Su Yue, Chen Peng, Wang Pengjian, Ge Jing, Hu Shi, Zhao Yuxin, Xie Gang, Liang Wenjie, Song Peng
School of Physics, Liaoning University Shenyang 110036 P. R. China
Beijing National Center for Condensed Matter Physics, Beijing Key Laboratory for Nanomaterials and Nanodevices, Institute of Physics, Chinese Academy of Sciences Beijing 100190 P. R. China
RSC Adv. 2019 Feb 18;9(11):5987-5994. doi: 10.1039/c8ra09156k.
Herein, a high dynamic range HS micro gas sensor was achieved using hierarchical Pd-loaded SnO nanostructures as a sensing material. SnO nanospheres were synthesized using a hydrothermal method without any surfactants or templates, followed by Pd nanoparticle decoration a facile method. A hierarchical nanostructure of Pd-loaded SnO was formed, and its sensing abilities were compared with those of pure SnO nanosphere-based sensors. The Pd-loaded SnO hierarchical nanostructures showed an ultra-sensitive HS detection ability down to 10 ppb, a high dynamic range (4 orders of magnitude) up to 200 ppm, and a low working temperature (150 °C). Thus, this micro gas sensor based on Pd-loaded SnO hierarchical nanostructures has promising applications in universal HS detection. The fabrication method presented herein is simple, renewable and operable and thus may be extended to synthesize other types of metal oxide-based semiconductor micro sensors for application in various fields.
在此，通过使用分级负载钯的二氧化锡纳米结构作为传感材料，实现了一种高动态范围的硫化氢微气体传感器。采用水热法在无任何表面活性剂或模板的情况下合成了二氧化锡纳米球，随后通过一种简便方法进行钯纳米颗粒修饰。形成了负载钯的二氧化锡分级纳米结构，并将其传感能力与基于纯二氧化锡纳米球的传感器进行了比较。负载钯的二氧化锡分级纳米结构显示出低至10 ppb的超灵敏硫化氢检测能力、高达200 ppm的高动态范围（4个数量级）以及150 °C的低工作温度。因此，这种基于负载钯的二氧化锡分级纳米结构的微气体传感器在通用硫化氢检测中具有广阔的应用前景。本文提出的制造方法简单、可再生且可操作，因此可扩展用于合成其他类型的基于金属氧化物的半导体微传感器，以应用于各个领域。
