|Title:||Hydrothermal Synthesis of Cr<inf>2</inf>Se<inf>3</inf> Hexagons for Sensitive and Low-level Detection of 4-Nitrophenol in Water||Authors:||Chen, Shen Ming
Chen, Tse Wei
Hall, James M.
Tseng, Tien Wen
|Issue Date:||1-Dec-2018||Journal Volume:||8||Journal Issue:||1||Source:||Scientific Reports||Abstract:||
© 2018 The Author(s). We report a simple hydrothermal method used for the synthesis of Cr2Se3 hexagons (h-Cr2Se3) and its application towards electrochemical sensing of 4-nitrophenol (4-NP). The formation of h-Cr2Se3 was confirmed by using scanning electron microscopy, energy dispersive X-ray spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The electrochemical activity of the h-Cr2Se3 modified screen-printed carbon electrode (SPCE) towards 4-NP was studied using cyclic voltammetry (CV) and amperometric i-t techniques. Typically, the obtained results were compared with those for a bare SPCE. The CV result clearly reveals that h-Cr2Se3 modified SPCE has higher catalytic activity towards reduction of 4-NP than bare SPCE. Hence, h-Cr2Se3 modified SPCE was concluded as a viable sensor for sensitive determination of 4-NP. Under optimized conditions, h-Cr2Se3 modified SPCE demonstrates the excellent capacity to detect the 4-NP in a linear range from 0.05 μM to 908.0 μM. The LOD and sensitivity in detection of 4-NP were determined at 0.01 μM and 1.24 μAμM-1 cm-2 respectively. The sensor is highly selective and stable and shows reproducible recovery of 4-NP in domestic supply and river water samples.
|Appears in Collections:||政治學系|
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