Abstract
L-Lactate acid (L-LA) is an important organic biomolecule and exists in human sweat thus making direct detection by current techniques challenging. It is thus important to develop a non-enzymatic l-LA sensor with high sensitivity and low cost. Herein, multidimensional mutli-walled carbon nanotube nanocomposites (Co3O4/CuO@MWCNTs NCs) incorporated with copper and cobalt oxide are prepared on nickel foam (NF, Surface area = 1 cm2) hydrothermally for l-LA detection. The Co3O4/CuO@MWCNTs NCs are analyzed by powder X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and Ultraviolet–visiblespectroscopy (UV–VIS). Experimental results show that as an enzyme-free l-LA sensor, the Co3O4/CuO@MWCNTs NCs constitute a simple and low-cost detector to monitor l-LA in human sweat and the materials which yield high sensitivity and selectivity have broad prospects in the medical and health fields.
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