Abstract
Herein, we showcase a unique one-step synthetic strategy to obtain a mesoporous assembly of cuboid anatase nanocrystals into hollow spheres that not only offers high surface area but also predominantly tenders the reactive high energy {001} facets. The detailed experimental studies, parameter optimization, and characterizations reveal the crucial role played by the shape and structure directing agents during nucleation and growth. Concentration of F–-ions plays a determining role in stabilizing the size and shape at the initial stage of formation while an optimal balance of SO42– anions is critical in generating the hollow porous assemblies while retaining the morphology of the primary nanocuboid subunits. The single crystalline anatase TiO2 nanocuboids and their hollow spherical assemblies; both show substantial enhancement in photocatalytic and photoelectrochemical activity when compared with commercial P25. Photoelectrodes fabricated using cuboid nanocrystals demonstrate a superior DSSC efficiency when...
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