title: Hierarchical hybrid film of MnO2 nanoparticles/multi-walled fullerene nanotubes-graphene for highly selective sensing of hydrogen peroxide.
abstract: Hierarchical hybrid films of MnO2 nanoparticles/multi-walled fullerene nanotubes-graphene (MNPs/MWFNTs-GS) have been prepared via a simple wet-chemical method. For this purpose, MWFNTs (~300nm in length) are fabricated from tailoring multi-walled carbon nanotubes (MWCNTs), and then inserted into GS to pile up into a hierarchical hybrid film with the in situ formative MNPs. Scanning electron microscope, transmission electron microscope and X-ray diffraction are used to confirm the morphology and structure of the as-obtained film. The electrochemical studies reveal that MNPs/MWFNTs-GS exhibit significantly enhanced electrocatalytic activity compared with MNPs/GS, and show a rapid response to H2O2 over a wide linear range of 2.0μM-8.44mM with a high sensitivity of 206.3μA mM(-1)cm(-2) and an excellent selectivity. These favorable electrochemical detection properties may be mainly attributed to the introduction of MWFNTs, which helps to promote the electron/ion transport between MNPs and GS and form the hierarchical film structure.
authors.affiliation: College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China; College of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Pan
authors.affiliation: College of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China.
authors.forename: Zhaohui
authors.initials: Z
authors.lastname: Hou
authors.affiliation: College of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Yi
authors.affiliation: College of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhu
authors.affiliation: College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 330022, China. Electronic address: zfy1012@126.com.
authors.forename: Fanyan
authors.initials: F
authors.lastname: Zeng
authors.affiliation: College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China. Electronic address: liuyounian@csu.edu.cn.
authors.forename: You-Nian
authors.initials: YN
authors.lastname: Liu
keywords: Electrochemical sensing; Graphene; Hierarchical hybrid film; Hydrogen peroxide; Multi-walled fullerene nanotubes