Colorimetric assay for the detection of dopamine using bismuth ferrite oxide (BiFeO) nanoparticles as an efficient peroxidase-mimic nanozyme.

This work describes the preparation of ternary bismuth ferrite oxide nanoparticles (BiFeO NPs) with an enzyme mimetic activity for dopamine (DA) qualitative and quantitative detection. BiFeO NPs were prepared using a facile, low cost, and one-pot hydrothermal treatment. The chemical composition, morphology, and optical properties of BiFeO nanozyme were characterized using different techniques such as Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction pattern (XRD), X-ray photoelectron spectroscopy (XPS), thermo-gravimetric analysis (TGA), dynamic light scattering (DLS), field-emission scanning electron microscopy (FESEM) imaging, FESEM-energy dispersive X-ray spectroscopy (EDS), UV-vis absorption, and fluorescence emission spectroscopy.

Photocatalytic Performance of Perovskite and Metal-Organic Framework Hybrid Material for the Reduction of N to Ammonia.

The orthorhombic phase of KNbO perovskite has been applied for nitrogen (N) photoreduction to ammonia (NH). However, this material suffers from a low surface area and low ammonia production efficiency under UV light irradiation. To eliminate these barriers, we used a metal-organic framework (MOF), named as TMU-5 ([Zn(OBA)(BPDH)]·1.