A Low-Temperature Hydrothermal Synthesis of Prussian Blue Nanocrystal and Its Application in H2O2 Detection. (21st July 2022)

• Record Type: Journal Article
• Authors: Yang, J.; Li, D. H.; Ji, L. L.
• Other Names: Ignjatovic Nenad Academic Editor.
• Is Part Of: Journal of chemistry. Volume 2022(2022)
• Publication Date: 2022-07-21
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1155/2022/7593873
• Languages: English
• ISSNs: 2090-9063

Abstract

Abstract : Uniform Prussian blue Fe3 [Fe(CN)6 ]2 nanocrystals were synthesized by a direct dissociation and reduction of the single-Fe(III)-source precursor K3 Fe(CN)6 under low-temperature hydrothermal conditions. UV-visible absorption spectrum, Fourier transform infrared spectrum, X-ray diffraction, field emission scanning electron microscope, X-ray photoelectron spectra, high-resolution transmission electron microscopy, and electrochemical testing were used to characterize and verify the synthesized Prussian blue nanocrystal product. The size of the synthesized product had a strong dependence on the acidity condition and the concentration of K3 Fe(CN)6 solution. This result may facilitate not only the exploration of preparing Fe3 [Fe(CN)6 ]2 nanocrystals for particular applications but also an in-depth explanation of the nature of the hydrothermal reaction. The Prussian blue nanocrystals were deposited onto an electrode support through lyotropic liquid crystalline templates to detect hydrogen peroxide (H2 O2 ) by reduction reaction. Cyclic voltammograms showed that the Prussian blue modified electrode was of excellent electrocatalytic activity for H2 O2 . This electrode demonstrated a detection limit (1 × 10 −7 M) and a linear range starting from the detection limit and extending over 6 orders of magnitude of H2 O2 concentrations (1 × 10 −7 to 1 × 10 −1 M), which was of excellent performance in detecting H2 O2 .