Journal
ELECTROCHIMICA ACTA
Volume 318, Issue -, Pages 711-719Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2019.06.135
Keywords
Single-walled carbon nanotube; Phosphate pillar[6]arene; Silver nanoparticles; Catalysis; Sensing
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Funding
- Key Natural Science Foundation of Yunnan Province China [2018FA028]
- National Natural Science Foundation of China [21467030]
- Program for Outstand Yong Talents of Yunnan University [2018YDJQ003]
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We developed a green and facile approach for synthesizing Ag@PP6@SWCNT nano-material via in-situ loading silver nanoparticles on the surface of phosphate pillar [6]arene (PP6) functionalized single-walled carbon nanotubes (SWCNT) at room temperature and without using either toxic or organic solvents. Ag nanoparticles (with an average size of 3-4 nm) were uniformly dispersed on the surface of SWCNT via the anchoring effect of PP6. PP6 provided a coordination environment between Ag and -PO32- groups in PP6, and there were the pi-pi interactions between SWCNT and benzene rings of PP6. The obtained hybrid nano-material Ag@PP6@SWCNT was characterized using UV-vis absorption spectrum, transmission electron microscopy (TEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Compared to commercial Pd/C and Ag@SWCNT catalysts, Ag@PP6@SWCNT exhibited higher catalytic activity for 4-nitrophenol (4-NP) reduction and methylene blue (MB) degradation, respectively. Moreover, because of the excellent supramolecular host-guest recognition capability of PP6, a sensitive and convenient electrochemical sensing platform for detecting paraquat (PQ) was constructed, and had potential applications in sensing highly toxic herbicides. (C) 2019 Elsevier Ltd. All rights reserved.
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