Characterization and photocatalytic activity of TiO2 supported sepiolite catalysts

ZnO/Sepiolite Catalysts – Characterization and Photoactivity Measurements

“…Figure 3 illustrates the SEM and elemental mapping images of 0.25 M ZnO-SEP. The characteristic fibrous structure of SEP and pseudo-spherical shape of the as-prepared ZnO catalyst were reported previously [17,22]. The heterogeneously dispersed ZnO nanoparticles within the SEP matrix resulted in a different morphology in comparison to the raw SEP and unsupported catalyst.…”

“…The system was found to be extremely sensitive to the amount of rhodium and is an attractive alternative for the elimination of N 2 O traces from stationary sources due to the combination of high catalytic activity with a low pressure drop and optimum textural/mechanical properties. The structural and photoca-talytic properties of TiO 2 -supported sepiolite and sodium ion-treated sepiolite catalysts were also investigated for the degradation of β-naphthol molecule [17]. Sodium chloride treatment enhanced the attraction of sepiolite support through TiO 2 nanoparticles.…”

Preparation and photocatalytic properties of visible light responsive N-doped TiO2/rectorite composites

“…1 exhibit the rutile (1 1 0) peak, no peak of the rutile phase was observed in the XRD pattern of NTR-500 sample. The good thermal stability of the anatase phase in the NTR samples may be due to the stabilizing effect of silica in the rectorite framework [29,30]. The anatase (1 0 1) peak was used for the calculation of the crystal particle size by the Scherrer equation because it had a relatively strong intensity and did not overlap with the other diffraction peaks.…”

Hydrothermal synthesis of porous materials from sepiolite

“…Unlike other 2:1 trioctahedral silicates, it has discontinuities and inversions of the silica sheets that give rise to fine microporous channels of dimensions 0.37 9 1.06 nm [2] running parallel to the length of the fibers and a specific surface area of 300 m 2 /g, about 50% of which within the paralleled pores and the other half in the mesoporosity [3]. As a fibrous natural clay mineral, sepiolite has many advantages, such as abundant storage, low price, good properties, and reutilization, and moreover, it has a brilliant applicative prospect in the industrial fields of adsorption [4,5], rheology [6], and catalysis [7,8], due to its unique microporous structure.…”