Magnetic covalent organic framework immobilized gold nanoparticles with high-efficiency catalytic performance for chemiluminescent detection of pesticide triazophos

The extraction of polycyclic aromatic hydrocarbons from water samples with aromatic-dithiocarbamate modified magnetic nanoparticles

“…To improve the extraction efficiency of Fe 3 O 4 NPs, numerous coatings including hemimicelles of alkyl carboxylates, SiO 2 , graphene, gold, polymer and carbon have been introduced for the modification of Fe 3 O 4 NPs (Ballesteros-Gomez & Rubio 2009;Zhang et al 2010;Mashhadizadeh & Karami 2011;Zhu et al 2012;Tarkistani et al 2021). Among them, gold has been found to be an ideal material for the modification of magnetic materials due to its easy reductive synthesis method, excellent chemical stability, and potential for further modification with Au-S bonds (Zhao et al 2005(Zhao et al , 2008Archana et al 2021;Chen et al 2021;Ma et al 2021;Mukha et al 2021).…”

Metalated covalent organic frameworks: from synthetic strategies to diverse applications

“…The colossal specific surface area of COFs makes them easy to interact with the external environment, which has been exploited to develop sensing materials. 699 Based on pore engineering of COFs, 700 the pore walls can be precisely designed to selectively interact with target analytes, thus allowing the design of various types of chemical detection systems based on the principles of colorimetry, 701,702 chemiluminescence, 336,703 photoluminescence, [704][705][706] chemoelectrical transduction, 707 chromatography, 708,709 and others to achieve highly sensitive and selective detection.…”

Lighting Up Agricultural Sustainability in the New Era through Nanozymology: An Overview of Classifications and Their Agricultural Applications

“…160 Ma et al prepared a Fe 3 O 4 @covalent organic framework (Fe 3 O 4 @ COF) to carry Au NPs (Fe 3 O 4 @COF@Au) with POD-like activity to establish a chemiluminescence sensor to detect triazophos in Chinese cabbage, cucumber, and tomato; this sensor achieved high analytical performance for triazophos with a LOD of 0.22 nM and a detection range of 0.5−300 nM (Figure 3F). 161 In addition, Pei et al developed cobalt hydroxide (Co(OH) 2 ) nanozymes with POD-like activity to establish a flow injection chemiluminescence immunoassay for monitoring enrofloxacin residues in agroproducts with a LOD as low as 0.041 pg mL −1 . 162 Cheng et al prepared Ag NPs with POD-like activity to catalyze H 2 O 2 to form massive amounts of ROS to enhance the electrochemiluminescent intensity of luminol; this sensor achieved remarkable analytical performance for kanamycin with a LOD of 0.06 ng mL −1 and a detection range of 0.5−100 ng mL −1 (Figure 3G).…”

“…(F) Schematic illustration of Fe 3 O 4 @COF@Au nanozymes for the development of a chemiluminescence sensor to detect triazophos in Chinese cabbage, cucumber, and tomato. Reproduced from ref . Copyright 2021 Elsevier B.V. (G) Schematic illustration of Ag NP nanozymes for enhancement of the electrochemiluminescent intensity of luminol to detect kanamycin in agroproducts.…”