Room-temperature ammonia gas sensor based on reduced graphene oxide nanocomposites decorated by Ag, Au and Pt nanoparticles
Room-temperature ammonia gas sensor based on reduced graphene oxide nanocomposites decorated by Ag, Au and Pt nanoparticles
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DOI：
10.1016/j.jallcom.2017.06.152
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发表时间：
2017-10-25
影响因子：
6.2
通讯作者：
Acar, Selim
中科院分区：
文献类型：
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作者：
Karaduman, Irmak;Er, Engin;Acar, Selim
我们报道了一种基于金属纳米颗粒-还原氧化石墨烯(RGO)纳米复合材料的新型高灵敏二维(2D)气敏材料，用于氨气检测。采用一步化学还原法制备了银、金、铂纳米颗粒修饰的RGO样品，系统研究了不同金属纳米颗粒对氨气气敏性能的影响。用透射电子显微镜和X射线衍射仪对样品进行了表征。在室温下研究了所制备的传感器对NH3等目标气体的气敏特性。与Au和PtNPs修饰的传感器相比，AgNPs修饰的传感器具有更高的灵敏度、选择性、更好的响应/恢复时间和更高的氨气稳定性。AgNPs-rGO表现出最高的性能，证实了对金属类型的强烈依赖。样品的传感性能增强可以归因于rGO和金属纳米颗粒的优良导电性、所提出的制备方法引起的化学敏化、金属纳米颗粒的催化性能和rGO表面的活性氧物种的综合作用。(C)2017爱思唯尔B.V.保留所有权利。
We report a novel and highly sensitive two-dimensional (2D) gas sensing material based on metal nanoparticles-reduced graphene oxide (rGO) nanocomposite for the detection of ammonia gas. The rGO samples decorated by Ag, Au and Pt nanoparticles (NPs) were successfully synthesized using a singlestep chemical reduction process, and the effect of different metal NPs on the gas sensing performance for ammonia gas were systematically investigated. The samples were characterized by TEM and XRD methods. The gas-sensing properties of the fabricated sensors were investigated for NH3 and other target gases at room temperature. The sensor decorated by AgNPs has higher sensitivity, selectivity, better response/recovery times and great stability to ammonia gas than sensors decorated by Au and Pt NPs. AgNPs-rGO presented the highest performance, confirming a strong dependence on the metal type. The enhanced sensing properties of the samples may be attributed to the combined effect of the superior conductivity of rGO and metal nanoparticles, chemical sensitization caused from proposed production method, catalytic properties of metal nanoparticles and active oxygen species on the rGO surface. (C) 2017 Elsevier B.V. All rights reserved.