Preparation and properties of bisphenol A sensor based on multiwalled carbon nanotubes/Li<inf>4</inf>Ti<inf>5</inf>O<inf>12</inf>-modified electrode

• Key Words:Multiwalled carbon nanotubes (MWCN);Composite materials - Electrochemical sensors - Glass - Glass membrane electrodes - Infrared spectroscopy - Lithium compounds - Phenols - Scanning electron microscopy - Titanium compounds - Yarn;Adsorption properties - Bis-phenol a - Electrochemical performance - Glassy carbon electrodes - Large specific surface areas - Lithium titanate - Morphology and structures - Multiwalled Carbon Nanotube (MWCNT)
• Abstract:A new electrochemical sensor based on the multiwalled carbon nanotube (MWCNT)/Li<inf>4</inf>Ti<inf>5</inf>O<inf>12</inf>-modified glassy carbon electrode for determination of bisphenol A (BPA) was developed by modifying the surface of a glassy carbon electrode with the prepared composite Li<inf>4</inf>Ti<inf>5</inf>O<inf>12</inf>/MWCNTs. The morphology and structure of the composite were characterized by infrared spectroscopy and scanning electron microscope. The obtained electrochemical sensor Li<inf>4</inf>Ti<inf>5</inf>O<inf>12</inf>/MWCNTs/GCE takes advantages of large specific surface area of the Li<inf>4</inf>Ti<inf>5</inf>O<inf>12</inf>nanostructure, excellent adsorption properties, and electrochemical properties of MWCNTs. Under optimal conditions, the response of the proposed sensor to BPA was linear in the BPA concentration range from 1.0 × 10⁻⁷to 1.0 × 10⁻⁵ mol L⁻¹and the detection limit was of 7.8 × 10⁻⁸ mol L⁻¹according to the 3σ rule. The results revealed that the newly developed sensor exhibited high sensitivity and selectivity, excellent electrochemical performance, and fast response to BPA, allowing it to be used for the detection of BPA in actual samples.<br/> © 2014, Springer-Verlag Berlin Heidelberg.
• Volume:21
• Issue:3
• Translation or Not:no