Fluorescence-Enhanced Tb-MOF for Highly Sensitive and Selective Detection of Ammonia Nitrogen in Groundwater

被引:1
|
作者
Zhang, Meiou [1 ]
Yan, Bing [1 ]
Li, Yong [2 ]
Xie, Xianjun [1 ]
机构
[1] China Univ Geosci Wuhan, Sch Environm Studies, Wuhan 430074, Hubei, Peoples R China
[2] China Univ Geosci Wuhan, Fac Mat Sci & Chem, Wuhan 430074, Hubei, Peoples R China
来源
ACS ES&T WATER | 2024年 / 4卷 / 04期
关键词
MOFs; fluorescence detection; ammonianitrogen; groundwater; superior sensitivity andselectivity; METAL-ORGANIC FRAMEWORK; FLOW; ION; SENSORS; FRESH; PROBE; WATER;
D O I
10.1021/acsestwater.3c00550
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The excessive presence of ammonia and ammonium in groundwater poses potential hazards to human health and ecosystems; thus, accurate measurement of the ammonia nitrogen concentration is very important. Herein, a stable and highly luminescent decorated Tb-MOF was prepared by a hydrothermal and substitution reaction. Under the optimized detection conditions, the decorated Tb-MOF can detect ammonia nitrogen with an exceptional fluorescence enhancement in a wide detection range. The detection limit was determined to be 1.5514 x 10(-2) mu M in the lower concentration range from 0 to 0.0021 M. In addition, the as-prepared nanosensor also exhibited superior detection selectivity and anti-interference with respect to ammonia nitrogen, and the detection mechanism was investigated as the formation of an isoindole complex from dialdehyde with ammonia nitrogen to induce the energy transfer process. Furthermore, its practical ability was studied in groundwater with a decorated Tb-MOF. The detection in actual groundwater samples proves that this material can be used for practical applications. Our research provides a new method for visual, rapid, and in situ detection of ammonia nitrogen in groundwater.
引用
收藏
页码:1393 / 1402
页数:10
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