3DRGO-NiFe_2O_4/NiO nanoparticles for fast and simple detection of organophosphorus pesticides
3DRGO-NiFe_2O_4/NiO nanoparticles for fast and simple detection of organophosphorus pesticides
复制标题
3DRGO-NiFe_2O_4/NiO 纳米粒子用于快速、简单地检测有机磷农药
DOI：
10.1016/j.cclet.2019.05.031
复制
发表时间：
2020
影响因子：
9.1
通讯作者：
Ren Cuiling
中科院分区：
文献类型：
--
作者：
Wei Zhenni;Li Huiqing;Wu Jing;Dong Yalei;Zhang Hongyi;Chen Hongli;Ren Cuiling
果蔬中有机磷农药残留对人体健康构成威胁，因此探索简便、快速检测果蔬中有机磷农药残留的方法具有重要意义。本文制备了一种新型的低成本纳米复合材料--镍铁氧体/氧化镍纳米粒子共负载三维还原氧化石墨烯（3DRGO-NiFe_2 O_4/NiO NPs）。基于其高性能的模拟过氧化物酶活性，建立了一种检测有机磷农药的比色法。以敌敌畏为模型化合物，对该方法的检测性能进行了评价。敌敌畏的检测线性范围为50 ~ 2.5 × 10~4 μg/mL，检出限为10 μg/mL。基于3DRGO-NiFe_2 O_4/NiO纳米粒子可研制出用于敌敌畏视觉检测的试纸，通过智能手机可将试纸传感器的图像信息转化为数字信号进行定量检测。值得注意的是，该方法还可用于检测真实的样品中的敌敌畏，包括蔬菜和水果。因此，开发裸检测具有很大的潜力，在简单，廉价和快速检测水果和蔬菜样品中的有机磷农药。
The residues of organophosphorus pesticide (OPs) on fruits and vegetables pose a threat to human health, so it is very meaningful to explore simple and fast detect methods for OPs residual. In this work, nickel ferrite/nickel oxide nanoparticles co-loaded three-dimensional reduced graphene oxide (3DRGO-NiFe_2O_4/NiO NPs), as a new low cost nanocomposite, was prepared. Based on its high performance mimetic peroxidase activity, a colorimetric method for the detection of OPs has been developed. Dichlorvos was chosen as model compounds to evaluate the detection performance. The detection linear range for dichlorvos is from 50 µg/mL to 2.5 × 10~4 µg/mL with a detection limit of 10 µg/mL. Furthermore, a test paper can be developed based on the 3DRGO-NiFe_2O_4/NiO NPs for visual detection of dichlorvos, and the image information of the paper sensor can be converted into digital signal and quantitative detection by a smartphone. Notably, this method can also be used to detect dichlorvos in real samples, including vegetables and fruits. Thus, the developed naked assay holds great potential in simple, inexpensive and rapid detection of OPs in fruit and vegetable samples.