甲醛
原子层沉积
催化作用
吸附
纳米颗粒
Atom(片上系统)
化学
选择性
沉积(地质)
图层(电子)
分子
光化学
纳米技术
分析化学(期刊)
无机化学
材料科学
物理化学
有机化学
古生物学
沉积物
计算机科学
生物
嵌入式系统
作者
Lihao Zhou,Xiao Chang,Wei Zheng,Xianghong Liu,Jun Zhang
标识
DOI:10.1016/j.cej.2023.146300
摘要
Single atom catalysts (SACs) have demonstrated great potential in detection of toxic volatile organic compounds (VOCs) because of their high catalytic efficiency and unique electronic and chemical properties. In this study, we report an extremely sensitive and selective formaldehyde gas sensor based on single atom Rh-sensitized SnO2 nanoparticles prepared by atomic layer deposition (ALD). Gas sensing investigations demonstrate that the SnO2/Rh sensor has a response of 36.3 to 20 ppm formaldehyde, showing a nearly 23-fold enhancement over pure SnO2, as well as high sensitivity, fast response-recovery time (4–29 s) and excellent selectivity. DFT calculations reveal that the atomic Rh dramatically increases the adsorption and charge transfer between formaldehyde molecules and SnO2. By using the developed sensor, a portable formaldehyde detection device has been designed, which indicates a great prospect of our strategy in practical sensors.
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