通过2D ZnO纳米结构和3D ZnO微结构的形态工程来调节灵敏度和工作温度，以检测有机胺,ACS Applied Nano Materials

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通过2D ZnO纳米结构和3D ZnO微结构的形态工程来调节灵敏度和工作温度，以检测有机胺
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2019-08-19 , DOI: 10.1021/acsanm.9b01044
Wenqiong Shi , Md. Maruf Ahmed , Shenghu Li , Yangyang Shang , Rui Liu , Tianyu Guo _{1,

2} , Ruihua Zhao ₃ , Jinping Li ₂ , Jianping Du ₂

Affiliation

二维（2D）材料在催化，光电/电子和传感器设备中具有独特的特性和优势。在这里，我们提出了一种通过草酸辅助水热法合成具有网格的二维ZnO纳米板的简便方法。通过改变热处理温度，可以实现ZnO从3D花状微粒到2D纳米网的形貌演变。通过代替草酸，获得了3D ZnO笼状球和六边形棱柱。结果表明，通过改变煅烧温度和添加剂可以容易地控制ZnO的2D和3D形态。所制备的ZnO用作检测挥发性有机化合物的传感材料，这表明它们的响应和选择性在很大程度上取决于ZnO形态的多样性。特别，已经证明基于2D ZnO纳米网的传感器可以有效地检测三乙胺（TEA），并且在260°C的100 ppm三乙胺暴露下，它表现出最大的灵敏度（213.3）。在300 ppm TEA中，其瞬态响应时间为1 s，恢复时间仅为5 s，低检测限为63 ppb，这意味着2D ZnO纳米网可以用作检测TEA的高效传感器平台。

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Regulating the Sensitivity and Operating Temperatures by Morphology Engineering of 2D ZnO Nanostructures and 3D ZnO Microstructures for the Detection of Organic-Amines

Two-dimensional (2D) materials possess unique properties and advantages in catalysis, photo/-electronic and sensor devices. Here, we proposed a facile route to synthesize 2D ZnO nanoplates with grids by the oxalic-acid-assisted hydrothermal method. Morphology evolutions of ZnO from 3D flower-like microparticles to 2D nanonets were achieved by changing the heat-treatment temperature. By substitution for oxalic acid, 3D ZnO cagelike spheres and hexagonal prism were obtained. The results show that 2D and 3D morphologies of ZnO can be controlled easily by changing calcinations temperatures and additives. The as-prepared ZnO was used as sensing materials for the detection of volatile organic compounds, which indicate that their responses and selectivity are strongly dependent on the diversity of ZnO morphologies. Particularly, 2D ZnO nanonets-based sensor has been proved to detect triethylamine (TEA) efficiently, and it exhibits maximum sensitivity (213.3) on the exposure of 100 ppm triethylamine at 260 °C. Its transient response time is 1 s and recovery time is only 5 s exposed 300 ppm TEA, and the low detection limit is 63 ppb, implying 2D ZnO nanonets can be served as an efficient sensor platform for the detection of TEA.

更新日期：2019-08-20

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