Photocatalytic activities of microcrystalline titania incorporated in sheet silicates of clay

Abstract

Surfynol 465 solutions with both types of solvents and obtained the values of R in D20 and H20 at 2.4 and 2.5 nm, respectively,26 which shows no significant difference as described above. To elucidate further the variation of R, which seems to depend on the kind of measurement, we are now preparing the NMR relaxation and thermodynamic measurements of Surfynol 465 and

Thermal behaviour of titanium in host matrix clay

“…The thermal treatment at 500 °C preserved the BET surface for TiT-E (120 m 2 .g -1 ) and an increase was observed for montmorillonites treated with Ti and glycerol, TiG-E5 and TiG-AE5 samples that reached 139 and 193 m 2 .g -1 , respectively. The total volume of the montmorillonite, 0.117 cm 3 .g -1 (at P/Po = 0.983), in general, also increased after treatment (Table 4). After thermal treatment at 500 °C of the Ti-montmorillonites values duplicated from 0.083 to 0.159 cm 3 .g -1 for TiG-E and from 0.122 to 0.237 cm3.g -1 for TiG-AE, respectively, except for TiT-E that only increased a third, from 0.150 to 0.194 cm 3 .g -1 .…”

“…The total volume of the montmorillonite, 0.117 cm 3 .g -1 (at P/Po = 0.983), in general, also increased after treatment (Table 4). After thermal treatment at 500 °C of the Ti-montmorillonites values duplicated from 0.083 to 0.159 cm 3 .g -1 for TiG-E and from 0.122 to 0.237 cm3.g -1 for TiG-AE, respectively, except for TiT-E that only increased a third, from 0.150 to 0.194 cm 3 .g -1 . The micropore volumes (Vmic) obtained by the high-pressure branch extrapolated to the adsorption axis in t-plots 24 are shown in Table 4.…”

“…The titanium in a host matrix solid can be used in appropriate applications: for example, photocatalytic properties can be improved by using TiO 2 [2] as a pillar in clay 3 , and visible light photocatalytic activity 4 could be improved by preparing mesoporous carbon-doped TiO 2 . Studies related to titanium-clay were started around 20 year ago by Sterte 5 , thereafter solids were analyzed for catalytic uses: butanol hydroxylation 6 , hydroxylation of phenol 7 , dehydration of pentanol 8 ; decomposition of propanol 9 , selective catalytic reduction of NO by Ti-pillared clays 10,11 .…”

The Effect of Mesoporous Carbon Nitride Modification by Titanium Oxide Nanoparticles on Photocatalytic Degradation of 1,3-Dinitrobenzene

“…3) Overpowering charge recombination; the carbon nitride surface can act as an acceptor of the photo-generated electrons for titanium dioxide particles and confirm a fast charge moving in view of its great conductivity, and therefore, an effective charge separation can be attained. 22,23 The better charge transportation would provide more photo-induced carriers for the associated photocatalytic reactions, due to a higher photocatalytic activity.…”

The Dual-frequency (20/40 kHz) Ultrasound Assisted Photocatalysis with the Active Carbon Fiber-loaded Fe3+-TiO2as Photocatalyst for Degradation of Organic Dye

“…-TiO 2 /ACF photocatalysts can be estimated with an equation described by Yoneyama et al 22 that plotting (αhγ) 2 versus hγ (inset in Figure 4), where hγ is photon energy and α is the absorption coefficient calculated according to the Kubelka-Munk method. 23 The intercept of the tangent to the plot is capable of giving a good approximation of the band gap energy for the fore-mentioned photo- catalyst.…”