期刊
APPLIED SURFACE SCIENCE
卷 456, 期 -, 页码 302-306出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2018.06.108
关键词
Mesoporous alpha-Fe2O3 nanoflakes; H(2)O(2 )sensor; Crystal orientation; High sensitivity; Electrochemical catalysts
类别
资金
- Research Foundation of Young Teachers in Anhui University of Technology [QZ201720, QZ201605]
- Open Foundation of State Key Laboratory of Rolling Technology and Automatic Rolling, Northeastern University [2016006]
- National Natural Science Foundation of China [51674004, 51676001]
Mesoporous aligned hematite nanoflakes (MA-alpha-Fe2O3) were in situ electrochemically synthesized on the fluorine-doped fin oxide coated glass (FTO) substrate and studied for electrocatalytic reduction and sensing H2O2. Morphology and crystallinity of films were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM). The vertical aligned MA-alpha-Fe2O3 mesostructured films showed (1 1 0) preferential growth, offering both the fast electron transfer path and diffusion of reactants and products. Thus the sensing performance of MA-alpha-Fe(2)O(3 )displayed an unprecedented sensitivity of 422.5 mu A/(mM cm(2)), a wide linear range up to 3.145 mM and an excellent detection limit of 22 mu M. Furthermore, the sensor also exhibited good anti-interference, reproducibility, stability, feasibility for real sample detection. These results indicated that MA-alpha-Fe2O3 could be a promising electrochemical material as nonenzymatic H2O2 sensor.
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