Title : Ultra-small CuO(x)\/GDYO nanozyme with boosting peroxidase-like activity via electrochemical strategy: Toward applicable colorimetric detection of organophosphate pesticides - Zhang_2024_Talanta_279_126639 |
Author(s) : Zhang X , Xue C , Cao H , Wu Y , Yang B , Zhou T , Zhai W , Deng J |
Ref : Talanta , 279 :126639 , 2024 |
Abstract :
In this paper, an ultra-small-sized CuO(x)/GDYO nanozyme in situ grown on ITO glass was rationally synthesized from mixed precursors of graphdiyne oxide (GDYO) and copper based infinite coordination polymer (Cu-ICP, consisting of Cu ions and two organic ligands 3,5-di-tert-butylcatechol and 1,4-bis(imidazole-1-ylmethyl)benzene) via mild and simple electrochemical strategy. On one hand, the preferential electro-reduction of Cu-ICP enabled the formation of ultra-small CuO(x) with Cu(I) as the main component and avoided the loss of oxygen-containing functional groups and defects on the surface of GDYO; on the other hand, GDYO can also serve as electroless reductive species to facilitate the electrochemical deposition of CuO(x) and turn itself to a higher oxidation state with more exposed functional groups and defects. This one-stone-two-birds electrochemical strategy empowered CuO(x)/GDYO nanozyme with superior peroxidase-mimicking activity and robust anchoring stability on ITO glass, thus enabled further exploration of the portable device with availability for point-of-use applications. Based on the organophosphorus pesticides (OPs) blocked acetylcholinesterase (AChE) activity, the competitive redox reaction was regulated to initiate the chromogenic reaction of 3,3',5,5'-tetramethylbenzidine (TMB) catalyzed by CuO(x)/GDYO peroxidase-like nanozyme, which laid out a foundation for the detection of OPs (with chlorpyrifos as an example). With a detection of limit low to 0.57 nM, the OPs residues during agricultural production can be directly monitored by the portable device we developed. |
PubMedSearch : Zhang_2024_Talanta_279_126639 |
PubMedID: 39094531 |
Zhang X, Xue C, Cao H, Wu Y, Yang B, Zhou T, Zhai W, Deng J (2024)
Ultra-small CuO(x)\/GDYO nanozyme with boosting peroxidase-like activity via electrochemical strategy: Toward applicable colorimetric detection of organophosphate pesticides
Talanta
279 :126639
Zhang X, Xue C, Cao H, Wu Y, Yang B, Zhou T, Zhai W, Deng J (2024)
Talanta
279 :126639