Ma Zhuangzhuang, Yang Kai, Xiao Changlin, Jia Lichao
Key Laboratory of Applied Surface and Colloid Chemistry, National Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, 620 West Chang'an Street, Xi'an, Shaanxi 710119, China.
Key Laboratory of Applied Surface and Colloid Chemistry, National Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, 620 West Chang'an Street, Xi'an, Shaanxi 710119, China.
J Hazard Mater. 2021 Aug 15;416:126118. doi: 10.1016/j.jhazmat.2021.126118. Epub 2021 May 24.
The real-time monitoring of NO in the low-concentration range from the ppb- to ppm-level is of great importance in the field of healthcare; however, accomplishing this is still challenging owing to the technical issues regarding highly efficient and selective sensing materials. In this study, we demonstrate the highly sensitive and selective detection of NO by Bi-doped SnO two-dimensional ultrathin nanosheets with porous structures, fabricated using a facile one-step electrospinning method. It was found that the SnO with 0.75 mol% Bi exhibits the highest sensitivity of 217-10 ppm of NO at a relatively low temperature of 75 °C. Further, a low detection limit of 50 ppb; high selectivity; and good stability have also been achieved. Further detailed analysis indicates that the promising sensing properties can be attributed to the ultrathin nanosheet structure, which has a high surface area and abundant pores. These results indicate that 2D metal-oxide ultrathin nanosheets achieve superior gas-sensing performance, and Bi-doped SnO is a potential material for use in the real-time and low-power detection of NO.
在医疗保健领域，对十亿分之一到百万分之一浓度范围内的一氧化氮（NO）进行实时监测至关重要；然而，由于高效和选择性传感材料的技术问题，实现这一目标仍然具有挑战性。在本研究中，我们展示了通过使用简便的一步电纺丝方法制备的具有多孔结构的铋掺杂二氧化锡二维超薄纳米片对NO进行高灵敏度和选择性检测。结果发现，含0.75 mol%铋的二氧化锡在75°C的相对低温下对10 ppm的NO表现出最高灵敏度217。此外，还实现了50 ppb的低检测限、高选择性和良好的稳定性。进一步详细分析表明，这种有前景的传感性能可归因于具有高表面积和丰富孔隙的超薄纳米片结构。这些结果表明二维金属氧化物超薄纳米片具有卓越的气敏性能，铋掺杂二氧化锡是用于NO实时和低功耗检测的潜在材料。
