High-Efficiency Degradation Sugar Wastewater by Co-TiO2 Nanotube Arrays

Abstract

This work presents a novel approach for preparing TiO2 nanotube arrays loaded with highly dispersed Co nanoparticles through an ultrasound aided photochemical route. The Co content doped on the arrays was controlled by changing the concentration of Co(NO3)2 and the ultrasound time. The Co doped TiO2 nanotube arrays were characterized by SEM, XRD, EDS and UV–Vis spectrum. The photocatalytic activities of TiO2 nanotube arrays electrode were studied. The results showed that Co doping significantly enhanced the photocatalytic degradation rate of TiO2 nanotube arrays under UV-light irradiation. The main factors affected photocatalytic degradation of sugar wastewater such as the illumination time, pH, different concentrations of H2O2 and wastewater with undoped TiO2 nanotube arrays were compared. The results showed that the longer the exposure time, the higher the initial pH of wastewater is more favorable for the Co-TiO2 nanotube arrays, The concentration of H2O2 is 60mmol/L, and compared to undoped TiO2 nanotube arrays Co doped TiO2 nanotube arrays have better photocatalytic properties.