Needle-Shaped WO3 Nanorods for Triethylamine Gas Sensing
Needle-Shaped WO3 Nanorods for Triethylamine Gas Sensing
复制标题
用于三乙胺气体传感的针状 WO3 纳米棒
DOI：
10.1021/acsanm.0c01731
复制
发表时间：
2020-09-25
影响因子：
5.9
通讯作者：
Feng, Liang
中科院分区：
文献类型：
--
作者：
Hu, Qi;He, Jiaqi;Feng, Liang
准确、快速地监测三乙胺（TEA）对人类健康、环境保护和食品安全具有重要意义。在此，我们通过简单的水热法和随后的煅烧制备了具有针状纳米棒形貌的WO3样品。所制得的WO3针状纳米棒长5 μ m，直径400 nm，形貌均匀，便于大规模产业化。基于针状WO3纳米棒的传感对TEA表现出超灵敏的响应，在250℃下对1 ppm TEA的响应高达6.7，并且观察到出色的选择性和可重复性。优异的传感性能初步归因于TEA中均匀而大规模的形貌、高活性的C-N键以及WO3与TEA之间有效的相互作用。将该传感器直接应用于草鱼48 h的TEA监测，结果表明，该传感器的响应与保存时间呈良好的线性关系（R-2 = 0.996），证明了其在日常应用中的良好前景。该结构策略为WO3针状纳米棒的大规模实用化制造开辟了一条可行的途径，也是将该传感器用于海洋食品安全检测中痕量TEA检测的开创性尝试。
The accurate and rapid monitoring of triethylamine (TEA) is highly desired for human health, environmental protection, and food safety. Herein, we have fabricated a WO3 sample with a morphology of needle-shaped nanorods via a simple hydrothermal method and subsequent calcination. The WO3 needle-shaped nanorods with 5 mu m length and 400 nm diameter possess a uniform and homogeneous morphology, which avails large-scale industrialization. The sensing based on needle-shaped WO3 nanorods exhibits an ultrasensitive response to TEA, with a response up to 6.7 toward 1 ppm TEA at 250 degrees C. The outstanding selectivity and repeatability are observed as well. The excellent sensing performance is tentatively attributed to the uniform and large-scale morphology, highly active C-N bonds in TEA, and the effective interaction between WO3 and TEA. Furthermore, the sensor is directly employed to monitor the TEA given off from a grass carp in 48 h, and a good linearity (R-2 = 0.996) between the response and preserving time is obtained, proving its promising prospect in daily use. The architecture strategy opens an available route for large-scale practical fabrication of WO3 needle-shaped nanorods, and it is a pioneering attempt to apply the sensor for trace TEA detection in marine food safety testing.