Enhanced activity and reusability of TiO2 loaded magnetic activated carbon for solar photocatalytic ozonation

Synthesis, Characterization and Enhanced Photocatalytic Activity of Iron Oxide/Carbon Nanotube/Ag-doped TiO2 Nanocomposites

“…28,29 Regarding the diffractogram of iron oxide (Figure 1b), characteristic peaks of magnetite and maghemite are observed, being indistinguishable by XRD. 30 The main peaks of magnetite-maghemite were observed at 30.10°, 35.50°, 43.10°, 53.40°, 57.04° and 62.88°, representing the diffraction planes (220), (311), (400), (422), (511) and (440), respectively. [31][32][33] The diffractogram in Figure 1c shows the main peaks for TiO 2 .…”

Organic pollutants removal in wastewater by heterogeneous photocatalytic ozonation

“…Rey et al (2012) and Quiñones et al (2014) discovered that the pollutant depletion followed a pseudo-first order kinetics when photocatalysis and ozonation was combined. Li et al (2003) reported that the TOC removal in photolytic ozonation obeyed a pseudo-zero order kinetics dependent upon ozone concentration.…”

“…Rey et al (2012) and Quiñones et al (2014) deposited anatase TiO 2 particles on a commercial magnetic meso-to-microporous activated carbon support (TiFeC) by a sol-gel method. TiFeC was not as effective as Degussa P25, but the easily magnetical separation, excellent stability (low Fe and Ti losses) and reusability made it an interesting alternative material for solar photocatalytic ozonation.…”

“…Photocatalytic ozonation experiments were typically carried out in a batch (Kopf et al, 2000; Beltrán et al, 2005; Li et al, 2005) or semi-batch mode (Beltrán et al, 2010; Rey et al, 2012; Quiñones et al, 2014) using a cylindrical(Kopf et al, 2000;Moraes et al, 2000;Li et al, 2005;Quiñones et al, 2014) or tubular glass reactor…”

Solar photocatalytic ozonation of emerging contaminants detected in municipal wastewater treatment plant effluents by magnetic MWCNTs/TiO2 nanocomposites

“…23,24 Photocatalytic ozonation greatly improved the mineralization rate compared to ozonation or photocatalytic oxidation alone, which suggests the existence of some kind of synergism between photocatalytic oxidation and ozonation. First, in the photocatalytic ozonation process, part of ozone can be transformed into hydroxyl radicals (cOH) by the action of MWCNTs, 25,26,29,36 TiO 2 (ref. 36 and 37) and iron oxides.…”