Preparation of platinum/carbon nanotube in aqueous solution by femtosecond laser for non-enzymatic glucose determination

Multiwalled carbon nanotubes (MWCNTs) supported platinum (Pt) nanoparticles were fabricated in aqueous solution without reducing agents by femtosecond laser. The surface morphological, compositional, and structural characterizations of the prepared Pt/MWCNT were examined using scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and X-ray diffraction. The results showed that the Pt nanoparticles with about 5–10 nm in diameter were well dispersed on the surface of MWCNTs. Cyclic voltammetry was employed to investigate the electrocatalytic activity toward the electrooxidation of glucose in alkaline solution at the Pt/MWCNT. The Pt/MWCNT modified glassy carbon electrode displayed high electrocatalytic ability for the direct electrochemical oxidation of glucose in alkaline solution. At an applied potential of −0.25 V vs. Ag/AgCl 3 M KCl, the Pt/MWCNT modified electrode exhibited a sensitivity of 0.106 A M−1 cm−2 with a linear range up to 2.4 mM. This proposed glucose sensor also showed good abilities of anti-interference to acetaminophen, uric acid, fructose, and ascorbic acid.