Abstract
In this article, we report a facile method to fabricate free-standing reduced graphene oxide paper (rGOP) by vacuum filtration. Pt nanoparticles were electrodeposited on reduced graphene oxide paper to construct a sensitive and flexible hydrogen peroxide (H2O2) sensor. The properties of Pt/rGOP were characterized by scanning electron microscopy, energy dispersive X-ray, X-ray photoelectron spectroscopy and Raman spectroscopy. The electrochemical characterizations of the resulting sensor were carried out by cyclic voltammetry, chronoamperometry and electrochemical impedance spectroscopy. The Pt/rGOP hybrid electrode had an excellent electrochemical property, with superb electrocatalytic activity, a large electrochemical active surface area, flexibility and high stability. The linear ranges of the as-prepared sensor for H2O2 detection were divided into two linear sections: 0.2 μmol/L to 2.0 mmol/L and 2.0 to 8.5 mmol/L, with a detection limit of 100 nmol/L (S/N = 3) and a response time of less than 5 s. The proposed sensor has great potential to become a reliable and flexible tool in biosensor and point-of-care medical devices.
Highlights
Hydrogen peroxide (H2 O2 ) is one of the products during enzyme catalyzing, such as glucose oxidase, which is closely related to diverse physiological and pathological consequences including aging, organ injury and cancer, has received enormous attentions in academy and industry [1,2,3,4,5,6].There is great need to detect H2 O2 in environmental, industrial and clinic fields [7]
The HI-reduced graphene oxide paper was rinsed with DI water and ethanol several times, and the reduced graphene oxide paper was dried at room temperature
Free-standing reduced graphene oxide paper (rGOP) is fabricated through vacuum filtration, followed by chemical reduction in HI aqueous solution
Summary
Hydrogen peroxide (H2 O2 ) is one of the products during enzyme catalyzing, such as glucose oxidase, which is closely related to diverse physiological and pathological consequences including aging, organ injury and cancer, has received enormous attentions in academy and industry [1,2,3,4,5,6]. The large surface area and good electronic properties of of graphene considered advantages advantagesofofananalternative alternative electrode material sensors [24,25]. GO can be manufactured intobefree-standing reduced graphene oxide paper graphene oxide paper (rGOP), with thicknesses ranging from to μm [39]. Free-standing reduced grapheneoxide oxidepaper paper could be an alternative to the traditional glassy carbon electrode, as the substrate for detection of. PtNPs onon free-standing reduced graphene oxide paper has has good linear responses. Theas-prepared as‐preparedflexible flexible and free‐standing reduced graphene oxide paper nmol/L and free-standing reduced graphene oxide paper has has great potential in real applications, especially for biosensor and point‐of‐care medical devices.
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