Facile preparation of Prussian blue/polypyrrole hybrid nanofibers as robust peroxidase mimics for colorimetric detection of l-cysteine. (7th February 2018)

• Record Type: Journal Article
• Authors: Song, Na; Zhu, Yun; Ma, Fuqiu; Wang, Ce; Lu, Xiaofeng
• Is Part Of: Materials chemistry frontiers. Volume 2:Number 4(2018)
• Page Start: 768
• Page End: 774
• Publication Date: 2018-02-07
• Subjects: Materials science -- Periodicals; Chemistry -- Periodicals; 540
• DOI: 10.1039/c7qm00571g
• Languages: English
• ISSNs: 2052-1529

Abstract

Abstract : Prussian blue/polypyrrole hybrid nanofibers as efficient peroxidase mimics for the sensitive detection ofl -cysteine have been developed. Abstract : A facile and sensitive detection ofl -cysteine is essential for biosensors, environmental monitoring and medical diagnosis. In this study, a simple approach has been demonstrated to prepare Prussian blue (PB)/polypyrrole (PPy) hybrid nanofibers as efficient peroxidase-like mimics for the determination ofl -cysteine. α-Fe2 O3 nanofibers act as both templates and a source of Fe 3+ to polymerize pyrrole in an acidic environment, resulting in the formation of PB/PPy hybrid nanofibers. The as-prepared PB/PPy hybrid nanofibers show a superior catalytic activity as peroxidase mimics over α-Fe2 O3 nanofibers. Due to the high catalytic efficiency of the resultant PB/PPy hybrid nanofibers, we have developed a simple colorimetric approach for the rapid and sensitive determination ofl -cysteine with a detection limit of about 16 nM over a wide linear range from 1 to 20 μM. In addition, the detection system displays a high selectivity towardl -cysteine over other amino acids, glucose, and common ions. This work provides a new strategy for the preparation of peroxidase-like nanomaterials with improved catalytic activity, which shows great promise for application in highly sensitive detection.