期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 298, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2019.126861
关键词
Metal organic framework; 4-Nitrophenol; Sensor; Electrochemical detection; Reduction
资金
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning [NRF-2017R1A4A1015533, NRF-2017R1D1A1B03036303]
In this study, we utilized functionalized metal organic frameworks (MOFs) as a host matrix to embed silver and palladium (AgPd) bimetallic nanoparticles. The physicochemical properties of the as-synthesized materials were characterized Via UV, FT-IR, XRD, SEM, TEM, XPS, BET and TGA analysis. The as-synthesized materials presented excellent activities toward the electrochemical detection of 4-nitrophenol and its reduction by NaBH4 under ambient conditions. The constructed sensor displayed selective and sensitive determination of 4-NP in the linear concentration range 100-370 mu M with a limit of detection of Sigma 32 nM. Moreover, because of its high specific surface area, high conductivity, and fast charge transfer ability, the sensor displayed good electrocatalytic activity. Moreover, it exhibited excellent selectivity toward 4-NP in the presence of common interfering species. The synthesized catalyst exhibited good catalytic activity for the reduction of 4-NP. It was reusable for five consecutive cycles without a significant loss in its catalytic activity. The applicability of the constructed sensor was explored via the detection of 4-NP in tap water samples at a recovery of similar to 100.97%.
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