SrNb2O6 nanotubes with enhanced photocatalytic activity

Nano‐photocatalytic Materials: Possibilities and Challenges

“…One‐dimensional (1D) nanostructures such as wires, belts and tubes have attracted considerable attention for photocatalytic applications due to their distinct electronic, optical and chemical properties, which differ from their bulk counterparts 134–137. These properties are dependent on the size and morphology of the materials, leading to the development of strategies to optimize the photocatalytic reactivity.…”

Hydrothermal synthesis of bamboo-shaped nanosheet KNb3O8 with enhanced photocatalytic activity

“…That is, a higher specific surface area has a positive effect on the improvement of the photocatalytic activity. In addition, the thickness of the nanosheet KNb 3 O 8 is less than 50 nm, thus, it can be considered that the migration of the charge carriers from the bulk regions to the surface with active sites should be more effective in the nanosheet KNb 3 O 8 than in the rod-like KNb 3 O 8 due to a thickness of >200 nm [29]. Generally, as compared with the bulk material, the nano-sized photocatalysts have some advantages, which include shortened carrier collection pathways, improved light distribution, as well as quantum size confinement [30].…”

Preparation and Physical and Photocatalytic Activity of a New Niobate Oxide Material Containing NbO4 Tetrahedra

“…The correlation between the Raman wavenumbers for the stretching bands in niobate compounds and the Nb-O bond length has previously been established. We calculated the Nb-O bond length using the empirical equation ν/cm −1 = 29522 × exp −1 9168R , where ν is the Nb-O stretching wavenumber, and R is the Nb-O bond length [13,27]. The results are shown in Figure 2(b), and all of the Nb-O length satisfied the requirement of Nb-O bond length in NbO 4 tetrahedron of 1.83-1.93 Ǻ, indicating that all the samples contain NbO 4 tetrahedron [1].…”

“…Those early studies suggested a potential way to improve the catalytic activity via tuning the shape of MO x . The above hypothesis is rarely investigated in niobates, which is one kind of photocatalyst for water splitting and organic degradation, such as NaNbO 3 , SrNb 2 O 6 , and Cs 2 Nb 4 O 11 [8][9][10][11][12][13][14][15]. Most of the niobate photocatalysts contain NbO 6 octahedra.…”