2 research outputs found
β‑SnWO<sub>4</sub> Photocatalyst with Controlled Morphological Transition of Cubes to Spikecubes
A distinct morphology of β-SnWO<sub>4</sub> with hierarchically
multiarmed architecture and overall hexahedral symmetry – entitled
as spikecube – is fabricated for the first time via a polyol-mediated
synthesis. The growth of the β-SnWO<sub>4</sub> spikecubes is
investigated and attributed to thermodynamic and kinetic control.
In a sequential reaction, crystalline cubes of β-SnWO<sub>4</sub> enclosed by {100} facets grow in a first Ostwald ripening-based
step. A kinetically controlled growth process to spikecubes follows
under formation of multiarmed spikes on the facets of the cubic seeds.
Such a growth process differs significantly from the literature concerning
highly branched crystals. The synergistic effect of morphological
modification (i.e., introducing more surface reaction sites) and textural
alteration (i.e., incorporation of the <i>p</i>-block Sn<sup>2+</sup> into simple tungsten oxide to reframe its band structure)
leads to an enhanced photocatalytic activity of the β-SnWO<sub>4</sub> spikecubes being 150% higher in comparison to benchmark WO<sub>3</sub> photocatalysts
β‑SnWO<sub>4</sub> Photocatalyst with Controlled Morphological Transition of Cubes to Spikecubes
A distinct morphology of β-SnWO<sub>4</sub> with hierarchically
multiarmed architecture and overall hexahedral symmetry – entitled
as spikecube – is fabricated for the first time via a polyol-mediated
synthesis. The growth of the β-SnWO<sub>4</sub> spikecubes is
investigated and attributed to thermodynamic and kinetic control.
In a sequential reaction, crystalline cubes of β-SnWO<sub>4</sub> enclosed by {100} facets grow in a first Ostwald ripening-based
step. A kinetically controlled growth process to spikecubes follows
under formation of multiarmed spikes on the facets of the cubic seeds.
Such a growth process differs significantly from the literature concerning
highly branched crystals. The synergistic effect of morphological
modification (i.e., introducing more surface reaction sites) and textural
alteration (i.e., incorporation of the <i>p</i>-block Sn<sup>2+</sup> into simple tungsten oxide to reframe its band structure)
leads to an enhanced photocatalytic activity of the β-SnWO<sub>4</sub> spikecubes being 150% higher in comparison to benchmark WO<sub>3</sub> photocatalysts