期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 234, 期 -, 页码 80-83出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2016.04.153
关键词
MoS2 nanoflowers; Solid contact; Ion-selective electrodes; Potentiometry; Potassium
资金
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDA11020702]
- National Natural Science Foundation of China [21475148]
- Taishan Scholar Program of Shandong Province
Three-dimensional (3D) molybdenum sulfide (MoS2) nanoflowers have been synthesized via a novel hydrothermal method and applied as ion-to-electron transducer for solid-contact ion-selective electrodes (SC-ISEs). The morphology and elemental composition of the prepared nanomaterials have been characterized. The performance of the developed K+-SC-ISE has been demonstrated by determining K+ in solution with a polymeric membrane containing valinomycin as the ionophore. A Nernstian slope of 55.8 mV/decade with a detection limit of 10(-5.5) M can be obtained. Using the 3D flowerlike MoS2 as solid contact, the fabricated K+-SC-ISE exhibits a smaller impedance and more stable potential response than the coated-wire electrode. In addition, the novel SC-ISE behaves well in the water layer test and shows good resistance to interferences from light, O-2 and CO2. It is believed that the 3D MoS2 nanoflowers can be a good alternative as solid contact in SC-ISEs. (C) 2016 Elsevier B.V. All rights reserved.
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