing As(III) addition. Meanwhile, the fluorescence colour also changed from orange to colourless, and the detection limit was determined as 2.93 nM (0.22 ppb) in a wide detection range. The interfering ions also cannot influence the detection selectivity of As(III). Furthermore, the portable paper sensors based on Cu nanoclusters were fabricated for visual detection of As(III) in groundwater. The quantitative determination of As(III) in natural groundwater has also been accomplished with the aid of a common smartphone. Our work has provided a portable and on-site detection technique toward As(III) in groundwater with high sensitivity and selectivity.
地下水中的砷污染是一个极其严重的环境问题，必须通过便携式、灵敏且具有选择性的分析设备对这种有毒类金属的含量进行严格监测。在此，我们建立了一种新型的集成智能手机的含铜纳米簇纸质传感器系统，用于有效检测地下水中的As(III)。对于该集成系统，随着As(III)添加量的增加，铜纳米簇在600 nm处的荧光发射峰逐渐降低。同时，荧光颜色也从橙色变为无色，在较宽的检测范围内，检测限确定为2.93 nM（0.22 ppb）。干扰离子也不会影响As(III)的检测选择性。此外，还制备了基于铜纳米簇的便携式纸质传感器，用于对地下水中的As(III)进行可视化检测。借助普通智能手机也完成了对天然地下水中As(III)的定量测定。我们的工作为地下水中As(III)的便携式现场检测提供了一种高灵敏度和选择性的技术。
