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Erschienen in: Journal of Materials Science 19/2018

02.07.2018 | Chemical routes to materials

Synergistically enhanced peroxidase-like activity of Pd nanoparticles dispersed on CeO2 nanotubes and their application in colorimetric sensing of sulfhydryl compounds

verfasst von: Xin Li, Zhilong Pu, Hao Zhou, Wenchi Zhang, Xiangheng Niu, Yanfang He, Xuechao Xu, Fengxian Qiu, Jianming Pan, Liang Ni

Erschienen in: Journal of Materials Science | Ausgabe 19/2018

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Abstract

In this work, we proposed a new hybrid of Pd nanoparticles dispersed on CeO2 nanotubes (Pd NPs/CeO2 NTs) with synergistically enhanced peroxidase-like activity for the visual detection of sulfhydryl compounds. In comparison with individual Pd NPs and CeO2 NTs, the Pd NPs/CeO2 NTs hybrid exhibited a synergy effect to trigger the oxidation of colorless 3,3′,5,5′-tetramethylbenzidine (TMB) to its blue product TMBox mediated by H2O2. It was further demonstrated that the improved activity observed in Pd NPs/CeO2 NTs originated from the strong interplays between Pd NPs and CeO2 NTs, which could significantly increase the Ce3+/Ce4+ ratio. Besides, sulfhydryl compounds were found to have the capacity to suppress the color reaction of TMB + H2O2 catalyzed by the Pd NPs/CeO2 NTs nanozyme at a low level. Based on this principle, mercaptoacetic acid in the concentration range of 66–400 nM could be linearly determined. Similarly, sulfhydryl-containing amino acid (cysteine) and its derivative (glutathione) in the linear scope of 6–40 nM were also detected, providing a detection limit down to 2.9 and 11.3 nM, respectively.

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Metadaten
Titel
Synergistically enhanced peroxidase-like activity of Pd nanoparticles dispersed on CeO2 nanotubes and their application in colorimetric sensing of sulfhydryl compounds
verfasst von
Xin Li
Zhilong Pu
Hao Zhou
Wenchi Zhang
Xiangheng Niu
Yanfang He
Xuechao Xu
Fengxian Qiu
Jianming Pan
Liang Ni
Publikationsdatum
02.07.2018
Verlag
Springer US
Erschienen in
Journal of Materials Science / Ausgabe 19/2018
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-018-2657-x

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