Facile synthesis of ultrathin MnO2 nanobelts anchoring on porous carbon with high oxidase mimetic activity for L-cysteine colorimetric detection

Synthesis of Ti3C2Tx/MnO2 composites for synergistic catalytic/photothermal-based bacterial inhibition

“…According to previous reports, 44–46 MnO 2 exhibits OXD-like activity. So, the enzyme-like activity of the synthesized Ti 3 C 2 T x /MnO 2 composites was investigated.…”

In Situ Conversion of MnO Nanoparticles with Excellent Oxidase-like Activity in Building a Fluorescence Sensing Platform for Cysteine and Cu2+ Sequential Detection

“…Meanwhile, PC acts as a scaffold to support the as-prepared MnO 2 NBs. 33 Through calcination at 400 °C under an Ar flow, successful conversion of MnO 2 NBs to MnO NPs was realized. As shown in Figure 1a, XRD patterns of MnO 2 NBs/PC show two broad peaks at 37.0 and 65.5°contributing to the (311) and (440) planes of MnO 2 (JCPDS No.…”

“…Based on the slope of the calibration curve (S) and standard deviation of blank signals (σ), the limit of detection (LOD) was estimated to be 0.0061 μM using the formula 3σ/S. In comparison with these sensors for Cys detection, such as Fe 3 O 4 nanofibers, 39 MnO 2 nanobelts, 33 OV−Mn 3 O 4 NFs, 30 MoS 2 −PPy-Pd nanotubes, 40 gold nanoclusters, 24 and VS 4 , 41 the present MnO NPs/PC-AR system shows a lower LOD (Table S1). The higher performance should be ascribed to the higher oxidase mimetic activity of MnO NPs, which may have resulted from their small size and uniform distribution on the PC surface, as well as the abundant OVs on their surface.…”

Tailoring the Enzyme-Mimetic Activity and Surface Nanostructure of Metal-Phenolic Platform for Colorimetric Detection of l-Cysteine

“…The activity of nanomaterials can be tuned by their shapes, surface chemical structures, pore sizes, and valences of metal ions. Thus, the rational design and precise construction of the morphology and valences provide the huge potential for customizing the enzyme-like activities of nanomaterials. − Unsatisfactorily, these enzyme-like nanomaterials such as noble metals, metal oxides, and carbon nanostructures require additional amount of energy consumption to meet synthesis conditions (high temperature, high pressure, strong oxidizing environment, electric energy, ultrasonic, and so on), which also make the synthesis process harmful to the environment. ,− For example, MnCo 2 O 4 , FeP@C, and ov-Mn 3 O 4 , are synthesized up to 800 °C; V 2 O 5 and Mn-UMOF require the additional energy supply, such as ultrasonic; LaMnO 3+δ , Mo 6+ -Doped Co 3 O 4 , and NiO need organic solvents. Meanwhile, considering the intersection of catalytic chemistry and biosensing, the biosecurity and potential toxicity of the platforms remain challenging and worrisome, which significantly limit further clinical application.…”