Intrinsic Peroxidase Catalytic Activity of Fe₇S₈ Nanowires Templated from [Fe₁₆S₂₀]/Diethylenetriamine Hybrid Nanowires

Abstract

Iron sulfide compounds are emerging as an important family of functional materials owing to their important properties and their applications in different technical fields. Well‐defined Fe7S8 nanowires templated by thermal decomposition of [Fe16S20]/diethylenetriamine hybrid nanowires under an argon atmosphere are reported. As‐prepared Fe7S8 nanowires show typical Michaelis–Menten kinetics and good affinity to both H2O2 and 3,3′,5,5′‐tetramethylbenzidine. At pH 7.0, the constructed UV/Vis sensor showed a linear range for the detection of H2O2 from 0.5 to 150 μM with a correlation coefficient of 0.9998. The H2O2 sensor based on the Fe7S8 nanowires shows a highly sensitive response and has better stability than horseradish peroxidase when exposed to solutions with different pH values and temperatures. These excellent properties make the as‐prepared Fe7S8 nanowires powerful tools for potential applications as an “artificial peroxidase” in biosensors and biotechnology.

Carbon-Shielded Three-Dimensional Co–Mn Nanowire Array Anchored on Ni Foam with Dual-Enzyme Mimic Performance for Selective Detection of Ascorbic Acid

“…Since Yan group first found that magnetic nanoparticles exhibit peroxidase simulation properties, the reports on enzyme mimetic properties of metal nanomaterials become more and more attractive . For example, iron-based materials (Fe 3 O 4 , Fe 2 O 3 , FeS, and Fe 7 S 8 ), − manganese-based materials (MnO 2 and Mn 3 O 4 ), , cobalt-based materials (Co 3 O 4 , CoS, and Co 9 S 8 ), − copper-based materials (CuO, Cu 2 O, and CuS), − vanadium-based materials (VO 2 , V 2 O 3 , and V 2 O 5 ), − etc. have been reported to exhibit enzyme mimetic properties.…”

Lysine-Functionalized Tungsten Disulfide Quantum Dots as Artificial Enzyme Mimics for Oxidative Stress Biomarker Sensing

“…The previous report of WS 2 nanosheets having peroxidase activity also displayed maximum activity at pH 4.0 . Yao et al in their work showed that iron sulfide nanowires had the potential as a peroxidase mimetic having maximum activity at a pH value of 4.0 . Vanadium oxide-mesoporous carbon composite showed peroxidase activity for detection of glucose.…”

Diethylenetriamine-assisted hydrothermal synthesis of dodecahedral α-Fe2O3 nanocrystals with enhanced and stable photoelectrochemical activity

“…1h, the powder X-ray diffraction (PXRD) pattern shows that the emergence of diffraction peaks is similar to the reported FeS-amine precursors. 60,61 Fourier transform infrared (FTIR) spectra (Fig. 1g, cyan line) and energy-dispersive X-ray spectroscopy (EDS) analysis (Fig.…”

“…FeS-DETA was synthesized using a modified method reported by Yu's group. 60,61 In a typical synthesis procedure, FeSO 4 Ĵ7H 2 O (0.2780 g), C 2 H 5 NS (0.1526 g), H 2 O (8 mL) and diethylenetriamine (DETA, 8 mL) were added to a Teflonlined autoclave with a capacity of 20 mL. The mixture was stirred for 20 min to form a homogeneous suspension.…”