Synthesis and Characterization of CNT / TiO₂Photoelectrocatalytic Electrodes for Methlene Blue Degradation

Abstract

In this study, two series of CNT/TiO 2 electrodes were prepared. The decrease of surface area compared with that of the pristine carbon nanotubes (CNTs) indicated the blocking of micropores on the surface of the CNTs; was further supported by scanning electron microscopy (SEM) and field emission SEM (FE-SEM) observations. The X-ray diffraction (XRD) results showed that the CNT/TiO particles. The energy dispersive X-ray spectroscopy (EDX) spectra showed the presence of C, O and Ti peaks for all samples. It was found that catalytic decomposition of methylene blue (MB) solution could be attributed to synthetic effects between the TiO 2 photocatalysis and electro-assisted CNTs network, and that photoelectrocatalytic oxidation increased with an increase of CNT composition. It was also found that the photoelectrocatalytic oxidation efficiency for MB is higher than that of photocatalytic oxidation. Moreover, the CNT/TiO 2 composites catalyst prepared by the impregnation method demonstrates higher photoelectrocatalytic activity than the mechanical mixture with the same CNT content.

The Photocatalytic Decomposition of Different Organic Dyes under UV Irradiation with and without H2O2on Fe-ACF/TiO2Photocatalysts

“…The similar phenomena were also observed inprevious studies. 39,40) The SEM micrographs of ACF/TiO 2 and Fe-ACF/TiO 2 composites are shown in Fig. 1.…”

Synthesis and characterization of V–C60/TiO2 photocatalysts designed for degradation of methylene blue

“…TiO 2 composites [21,22] showed an excellent photoactivity. Fullerenes (C 60 ) are a well-known carbon product for their unique electronic properties including high electron affinity [23][24][25].…”

Photocatalytic activity of Fe treated AC/TiO2composites between visible light and UV light irradiation

“…However, the ion implantation is quite expensive and possible only in the high crystalline TiO2. Metal elements doping is one of the typical approaches to extend the spectral response of the titanium dioxide to visible-light region by providing defect states in the band gap [14]. Some metal elements such as Fe, Cu, Mn, Cr and Ni have been employed to tune the electronic structure and enhance the photocatalytic activity of the titanium dioxide [15].…”