Improved peroxidase-mimic property： Sustainable, high- efficiency interfacial catalysis with H2O2 on the surface of vesicles of hexavanadate-organic hybrid surfactants

An emerging method for effectively improving the catalytic activity of metal oxide hybrids involves the creation of metal oxide interfaces for facilitating the activation of reagents. Here, we demonstrate that bilayer vesicles formed from a hexavanadate cluster functionalized with two alkyl chains a...

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Bibliographic Details
Published in:Nano research 2018-03, Vol.11 (3), p.1313-1321
Main Authors: Chen, Kun, Bayaguud, Aruuhan, Li, Hui, Chu, Yang, Zhang, Haochen, Jia, Hongli, Zhang, Baofang, Xiao, Zicheng, Wu, Pingfan, Liu, Tianbo, Wei, Yongge
Format: Article
Language:English
Subjects:
Atomic/Molecular Structure and Spectra
Biological activity
Biomedicine
Biotechnology
Catalysis
Catalysts
Catalytic activity
Catalytic oxidation
Chemistry and Materials Science
Condensed Matter Physics
H2O2
催化作用
表面活化剂
模仿
金属氧化物
性质
混合
器官
Hybrids
Hydrogen peroxide
Hydrophobicity
Interfaces
Materials Science
Metal oxides
Metals
Mimicry
Nanomaterials
Nanotechnology
Noble metals
Oxidation
Peroxidase
Pollutants
Reagents
Research Article
Substrates
Surfactants
Vesicles
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Summary:An emerging method for effectively improving the catalytic activity of metal oxide hybrids involves the creation of metal oxide interfaces for facilitating the activation of reagents. Here, we demonstrate that bilayer vesicles formed from a hexavanadate cluster functionalized with two alkyl chains are highly efficient catalysts for the oxidation of 3,3＇,5,5＇-tetramethylbenzidine （TMB） with H2O2 at room temperature, a widely used model reaction mimicking the activity of peroxidase in biological catalytic oxidation processes. Driven by hydrophobic interactions, the double-tailed hexavanadate-headed amphiphiles can self-assemble into bilayer vesicles and create hydrophobic domains that segregate the TMB chromogenic substrate. The reaction of TMB with H2O2 takes place at the interface of the hydrophilic and hydrophobic domains, where the reagents also make contact with the catalytic hexavanadate clusters, and it is approximately two times more efficient compared with the reactions carried out with the corresponding unassembled systems. Moreover, the assembled vesicular system possesses affinity for TMB comparable to that of reported noble metal mimic nanomaterials, as well as a higher maximum reaction rate.
ISSN:1998-0124
1998-0000
DOI:10.1007/s12274-017-1746-5