Transformations of ferrihydrite during calcination and sulphidation

Hellgardt, Klaus; Chadwick, David

doi:10.1016/s0920-5861(98)00411-8

Cited by 6 publications

(1 citation statement)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Brunauer–Emmett–Teller (BET) surface area of the sheet‐like FeS nanostructure calculated from N 2 adsorption isotherm was 48.2 m 2 g −1 , which was much larger than 2.0 m 2 g −1 of bulk FeS18 and 14.9 m 2 g −1 of core‐shell FeS nanoparticles with carbon as the shell 19. Such a nanostructure with a large surface area might be of great significance for its potential application in sensing, optical devices and catalysis.…”

Section: Resultsmentioning

confidence: 97%

Nanostructured FeS as a Mimic Peroxidase for Biocatalysis and Biosensing

Dai¹,

Liu²,

Bao³

et al. 2009

Chemistry A European J

295

155

View full text Add to dashboard Cite

Artificial enzyme mimics have attracted considerable interest due to easy denaturation and leakage of enzymes during their storage and immobilization procedure. Herein we describe the design of a novel mimic peroxidase, a nanostructure of sheet-like FeS prepared by a simple micelle-assisted synthetic method. Such a nanostructure has a large specific surface area and high peroxidase-like activity, and was thus further used as a mimic enzyme for the development of biocatalysts and amperometric biosensors. The sheet-like FeS nanostructure showed typical Michaelis-Menten kinetics and good affinity to both H(2)O(2) and 3,3',5,5'-tetramethyl benzidine. At pH 7.0 the constructed amperometric sensor showed a linear range for the detection of H(2)O(2) from 0.5 to 150 microM with a correlation coefficient of 0.9998 without any electron transfer mediator. The H(2)O(2) sensor based on the sheet-like FeS showed more sensitive response than those based on spherical FeS nanostructure, and resulted in a better stability than horseradish peroxidase when they were exposed to solutions with different pH values and temperatures. These excellent properties made the sheet-like nanostructured FeS powerful tools for a wide range of potential applications as an "artificial peroxidase" as biosensors and biotechnology.

show abstract

Section: Resultsmentioning

confidence: 97%