State Key Laboratory on Integrated Optoelectronics, Jilin Province Key Laboratory on Advanced Gas Sensors, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
State Key Laboratory on Integrated Optoelectronics, Jilin Province Key Laboratory on Advanced Gas Sensors, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
J Colloid Interface Sci. 2018 Aug 15;524:368-378. doi: 10.1016/j.jcis.2018.04.033. Epub 2018 Apr 10.
Nitrogen dioxide (NO), as a typical threatening atmospheric pollutant, is hazardous to the environment and human health. Thus, the development of a gas sensor with high response and low detection limit for NO detection is highly important. The highly ordered mesoporous indium trioxide (InO) prepared by simple nanocasting method using mesoporous silica as template and decorated with Au nanoparticles was investigated for NO detection. The prepared materials were characterized by X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy. Characterization results showed that the samples exhibited ordered mesostructure and were successfully decorated with Au. The gas sensing performance of the sensors based on a series of Au-loaded mesoporous InO were systematically investigated. The Au loading level strongly affected the sensing performance toward NO. The optimal sensor, which was based on 0.5 wt% Au-loaded InO, displayed high sensor response and low detection limit of 10 ppb at low operating temperature of 65 °C. The excellent sensing properties were mainly attributed to the ordered mesoporous structure and the catalytic performance of Au. We believe that the Au-loaded mesoporous InO can provide a promising platform for NO gas sensors with excellent performance.
二氧化氮（NO）作为一种典型的威胁性大气污染物，对环境和人体健康都具有危害性。因此，开发一种对 NO 具有高响应和低检测限的气体传感器对于 NO 的检测非常重要。本文采用简单的纳米铸造法，以介孔硅为模板，制备了高度有序的介孔氧化铟（InO），并负载了金纳米粒子，用于 NO 检测。通过 X 射线衍射、透射电子显微镜和 X 射线光电子能谱对制备的材料进行了表征。表征结果表明，样品具有有序的介孔结构，并成功负载了金。系统研究了一系列负载金的介孔 InO 基传感器的气敏性能。金的负载量对 NO 的传感性能有很大的影响。基于 0.5wt%Au 负载的 InO 的最佳传感器在 65°C 的低工作温度下表现出高的传感器响应和低的检测限（10ppb）。优异的传感性能主要归因于有序的介孔结构和 Au 的催化性能。我们相信，负载金的介孔 InO 可为具有优异性能的 NO 气体传感器提供一个有前景的平台。
