期刊
MICROCHIMICA ACTA
卷 185, 期 9, 页码 -出版社
SPRINGER WIEN
DOI: 10.1007/s00604-018-2957-5
关键词
Microporous structure; Photometry; Catalytic activity; H2O2 detection
资金
- National Key Basic Research Project [2014CB643304]
- National Natural Science Foundation of China [41576080, 41706080]
Various 3-dimensional C/CeO2 hollow nanostructure frameworks (3D C/CeO2 HNFs) were synthesized by using a polymer blowing process that is accelerated by adding a certain amount of cerium nitrate. Polyvinylpyrrolidone was used as the polymer. The resulting HNFs were characterized by scanning electron microscopy, energy dispersive spectrometry, X-ray diffraction, and X-ray photoelectron spectroscopy. The HNFs possess a large specific surface area, and the CeO2 nanocrystals consist of a single phase. The HNFs display intrinsic peroxidase-like activity and can catalyze the oxidation of the peroxidase substrate 3,3',5,5'-tetramethylbenzidine in the presence of H2O2 to produce a blue product. The method was applied to the quantification of H2O2 with a 5.2 nM detection limit. The analytical range is from 10 nM to 1 mu M.
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