Ti-containing volcanic ash as photocatalyst for degradation of phenol

Abstract

Photocatalysis application in effluent decontamination is becoming one of the most promising green chemistry technologies. In this paper, natural volcanic ash particles have been characterized and used either as photocatalysts or as a support for a titania-containing photocatalyst. The natural material alone displayed good photocatalyst behaviour as a consequence of the presence of some titanium compounds in its composition. The original ashes were further loaded with TiO 2 through hydrolysis of TiOSO 4 under hydrothermal conditions. Activity tests of these Ti-loaded materials in the photocatalytic decomposition and elimination of phenol-type organic pollutants in water displayed good activity which makes them candidates to be used as photocatalysts for waste water treatment.

Synthesis of metal-oxide pillared montmorillonite clay for the selective catalytic oxidation of H2S

“…2(A) shows the binding energies of Ti 2p photoelectron peaks at 458.6 and 464.4 eV corresponding to Ti 2p 3/2 and Ti 2p 1/2 lines, respectively, which agrees well with the values reported in the literature [20][21][22][23][24]. The BE of Ti 2p 3/2 at 458.6 eV indicates that the Ti exists in +4 oxidation state in Ti-PILC [14,24]. The BE of Zr 3d 5/2 in Zr-PILC was observed at 182.9 eV (Fig.…”

Supported Photocatalyst for Removal of Emerging Contaminants from Wastewater in a Continuous Packed-Bed Photoreactor Configuration

“…However, TiO2 has an important disadvantage because it is in powder form and, therefore, a post-treatment separation stage is needed for its use as photocatalytic material in wastewater decontamination by photocatalytic treatment [18,19]. This is the main reason why it is very useful to test the possibility of supporting the TiO2 active phase on several materials-e.g., activated carbon, silica, glass and polymers-in order for it to be used as photocatalysts in photocatalytic reactors for wastewater decontamination [20][21][22].…”

Equilibrium and kinetics of adsorption of methylene blue on Ti‐modified volcanic ashes

“…31 The impregnation of these particles with TiO 2 was carried out using a hydrothermal method. 32,33 Five grams of TiO 2 Merck and 25 g of natural VAs were added to a 50 ml of 1.0 M NaOH aqueous solution.…”