检出限
材料科学
纳米颗粒
电化学气体传感器
电化学
联氨(抗抑郁剂)
化学工程
线性范围
纳米技术
石墨烯
氧化物
碳纤维
电极
色谱法
化学
复合数
复合材料
冶金
物理化学
工程类
作者
Yong Zhang,Ying Zhang,Ding Zhang,Sida Li,Chao Jiang,Yi Su
标识
DOI:10.1016/j.snb.2019.01.105
摘要
Two kinds of usage environments need to be considered for development of hydrazine sensor: the detection of hydrazine in liquid phase and the detection of hydrazine gas in air environment. Here, Au nanoparticles-embedded N-doped porous carbon anchored on reduced graphene oxide ([email protected]) nanosheet has been creatively constructed by a confinement preparation process in the frame structure of zeolitic imidazolate framework-67 (ZIF-67). Such ternary hybrid material exhibits good sensitivity for the detection of harmful hydrazine in liquid/gas phase. First, an electrochemical sensor based on [email protected] modified glassy carbon electrode ([email protected]/GCE) has been established for detection of hydrazine in liquid phase, leading to the linear detection range from 0.05 to 1.00 μM and the detection limit of 9.6 nM. Second, a practical electrochemical gas sensor based on [email protected] has been assembled for the detection of hydrazine gas in air environment. Such gas sensor shows the detection limit of 1.8 ppm with fast response/recovery. Those advantages of the electrochemical sensors based on [email protected] can be attributed to the key design element of sensing material with structural and compositional advantages leading to the synergy of AuNPs, NPC and rGO.
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