检出限
杀虫剂
线性范围
多菌灵
环境污染
化学
材料科学
环境化学
纳米技术
色谱法
环境科学
农学
植物
杀菌剂
生物
环境保护
作者
Wenwen Jia,Rongwei Fan,Jian Zhang,Konglin Zhu,Shuang Gai,Yuanyuan Yin,Ruiqing Fan
出处
期刊:Small
[Wiley]
日期:2022-04-07
卷期号:18 (19)
被引量:31
标识
DOI:10.1002/smll.202201510
摘要
The immoderate use of pesticides in the modern agricultural industry has led to the pollution of water resources and ultimately threatens the human body. Herein, two metal-organic frameworks (MOFs), namely {[Zn(tpt)2 ·2H2 O]}n (Zn1) and {[Zn2 (tpt)2 (bdc)]}n (Zn2), (Htpt = 5-[4(1H-1,2,4-triazol-1-yl)]phenyl-2H-tetrazole), respectively, are constructed as smart materials for visual and on-site detection of pesticides and their removal from water. The exposed nitrogen-rich sites and high chemical stability make Zn2 a self-assembly core to further fabricate MOF-on-MOF-sodium alginate (ZIF-8-on-Zn2@SA) composite by wrapping ZIF-8 on the outside surface. Inheriting the excellent fluorescent emission of Zn2, the rod-like ZIF-8-on-Zn2@SA module exhibits naked-eye detection of thiophanate-methyl (TM) in real fruits and vegetables with a broad linear range (10-100 × 10-6 m), a low limit of detection (LOD = 0.14 × 10-6 m), and satisfactory recoveries (98.30-102.70%). In addition, carbendazim (CBZ), the metabolite of TM after usage in crops, can be efficiently removed from water by the ZIF-8-on-Zn2@SA (qmax = 161.8 mg g-1 ) with a high correlation coefficient (R2 > 0.99). Therefore, the portable ZIF-8-on-Zn2@SA sensing platform presents a promising candidate for monitoring and removal of pesticides, especially suitable for regions with serious pesticide environmental pollution.
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