Photocatalysis and Hydrogen Evolution of Al- and Zn-Doped TiO2 Nanotubes Fabricated by Atomic Layer Deposition.

摘要: Highly homogeneous Al- and Zn-doped TiO2 nanotubes were fabricated by atomic layer deposition (ALD) via nanolaminated stacks of binary layers TiO2/Al2O3 TiO2/ZnO, respectively. The bilayers alternately deposited on the polycarbonate (PC) membrane template ALD with various cyclic sequences. in a length 20 μm diameter 220 nm obtained after removal PC annealing at 450 °C. effects doping composition photocatalytic photoelectrochemical (PEC) activities investigated. Increasing Al reduced activity due to formation charge recombination sites reduction hydroxide radicals. In contrast, there was an optimal range Zn get enhanced higher PEC efficiency. With ratio 0.01, hydrogen production rate from water splitting 6 times than that commercial P25 TiO2. energy-band diagram determined ultrav...