AuNPs@PMo₁₂nanozyme: highly oxidase mimetic activity for sensitive and specific colorimetric detection of acetaminophen

Abstract

The design of a highly specific and sensitive approach for the quantitative and qualitative determination of acetaminophen (AP) is crucial from a human health point of view.

Sonochemical synthesis of graphene oxide-Ag2O nanozyme as an oxidize-like mimic for the highly sensitive detection of lithium in blood serum

“…In addition, different TMB derivatives can be generated in the reaction medium, such as charge-transfer complexes and di-imines (di-cations because of double electron transfer). A blue charge-transfer complex with absorption peaks at 652 and 370 nm and a yellow di-imine derivative (460 nm) is formed by two-electron oxidation [17] , [105] .…”

“…(1) Ag (I) ions present in the nanozyme solution (according to ICP analysis, 1 mM) cause TMB oxidation. This can be detected by absorption spectra (typical oxTMB peaks at 370 and 655 nm) and visually by blue color [17] . Hence, unreacted Ag + ions in the GO-Ag 2 O colloidal solution may play a role in oxidizing TMB to oxTMB and producing Ag (0) [108] .…”

“…The use of nanomaterials as enzymes (i.e. nanozymes) has many advantages over natural enzymes [17] . Nanozymes (NZs) are inorganic nanomaterials capable of performing biological enzyme-like functions, including peroxidases, catalases, oxidases, phosphatases, and others [18] , [19] , [20] .…”

Zeolitic Imidazolate Framework-8 Composite-Based Enzyme-Linked Aptamer Assay for the Sensitive Detection of Deoxynivalenol

“…The above results indicated that the HRP&Au@ZIF-8/cDNA composites could maintain the catalytic activity of HRP. The enzymatic kinetic properties of the HRP&Au@ZIF-8/cDNA composites were analyzed according to the Michaelis-Menten model [36]. The apparent Michaelis-Menten constant (K m ) and the maximum reaction velocity (V max ) were determined to be 1.36 mM and 8.39 × 10 -2 mM/s, respectively, from the Lineweaver-Burk plot (Figure S5).…”

Increasing the peroxidase-like activity of the MIL-100(Fe) nanozyme by encapsulating Keggin-type 12-phosphomolybdate and covering three-dimensional graphene

“…(1) PMo 12 , a classical Keggin-type POM, has proven to be a good kind of enzymemimicking reagent. 26,27 (2) The diameter of PMo 12 is ca. 11 Å, being suitable for encapsulation into the inherent cavities of MIL-100(Fe).…”