纳米棒
材料科学
兴奋剂
纳米颗粒
膜
纳米技术
吸附
半导体
选择性
分子
光电子学
化学
生物化学
有机化学
催化作用
作者
Mengtao Sun,Mingyuan Wang,Chuanxin Ge,Jingran Huang,Yuanfan Li,Pengjia Yan,Mingsong Wang,Shuangying Lei,Linquan Bai,Guanjun Qiao
标识
DOI:10.1016/j.snb.2023.133632
摘要
The exploration of novel NO2 sensors with high performance is of great importance for air quality monitoring and human health. In this work, Au-doped [email protected] core-shell nanorod arrays were fabricated for high-performance NO2 detection. Due to the spill-over effects of Au nanoparticles, gas enriching and molecular sieving effects provided by ZIF-7 membranes, the [email protected] sensor affords highly sensitive and selective detection of NO2. The heterostructured [email protected] allows for ppb-level detection of NO2 (Response = 1.7–5 ppb) with excellent repeatability and provides improved selectivity, anti-humidity capacity, and long-term stability compared with bare ZnO, Au-doped ZnO or [email protected] core-shell nanorod arrays. According to the calculation of density functional theory (DFT), the [email protected] sensor renders higher adsorption energy towards NO2 molecules compared with the aforementioned other materials, which also explains its outstanding sensing performances. We believe our approach that combines noble metals doped semiconductor metal oxides (SMOs) and MOF filtration membranes can be further extended to numerous new heterostructured [email protected] materials, which opens venues to the development of advanced chemiresistive gas sensors.
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