Iterative Synthesis of Inulin-Type Fructooligosaccharides Enabled by Stereoselective β-d-Fructofuranosylation.

Inulin-type fructooligosaccharides (FOSs) constitute an abundant subgroup of fructans with important biological activities. However, the availability of individual fructooligosaccharides with an accurate structure in high purity and quality remains challenging. We herein report the first iterative synthesis of five inulin-type FOSs with degrees of polymerization ranging from 3 to 7 via highly stereoselective β-(2 → 1)-d-fructofuranosylation on a gram scale.

Enhanced visible light photocatalytic activity of FeO modified TiO prepared by atomic layer deposition.

In this work, commercial anatase TiO powders were modified using ultrathin FeO layer by atomic layer deposition (ALD). The ultrathin FeO coating having small bandgap of 2.20 eV can increase the visible light absorption of TiO supports, at the meantime, FeO/TiO heterojunction can effectively improve the lifetime of photogenerated electron-hole pairs.

TiON Modified TiO Powders Prepared by Plasma Enhanced Atomic Layer Deposition for Highly Visible Light Photocatalysis.

In this work, TiN film deposited by plasma enhanced atomic layer deposition (PEALD) is adopted to modify the commercial anatase TiO powders. A series of analyses indicate that the surface modification of 20, 50 and 100 cycles of TiN by PEALD does not change the morphology, crystal size, lattice parameters, and surface area of TiO nano powders, but forms an ultrathin amorphous layer of nitrogen doped TiO (TiON) on the powder surfaces. This ultrathin TiON can facilitate the absorption of TiO in visible light spectrum.

Visible Light-Driven Photocatalytic Performance of N-Doped ZnO/g-CN Nanocomposites.

N-doped ZnO/g-CN composites have been successfully prepared via a facile and cost-effective sol-gel method. The nanocomposites were systematically characterized by XRD, FE-SEM, HRTEM, FT-IR, XPS, and UV-vis DRS. The results indicated that compared with the pure N-doped ZnO, the absorption edge of binary N-doped ZnO/g-CN shifted to a lower energy with increasing the visible-light absorption and improving the charge separation efficiency, which would enhance its photocatalytic activity.

Photocatalytic Properties of CoO-Coated TiO Powders Prepared by Plasma-Enhanced Atomic Layer Deposition.

CoO-coated commercial TiO powders (P25) p-n junction photocatalysts were prepared by plasma-enhanced atomic layer deposition (PEALD) technique. The structure, morphology, bandgap, and photocatalytic properties under ultraviolet light were investigated systematically. Although the deposition of CoO does not change the anatase structure and crystallite size of P25 powders, the ultraviolet photocatalytic activity has been improved evidently.