Synthesis of anatase TiO2 nanocrystals with {101}, {001} or {010} single facets of 90% level exposure and liquid-phase photocatalytic reduction and oxidation activity orders

Photocatalytic properties of titania thin films prepared by sputtering versus evaporation and aging of induced oxygen vacancy defects

“…Another distinctive plane is (1 0 5). Both facets {0 0 1} and {1 0 5} are reported to be more reactive than {1 0 1} in literature, with {0 0 1} proving to be the most reactive facets due to their high surface energy, which leads to efficient oxidation of contaminant species [27,30,31]. In contrast {1 0 1} facets have such low surface energy that reduction preferably happens there.…”

Synthesis and improved photocatalytic activity of ultrathin TiO2 nanosheets with nearly 100% exposed (001) facets

“…Yang et al [29] reported the synthesis of uniform anatase TiO 2 single crystals with 47% (001) facets using TiF 4 aqueous solution and HF as the precursor and the structure-directing agent, TiO 2 single crystals were obtained with an average diameter of 1.6 μm. Over the past few years, different synthetic methods have been employed to produce TiO 2 crystals with different facets [30][31][32][33][34][35][36][37][38][39]. Although the role of HF is suggested to be one of the determining factors for the generation of exposed (001) facets, to the best of our knowledge, the synthesis of uniform TiO 2 nanomaterials with a higher percentage of (001) facets still remains a major challenge.…”

Enhanced photocatalytic activity of {101}-oriented bipyramidal TiO2 agglomerates through interparticle charge transfer

“…Furthermore, the bipyramidal shape enhances the electron transfer between primary particles by increasing the contact area. Secondly, the exposed {1 0 1} facets on the bipyramidal TiO 2 further reduce the recombination rate because the photo-generated electrons are preferentially accumulated at the {1 0 1} facets with retarding the recombination rate [30,31]. Finally, the high crystallinity of bipyramidal particles with fewer defect sites can minimize the defect-induced recombination.…”

“…Several studies have reported that the hierarchically structured (HS) TiO 2 improves the photocatalytic activity because the active facets such as {1 0 1} and {0 0 1} can be selectively exposed [30,31]. However, the agglomeration effect on efficient interparticle charge transfer in the HS TiO 2 has not been studied yet.…”