Assembly of polyoxometalates/polydopamine nanozymes as a multifunctional platform for glutathione and Escherichia coli O157:H7 detection

Colorimetric sensing of glucose and GSH using core–shell Cu/Au nanoparticles with peroxidase mimicking activity

“…In addition, nano-enzyme is a promising material for the detection of GSH. 52 Compared with other materials for the detection of GSH, the performance of our colorimetric method is equivalent to that of other methods. Moreover, the synthesis method of Cu/Au NPs is simple, which is expected to be an ideal material for the detection of GSH.…”

Oxygen-powered flower-like FeMo6@CeO2 self-cascade nanozymes: a turn-on enhancement fluorescence sensor

“…S1c (ESI †) show the FT-IR spectra of FeMo 6 , FC-66, and FMC-n. All samples show characteristic peaks at 650, 710, and 890 cm À1 attributed to the stretching vibration of the Mo-O-Fe, Mo-O-Mo, and MoQO in FeMo 6 , respectively. 22 Both FC-66 and FMC-1 exhibit typical peaks at 1556 and 1434 cm À1 for the stretching vibrations V assy (-COO-) and V sym (-COO-) of carboxylate in H 2 BDC, respectively. 23 With increasing calcination time, the characteristic peaks of the carboxylate for FMC-2 and FMC-3 disappear, and is consistent with the XRD results.…”

Application of Nanozymes in Environmental Monitoring, Management, and Protection

“…During the detection, Cu-C 3 N 4 (Cu-C 3 N 4 @Apt) and benzo-4-chlorohexanedione (4-CD) produced by the oxidation of 4-chloro-1-naphthol (4-CN) in the presence of hydrogen peroxide participated in decreasing the photocurrent signal ( Figure 7 b). Polyoxometalates (POMS) of different structures have also been noted to possess peroxidase activity, among which P 2 Fe 4 W 18 enzyme activity was reported by Zhang et al [ 72 ] Polydopamine (PDA) as an emerging biomimetic adhesive polymer combines with P 2 Fe 4 W 18 to enhance enzyme activity ( Figure 7 a). Ultimately, Fe 4 P 2 W 18/ PDA achieved the detection of E. coli O157:H7 with a detection limit of 4.2 × 10 2 CFU/mL.…”