Rational construction of a robust metal-organic framework nanozyme with dual-metal active sites for colorimetric detection of organophosphorus pesticides

Recent Progress in Metal-Organic Framework Based Fluorescent Sensors for Hazardous Materials Detection

“…In addition, they developed a smartphone app to make the visualisation more accurate and enable real-time regulation of pesticide contamination. Similarly, Luo et al introduced Mn ions into Fe-based MOF (Fe-MIL(53)) via a one-pot hydrothermal reaction strategy, resulting in a bimetallic Mn/Fe-MIL(53) MOF nanoenzyme that achieves selectivity and sensitivity for OPs detection, as shown in Figure 16 a [ 121 ]. The proposed Mn/Fe-MIL(53) MOF nanozyme can be used for a quantitative analysis of methyl parathion and chlorpyrifos in the concentration range of 10-120 nM and 5-50 nM, respectively.…”

“…UV–vis spectrum of nanoenzyme-TMB catalyzed system corresponding to different dosages of methyl parathion ( b ) and clorpyrifos ( c ). Adapted from [ 121 ].…”

Tailoring metal sites of FeCo-MOF nanozymes for significantly enhanced peroxidase-like activity

“…[23][24][25] Recently, Wang and co-workers designed and prepared Mn/Fe-MIL (53) with Mn and Fe dual metal active sites, in which the doping of Mn enables highly sensitive and selective colorimetric detection of organophosphorus pesticides. 26 Very recently, we reported mixed-valence Ni 4.8 Fe-MOF peroxidase-like nanozymes with highly sensitive and selective sensing, in which Ni II and mixed-valence Fe II /Fe III metal nodes within 1D sub-nanochannels synergistically enhanced the affinity for H 2 O 2 and catalytic activity. 27 Remarkably, coordinatively unsaturated metal sites or open metal sites in MOFs can serve as substrate adsorption sites, which can selectively enrich substrates at or near catalytic sites.…”

Rational design of a novel MOF-based ternary nanocomposite for effectively monitoring harmful organophosphates in foods and the environment

“…As such, the imperative to develop new electrochemical methods for detecting MP is huge. Numerous efforts [11][12][13] have been devoted to improving the performance of MP electrochemical sensors, particularly in recent years with the booming development of novel nanomaterials for electrode modication.…”