Anatase TiO2 single crystals with dominant {0 0 1} facets: Synthesis, shape-control mechanism and photocatalytic activity

Highly stable defective TiO2-x with tuned exposed facets induced by fluorine: Impact of surface and bulk properties on selective UV/visible alcohol photo-oxidation

“…The most important parameters which influence the photoactivity were the amount of OH radicals and the formation of defects. The percentage of the {0 0 1} facet seems to be not very relevant, differently from what reported in many papers [36,39,44,46,47], probably due to the different experimental conditions under which the photocatalysts were prepared. The stable blue colour of the powders suggests that the Ti 3+ species are located in the bulk and they can migrate to the surface giving rise to energetically favoured sites.…”

“…In particular, the use of capping agents during the TiO 2 crystallization may be exploited as a way to favour one facet with respect to another, by changing its surface energy and the stability [34,40]. As Yang et al [33] showed that fluorine adsorption on anatase surface reversed the relative stability of the {1 0 1} and {0 0 1} facets, hydroflu oridric acid has been the most used controlling agent [35,36,[41][42][43][44][45][46][47][48][49]. Despite the high number of papers published on this topic, the actual role played in photocatalytic reactions by fluorine present during TiO 2 preparation and/or as a residual species on the photocatalyst surface is not completely clear.…”

Single-Facet Dominant Anatase TiO2 (101) and (001) Model Catalysts to Elucidate the Active Sites for Alkanol Dehydration

“…Their results showed that the (101)-dominant catalysts exhibited higher catalytic activity per unit weight than (001)-dominant catalysts for the photocatalytic evolution of H 2 from H 2 O. In other applications, such as the photochemical degradation of organic contaminants, TiO 2 (001) facets have been reported to be more efficient than TiO 2 (101) facets, plausibly because of their higher surface energy. − Most of the applications to date have focused on the single facet anatase model catalysts for photocatalytic reactions, but some previous studies examined the use of these model catalysts for thermocatalytic reactions. , …”

Designing efficient TiO2-based photoelectrocatalysis systems for chemical engineering and sensing

“…Many synthesis methods including hydrothermal or solvothermal routes, crystallization transformation, oxidation from Ti metal and epitaxial growth, have been used to synthesize TiO2 particles with different facets exposed (see Fig. 11a) [84][85][86][87] .…”