In situ electrodeposition of mesoporous aligned α-Fe2O3 nanoflakes for highly sensitive nonenzymatic H2O2 sensor

被引：28

作者：

Cai, Jiajia ^{[1
]}

Ding, Shilei ^{[1
]}

Chen, Guang ^{[1
]}

Sun, Yunlan ^{[1
]}

Xie, Qian ^{[2
]}

机构：

[1] Anhui Univ Technol, Sch Energy & Environm, Maanshan 243002, Peoples R China

[2] Anhui Univ Technol, Sch Met Engn, Maanshan 243032, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2018年 / 456卷

基金：

中国国家自然科学基金;

关键词：

Mesoporous alpha-Fe2O3 nanoflakes; H(2)O(2 )sensor; Crystal orientation; High sensitivity; Electrochemical catalysts; HYDROGEN-PEROXIDE; OXIDE; NANOPARTICLES; ELECTROCHEMISTRY; GRAPHENE; DESIGN;

D O I：

10.1016/j.apsusc.2018.06.108

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：302 / 306

页数：5

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