Premium
Construction of Hierarchical α‐Fe 2 O 3 /SnO 2 Nanoball Arrays with Superior Acetone Sensing Performance
Author(s) -
Wang Peng,
Wang SuZhen,
Han Qing,
Zou DongQinq,
Zhao WenKai,
Wang XueDong,
Luo Chen,
Yang Xin,
Wu Xing,
Xie WanFeng
Publication year - 2021
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.202001831
Subject(s) - materials science , acetone , nanostructure , relative humidity , hydrothermal circulation , nanocomposite , porosity , chemical engineering , nanotechnology , composite material , organic chemistry , chemistry , physics , engineering , thermodynamics
Gas sensors based on SnO 2 , Fe 2 O 3 , and their nanocomposites are promising candidates for sensing of acetone, ethanol, hydrogen, NO 2 , ozone, and formaldehyde. In this work, a rational hydrothermal route is designed to prepare α‐Fe 2 O 3 /SnO 2 porous sphere arrays assembled with hierarchical nanostructure (denoted as α‐Fe 2 O 3 ( x %)/SnO 2 ). The results demonstrate that the α‐Fe 2 O 3 (4%)/SnO 2 based sensor exhibits excellent sensing performance, the short response/recovery time of 3 and 4 s, respectively. A very low working temperature of 200 °C, wide linear detection range (from 500 ppb to 500 ppm), and long‐term cycling stability of as long as 90 days, and stable performance at 80% of relative humidity. The sensing signals can be accurately sampled and processed by the integrated circuit system, to collect and monitor the acetone concentration alteration signals in real time. Furthermore, the gas sensing performance is interpreted by the functions of hierarchical nanostructure and synergistic effect of Fe 2 O 3 /SnO 2 nanohybrids.