Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 536, Issue -, Pages 424-430Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2018.10.076
Keywords
Methyl parathion; Platinum nanoparticles; Zirconia oxide; Porous carbons; Electrochemical sensor
Categories
Funding
- National Natural Science Foundation of China [21505031]
- Natural Science Foundation of Hebei Province [B2016201018, B2018201214]
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Pt nanoparticles immobilized on zirconium oxide (ZrO2) and porous carbons (Pt/ZrO2/PCs) tri-component nanohybrids derived from Pt/ metal-organic frameworks (MOFs) were synthesized. They were prepared by using Pt/MOFs as a template. Additionally, MOFs (UiO-66, a traditional MOFs) were used as ZrO2 and carbon sources without the need of additional precursors. The formation of these composite materials was confirmed through a comprehensive characterization such as transmission electron microscopy, X-ray diffraction, and Fourier transform infrared spectroscopy. The Pt/ZrO2/PCs show strong affinity toward the phosphate group and highly electrocatalytic activity for nitro compound on methyl parathion (MP) molecules. The high performance is owing to the combination of unique electrocatalytic activity of Pt species, excellent conductivity of PCs, and good adsorption properties of ZrO2 crystals for MP. The proposed Pt/ZrO2/PCs tri-component nanocomposite sensor realized the ultrasensitive detection of MP with a wide linear range between 3.8 x 10(-9) and 1.14 x 10(-2) mM and a low limit of detection of 1.45 x 10(-9) mM. Therefore, it can be developed as an effective sensing platform for the detection of MP. (C) 2018 Elsevier Inc. All rights reserved.
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