Study on adsorption behavior of P-nitrophenolon carbon nanotubes

Due to its high specific surface area, carbon nanotubes (CNTs) have strongly adsorpting property. The thermodynamics properties and mechanism were studied for adsorpting P-nitrophenol in aqueous solution with carbon nanotubes. Purification and adsorption sample are tested by Transmission Electron Microscope and Fourierit-Infared Spetroscopy. The effects of concentration and temperature on the adsorption are discussed. The results show that the adsorption of P-nitrophenol in aqueous solution is accorded with Freundlich and Langmuir equations. Adsorption is increased with concentration and reduced with temperature. Freundlich equation is suiteder to describing the adsorpting reaction. The adsorption for P-nitrophenol on CNTs is proved to be a spontaneous, exothermal process with increasing entropy and is physical adsorption.