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Ultra‐Sensitive NO 2 Detection at Room Temperature Enabled by ZnO@MoO 3 Core‐Shell Nanocomposite
Author(s) -
Song Zihao,
Luo Junhao,
Ding Shumei,
Ding Jiabao,
Wang Qi,
Zhang Zhongxi,
Li Hongpeng,
Zhang Chao
Publication year - 2025
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.202401815
Subject(s) - nanocomposite , materials science , trimethylamine , heterojunction , humidity , nanotechnology , chemical engineering , selectivity , oxide , composite number , optoelectronics , composite material , chemistry , metallurgy , catalysis , organic chemistry , engineering , physics , thermodynamics
Abstract The sensitive detection of NO 2 is crucial for environmental monitoring and improving quality of life. Herein, a ZnO@MoO 3 core‐shell nanocomposite was fabricated via a simple stepwise solution self‐assembly and heat‐treatment process. Remarkably, the ZnO@MoO 3 sensor exhibited a high response value of 5.4 to 2 ppm NO 2 at room temperature. Furthermore, it displayed excellent selectivity against interference gases such as CO 2 , NH 3 , methanol, ethylene, and trimethylamine, along with outstanding stability and repeatability under varying humidity conditions. The exceptional sensing performance of the ZnO@MoO 3 sensor is attributed to the synergistic effects between ZnO and MoO 3 , as well as the enhanced electron transfer rate enabled by the heterostructures. This work provides an effective strategy for advancing NO 2 sensing capabilities in metal oxide composite sensors.
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