A one-pot and in situ synthesis of CuS-graphene nanosheet composites with enhanced peroxidase-like catalytic activity.
CuS-graphene nanosheet (GNS) composites with well-defined morphology have been successfully fabricated via a simple one-pot hydrothermal route by using thioacetamide (TAA) as both the sulfur source and reducing agent. The as-prepared CuS-GNS composites with an appropriate content of graphene exhibited an even higher peroxidase-like catalytic activity than pristine CuS nanoparticles in acetate buffer solution (pH = 4.0), which provided a facile method for the colorimetric detection of hydrogen peroxide (H2O2). It was calculated that H2O2 could be detected as low as 1.2 μM (S/N = 3) with a wide linear range from 2.0 to 20.0 μM (R(2) = 0.992), indicating that the as-prepared catalyst as an artificial peroxidase is promising for application in biosensors and environmental monitoring.
Alan G. MacDiarmid Institute, Jilin University, Changchun, 130012, P. R. China. xflu@jlu.edu.cn cwang@jlu.edu.cn.
Guangdi
G
Nie
Liang
L
Zhang
Xiaofeng
X
Lu
Xiujie
X
Bian
Weining
W
Sun
Ce
C
Wang
D002384:Catalysis; D003300:Copper / Q000737:chemistry* / Q000494:pharmacology; D018360:Crystallography, X-Ray; D006108:Graphite / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000378:metabolism*; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D008958:Models, Molecular; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D010544:Peroxidases / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D056951:Photoelectron Spectroscopy; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared
D006108:Graphite; D003300:Copper; D006861:Hydrogen Peroxide; D010544:Peroxidases; C017846:cupric sulfide