Peroxidase-like Cu–Fe bimetal oxide mesoporous nanospheres identified for the efficient recognition of toxic o-aminophenol and bioactive glutathione

Abstract

To strengthen the enzyme-mimic catalytic activity of classical transition metal copper and iron oxide, bimetal Cu-Fe oxide mesoporous nanoparticles (Cu-Fe MNPs) were prepared in one pot under the microwave-assisted conditions....

Prudently designed Se@fMWCNT as a peroxidase mimicking nanozyme for distinctive electrochemical detection of H2O2 and glutathione

“…The peroxidase-like activity of nanozymes can be evaluated by their ability to oxidise substrates such as TMB, ABTS, and OPD, in the presence of H 2 O 2 . 62–64 Herein, the peroxidase mimicking characteristics of Se@fMWCNT were assessed primarily using UV-vis spectroscopy. 63 Precisely, to a solution containing 1 mM H 2 O 2 in 0.1 M PBS (pH = 7), 1 mg TMB and 1 mg mL −1 of the synthesized Se@fMWCNT were added (Fig.…”

“…62–64 Herein, the peroxidase mimicking characteristics of Se@fMWCNT were assessed primarily using UV-vis spectroscopy. 63 Precisely, to a solution containing 1 mM H 2 O 2 in 0.1 M PBS (pH = 7), 1 mg TMB and 1 mg mL −1 of the synthesized Se@fMWCNT were added (Fig. S5a inset, ESI†).…”

Visible-light-driven photoelectrochemical sensor based on conjugated microporous polymer-grafted graphene for o-aminophenol detection

“…The reliability of the PEC method was evaluated by adding low, medium and high concentrations of o -AP. 6,40 The constructed PEC was used to determine the o -AP in actual water samples with a recovery range of 98.67–105.40% and RSD of 0.84–3.72% among the 3 different concentration samples (Table 4 and Fig. S9†).…”

Biocompatible Folic-Acid-Strengthened Ag–Ir Quantum Dot Nanozyme for Cell and Plant Root Imaging of Cysteine/Stress and Multichannel Monitoring of Hg2+ and Dopamine

“…Nanomaterials with enzyme-mimicking catalytic activity (i.e., nanozymes) have drawn considerable attention during the past several years since the pioneering report by Yang et al A series of nanozymes with excellent enzyme-mimicking performance and accurate controllability were developed, which have been widely applied in biological imaging, − environmental monitoring, − enzyme-like catalysis, , and antineoplastic. , Among all of the nanozymes identified, noble-metal-based nanomaterials are among the most popular ones to be employed for environmental monitoring with nanomolar-level detection limits by virtue of their high catalytic activity and signal amplification. , However, single-noble-metal-based nanomaterials are often highly toxic and easily aggregated, which will result in their biological incompatibility and catalytic instability. What’s more, as far as we know, there have been few reports on absolute noble metal quantum dot nanozymes with dual colorimetric and fluorescent sensing applications − so far.…”