Palladium nanoparticles modified electrospun CoFe2O4 nanotubes with enhanced peroxidase-like activity for colorimetric detection of hydrogen peroxide. Issue 40 (6th April 2016)

• Record Type: Journal Article
• Authors: Yang, Zezhou; Zhang, Zhen; Jiang, Yanzhou; Chi, Maoqiang; Nie, Guangdi; Lu, Xiaofeng; Wang, Ce
• Is Part Of: RSC advances. Volume 6:Issue 40(2016)
• Page Start: 33636
• Page End: 33642
• Publication Date: 2016-04-06
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra01527a
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Herein, we report a simple procedure to decorate small palladium nanoparticles (Pd NPs) on the surface of CoFe2 O4 nanotubes; the decorated nanotubes possess intrinsic peroxidase-like activity for the sensitive detection of H2 O2 . Abstract : Herein, we report a simple procedure to decorate small palladium nanoparticles (Pd NPs) on the surface of CoFe2 O4 nanotubes; the decorated nanotubes possess intrinsic peroxidase-like activity for the sensitive detection of H2 O2 . The CoFe2 O4 nanotubes are prepared via an electrospinning technique, followed by a calcination process in air. The functionalization of Pd NPs on the surface of CoFe2 O4 nanotubes was achieved through an in situ reduction process using ascorbic acid (AA) as a reducing agent. The synthesized Pd nanoparticles, which are small in size, are evenly dispersed on the surface of the CoFe2 O4 nanotubes. The hollow structure of the CoFe2 O4 nanotubes and the uniform distribution of the Pd nanoparticles enhance peroxidase-like activity toward the catalytic oxidation of the peroxidase substrate 3, 3′, 5, 5′-tetramethylbenzidine (TMB) in the presence of H2 O2 . The peroxidase-like property of the Pd/CoFe2 O4 composite nanotubes provides a facile approach for the colorimetric detection of H2 O2 with a low detection limit. This work provides great potential for Pd/CoFe2 O4 nanotubes as enzyme-like nanocatalysts to sensitively detect H2 O2 in biological systems.