Effect of triblock copolymers on crystal growth and the photocatalytic activity of anatase TiO₂ single crystals

Abstract

The effects of triblock copolymers (P123 and F127) on the growth of TiO2 crystals were studied. Anatase TiO2 crystals with different morphologies and structures were synthesized by controlling the content and type of triblock copolymer in a solvothermal method.

Adsorption and Mechanism of Glycine on the Anatase with Exposed (001) and (101) Facets

“…However, anatase (TiO 2 ) particles have defects such as low utilization of visible light and easy recombination of photogenerated electrons and holes [30]. With improvements in synthesis technology and further study of the crystal structure of anatase (TiO 2 ), theoretical and experimental studies have shown that anatase (TiO 2 ) with exposed (001) facets has high photocatalytic activity [31]. In general, ordinary anatase is composed of (101) crystal facets with higher surface energy, while (001) crystal facets with higher reactivity are almost non-existent due to their low surface energy.…”

Activation Strategy of WS2 as an Efficient Photocatalytic Hydrogen Evolution Cocatalyst through Co2+ Doping to Adjust the Highly Exposed Active (100) Facet

“…The PET efficiency can be estimated to be 11.6% and 14.2% based on the TRPL results for 7% WS 2 /CZS and 7% (Co–WS 2 )/CZS, respectively (Table S4, Supporting Information). All the analysis demonstrate that the formed Schottky junction can enhance photogenerated electron transfer, and the photogenerated electron transfer rate from CZS to Co–WS 2 was higher and faster than that from CZS to WS 2 , indicating that doping can further reduce the surface energy of (100) crystal plane of Co–WS 2 and accelerate the rate of charge migration to its surface, [ 58 ] which is consistent with the results of Motschottky (M‐S) analysis in Figure 5c.…”

FacileSynthesis of Anatase TiO2Nanocrystals with Co‐Exposed{101}, {010}/{100} and [111]‐Facets for EfficientPhotodegradation of Methylene Blue

“…Truncatedoctahedral bipyramids‐shaped anatase TiO 2 crystals with co‐exposed {001} and {101} facets were prepared througha vapor‐solid reaction growth route by Lee and co‐workers, which showed excellent photocatalytic capability for the degradation of MB [22] . Most recently, in the presence of HCl and HF, anatase TiO 2 crystals with co‐exposed {101} and {001} facets were synthesized by using TiF 4 as titanium source via a solvothermal method by Dong and co‐workers, whichexhibited excellent photocatalytic performance for thedegradation of acid red B, MB, and RB [23] …”

“…[22] Most recently, in the presence of HCl and HF, anatase TiO 2 crystals with co-exposed {101} and {001} facets were synthesized by using TiF 4 as titanium source via a solvothermal method by Dong and co-workers, whichexhibited excellent photocatalytic performance for thedegradation of acid red B, MB, and RB. [23] In this paper, the cuboid-shaped anatase TiO 2 nanocrystals with co-exposed {101} and [111]-facets (or {101} and {100} facets), and diamond-shaped, rod-like and irregular anatase TiO 2 nanocrystalswith dominant exposed {010} facets were synthesized viaa facile sol-gel procedure.The crystal structures, morphologies, light adsorption and photoluminescence, electron transport and recombination properties of the as-prepared anatase TiO 2 nanocrystals were systematically investigated by using XRD, FESEM, TEM, HRTEM, PL spectra, UV-vis diffuse reflectance spectra, and EIS. The specific surface area and porosity of the as-prepared TiO 2 were also analyzed by Barrett-Joyner-Halenda (BJH) method.…”