基于具有电子极性传输特性的 SnO2/NiO 异质结改性 ZnO 纳米片的高选择性 ppb 级丁酮传感器,ACS Sensors

当前位置： X-MOL 学术 › ACS Sens. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

基于具有电子极性传输特性的 SnO2/NiO 异质结改性 ZnO 纳米片的高选择性 ppb 级丁酮传感器
ACS Sensors ( IF 8.2 ) Pub Date : 2023-06-23 , DOI: 10.1021/acssensors.3c00475
Hongmin Zhu ₁ , Zhenyu Yuan _{1,

2,

3,

4} , Yanbai Shen ₅ , Hongliang Gao _{1,

2,

3,

4} , Fanli Meng _{1,

2,

3,

4}

Affiliation

气体传感器需要构建具有高反应活性的复合材料以降低检测限，但这会导致吸附的氧气和目标气体之间产生广谱响应，从而难以提高选择性。本研究首次在气体传感中发现了二维异质结材料的电子极性输运特性，并利用该现象极大地提高了丁酮传感器的选择性。_{合成了用 SnO 2} /NiO 异质颗粒改性的超薄多孔ZnO 纳米片，丁酮的检测限达到 20 ppb，响应范围为 328 至 100 ppm 丁酮，这是已知的最低检测限。反应动力学和液相色谱-质谱联用揭示了SnO ₂ /NiO异质颗粒良好的协同催化作用，这可能有助于丁酮的高响应和低检测限。最后，分析了二维异质结材料中电子极性输运现象产生的可能机制。这项工作为实现气体传感器的选择性和检测限提供了新颖的视角，具有普遍适用性和应用潜力。

"点击查看英文标题和摘要"

Highly Selective and ppb-Level Butanone Sensors Based on SnO2/NiO Heterojunction-Modified ZnO Nanosheets with Electron Polarity Transport Properties

Gas sensors require the construction of composites with high reactivity to reduce the detection limit, but this can lead to a broad-spectrum response between the adsorbed oxygen and the target gas, making it difficult to improve selectivity. In this study, the phenomenon of electron polar transport properties of the two-dimensional heterojunction material is first discovered in gas sensing and utilized to greatly improve the selectivity of butanone sensors. Ultra-thin porous ZnO nanosheets modified with SnO₂/NiO heterogeneous particles are synthesized to achieve 20 ppb detection limits for butanone with a response of 328 to 100 ppm butanone, which is the lowest known detection limit. The combination of reaction kinetics and liquid chromatography–mass spectrometry reveals a good synergistic catalytic effect of SnO₂/NiO heterogeneous particles, which may contribute to the high response and low detection limit of butanone. Finally, the possible mechanism for the generation of electron polar transport phenomenon is analyzed in the two-dimensional heterojunction material. This work provides a novel perspective for achieving both selectivity and detection limits in gas sensors, with universal applicability and application potential.

更新日期：2023-06-23

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南