Perylene diimide‐modified magnetic γ‐Fe 2 O 3 /CeO 2  nanoparticles as peroxidase mimics for highly sensitive colorimetric detection of Vitamin C | Zendy

Lian Jiajia | Zendy; Liu Pei | Zendy; Li Xiaocai | Zendy; Gao Linna | Zendy; Luo Xiliang | Zendy; Zhang Xiao | Zendy; Shi Zhiqiang | Zendy; Liu Qingyun | Zendy

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Perylene diimide‐modified magnetic γ‐Fe 2 O 3 /CeO 2 nanoparticles as peroxidase mimics for highly sensitive colorimetric detection of Vitamin C

Author(s) -

Lian Jiajia,

Liu Pei,

Li Xiaocai,

Gao Linna,

Luo Xiliang,

Zhang Xiao,

Shi Zhiqiang,

Liu Qingyun

Publication year - 2019

Publication title -

applied organometallic chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.53

H-Index - 71

eISSN - 1099-0739

pISSN - 0268-2605

DOI - 10.1002/aoc.4884

Subject(s) - chemistry , perylene , diimide , catalysis , nanoparticle , adsorption , detection limit , x ray photoelectron spectroscopy , aqueous solution , magnetic nanoparticles , raman spectroscopy , selectivity , nuclear chemistry , inorganic chemistry , analytical chemistry (journal) , chemical engineering , nanotechnology , organic chemistry , chromatography , molecule , materials science , physics , optics , engineering

Perylene diimide‐modified magnetic γ‐Fe 2 O 3 /CeO 2 nanoparticles (γ‐Fe 2 O 3 /CeO 2 ‐PDI) were prepared and exhibited excellent peroxidase‐like activity. The samples were characterized by HR‐TEM, XRD, Raman, N 2 adsorption, magnetic strength and XPS. The obtained γ‐Fe 2 O 3 /CeO 2 ‐PDI had size of 10~20 nm with high specific surface area of 77 m 2 /g, and could be easily separated from the aqueous solution by using a magnet, which are in favor of its practical application. Due to the decoration of PDI, the γ‐Fe 2 O 3 /CeO 2 ‐PDI possessed more surface defects (Ce 3+ ) and active oxygen species than that of γ‐Fe 2 O 3 /CeO 2 , resulting in the outstanding catalytic performance. And the composite catalyst also showed highly sensitive and selectivity toward VC with a limit of detection of 0.45 μM. Based on the fluorescent results, a possible hydroxyl radical (•OH) catalytic mechanism was proposed. It is believed that the as‐prepared γ‐Fe 2 O 3 /CeO 2 ‐PDI nanoparticles are promising biosensors applied for biomedical and food analysis.

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