Hierarchical Branched Mesoporous TiO₂-SnO₂ Nanocomposites with Well-Defined n-n Heterojunctions for Highly Efficient Ethanol Sensing.

ABSTRACT: The direct assembly of functional nanoparticles into a highly crystalline mesoporous semiconductor with oriented configurations is challenging but of significance. Herein, an evaporation induced oriented co-assembly strategy is reported to incorporate SnO₂ nanocrystals (NCs) into a 3D branched mesoporous TiO₂ framework by using poly(ethylene oxide)-block-polystyrene (PEO-b-PS) as the template, SnO₂ NCs as the direct tin source, and titanium butoxide (TBOT) as the titania precursor. Owing to the combined properties of ultrasmall particle size (3-5 nm), excellent dispersibility and presence of abundant hydroxyl groups, SnO₂ NCs can easily interact with PEO block of the template through hydrogen bonding and co-assemble with hydrolyzed TBOT to

SUBMITTER: Zhao T 

PROVIDER: S-EPMC6918105 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature