A biomimetic sensor based on specific receptor ETBD and Fe3O4@Au/MoS2/GN for signal enhancement shows highly selective electrochemical response to ultra-trace lead (II)
| Autor: | Wei Yin, Jing Nie, Danqun Huo, Huanbao Fa, Bin He, Fang-mei Liu, Tian-ci Xia, Changjun Hou, Yu-nan Qin |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Detection limit
Materials science Nanocomposite Stereochemistry Ligand Substrate (chemistry) 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry 01 natural sciences Combinatorial chemistry 0104 chemical sciences Electrochemical gas sensor Nanomaterials Molecule General Materials Science Electrical and Electronic Engineering 0210 nano-technology |
| Zdroj: | Journal of Solid State Electrochemistry. 21:3257-3268 |
| ISSN: | 1433-0768 1432-8488 |
| DOI: | 10.1007/s10008-017-3659-3 |
| Popis: | A lead-chelating ligand, 2,2′-((1E)-((4-((2-mercaptoethyl)thio)-1,2phenylene)bis(azany-lylidene))bis(methanylylide-ne))diphenol (ETBD), was immobilized on a nanocomposite Fe3O4@Au/MoS2/GN possessing a large surface area to produce a biomimetic sensor. The ETBD molecules act as specific receptor binding sites for Pb2+, resulting in the highly selective Pb2+ response by square wave voltammetry (SWV). In order to obtain highly sensitive analysis, MoS2/GN was utilized as a substrate material, which enhances sensing performance and provides sites for Fe3O4@Au, and the core–shell Fe3O4@Au can interconnect and produce conductivity between the recognition element and nanomaterials. Due to the integration of the properties of Fe3O4@Au, MoS2/GN and ETBD, the proposed biomimetic electrochemical sensor exhibits a wide linear response range from 4 × 10−14 to 2 × 10−8 mol/L with a low detection limit of 3.38 × 10−14 mol/L, which shows great promise for the determination of ultra-trace Pb2+ in real samples. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink