scholarly journals Atomic Layer Deposition of Mixed-Layered Aurivillius Phase on TiO2 Nanotubes: Synthesis, Characterization and Photoelectrocatalytic Properties

Nanomaterials ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2183 ◽  
Author(s):  
Farid Orudzhev ◽  
Shikhgasan Ramazanov ◽  
Dinara Sobola ◽  
Abdulgalim Isaev ◽  
Chuanyi Wang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Atomic Layer Deposition ◽  
Tio2 Nanotubes ◽  
Photogenerated Electron ◽  
Atomic Layer ◽  
Aurivillius Phases ◽  
Raman Spectroscopic ◽  
Photon Excitation ◽  
Layer Deposition ◽  
Modulated Structures

For the first time, one-dimensional phase-modulated structures consisting of two different layered Aurivillius phases with alternating five and six perovskite-like layers were obtained by atomic layer deposition (ALD) on the surface of TiO2 nanotubes (Nt). It was shown that the use of vertically oriented TiO2 Nt as the substrate and the ALD technology of a two-layer Bi2O3-FeOx sandwich-structure make it possible to obtain a layered structure due to self-organization during annealing. A detailed study by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) showed that the coating is conformal. Raman spectroscopic analysis indicated the structure of the layered Aurivillius phases. Transient photocurrent responses under Ultraviolet–Visible (UV-Vis) light irradiation show that the ALD coating benefits the efficiency of photon excitation of electrons. The results of the photoelectrocatalytic experiments (PEC) with methyl orange degradation as a model demonstrate the significant potential of the synthesized structure as a photocatalyst. Photoluminescent measurement showed a decrease in the probability of recombination of photogenerated electron–hole pairs for ALD-coated TiO2 Nt, which demonstrates the high potential of these structures for use in photocatalytic and photoelectrochemical applications.

scholarly journals Atomic Layer Deposition of Lithium–Nickel–Silicon Oxide Cathode Material for Thin-Film Lithium-Ion Batteries

Energies ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2345
Author(s):  
Maxim Maximov ◽  
Denis Nazarov ◽  
Aleksander Rumyantsev ◽  
Yury Koshtyal ◽  
Ilya Ezhov ◽  
...  
Keyword(s):  
Thin Film ◽  
Electron Microscopy ◽  
Atomic Layer Deposition ◽  
Lithium Ion Batteries ◽  
Silicon Oxide ◽  
Lithium Ion ◽  
Atomic Layer ◽  
X Ray ◽  
Layer Deposition ◽  
Nickel Silicon

Lithium nickelate (LiNiO2) and materials based on it are attractive positive electrode materials for lithium-ion batteries, owing to their large capacity. In this paper, the results of atomic layer deposition (ALD) of lithium–nickel–silicon oxide thin films using lithium hexamethyldisilazide (LiHMDS) and bis(cyclopentadienyl) nickel (II) (NiCp2) as precursors and remote oxygen plasma as a counter-reagent are reported. Two approaches were studied: ALD using supercycles and ALD of the multilayered structure of lithium oxide, lithium nickel oxide, and nickel oxides followed by annealing. The prepared films were studied by scanning electron microscopy, spectral ellipsometry, X-ray diffraction, X-ray reflectivity, X-ray photoelectron spectroscopy, time-of-flight secondary ion mass spectrometry, energy-dispersive X-ray spectroscopy, transmission electron microscopy, and selected-area electron diffraction. The pulse ratio of LiHMDS/Ni(Cp)2 precursors in one supercycle ranged from 1/1 to 1/10. Silicon was observed in the deposited films, and after annealing, crystalline Li2SiO3 and Li2Si2O5 were formed at 800 °C. Annealing of the multilayered sample caused the partial formation of LiNiO2. The obtained cathode materials possessed electrochemical activity comparable with the results for other thin-film cathodes.

scholarly journals Spaced TiO2 Nanotubes Enable Optimized Pt Atomic Layer Deposition for Efficient Photocatalytic H2 Generation

ChemistryOpen ◽  
2018 ◽  
Vol 7 (10) ◽  
pp. 797-802 ◽  
Author(s):  
Selda Ozkan ◽  
JeongEun Yoo ◽  
Nhat Truong Nguyen ◽  
Shiva Mohajernia ◽  
Raul Zazpe ◽  
...  
Keyword(s):  
Atomic Layer Deposition ◽  
Tio2 Nanotubes ◽  
Atomic Layer ◽  
H2 Generation ◽  
Layer Deposition ◽  
Photocatalytic H2 Generation

scholarly journals Enhancement of Pd Catalytic Activity toward Ethanol Electrooxidation by Atomic Layer Deposition of SnO2 onto TiO2 Nanotubes

2017 ◽  
Vol 121 (33) ◽  
pp. 17727-17736 ◽  
Author(s):  
Maïssa K. S. Barr ◽  
Loïc Assaud ◽  
Nicolas Brazeau ◽  
Margrit Hanbücken ◽  
Spyridon Ntais ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Atomic Layer Deposition ◽  
Tio2 Nanotubes ◽  
Atomic Layer ◽  
Ethanol Electrooxidation ◽  
Layer Deposition

Optimal sidewall functionalization for the growth of ultrathin TiO2 nanotubes via atomic layer deposition

2017 ◽  
Vol 53 (3) ◽  
pp. 2005-2015 ◽  
Author(s):  
D. Dominguez ◽  
H. A. Borbón-Nuñez ◽  
J. M. Romo-Herrera ◽  
F. Muñoz-Muñoz ◽  
E. A. Reynoso-Soto ◽  
...  
Keyword(s):  
Atomic Layer Deposition ◽  
Tio2 Nanotubes ◽  
Atomic Layer ◽  
Layer Deposition

Electron Microscopy Observation of TiO2Nanocrystal Evolution in High-Temperature Atomic Layer Deposition

Nano Letters ◽  
2013 ◽  
Vol 13 (11) ◽  
pp. 5727-5734 ◽  
Author(s):  
Jian Shi ◽  
Zhaodong Li ◽  
Alexander Kvit ◽  
Sergiy Krylyuk ◽  
Albert V. Davydov ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
High Temperature ◽  
Atomic Layer Deposition ◽  
Atomic Layer ◽  
Microscopy Observation ◽  
Electron Microscopy Observation ◽  
Layer Deposition

scholarly journals Photocatalytic Crystalline and Amorphous TiO2 Nanotubes Prepared by Electrospinning and Atomic Layer Deposition

Molecules ◽  
2021 ◽  
Vol 26 (19) ◽  
pp. 5917
Author(s):  
Orsolya Kéri ◽  
Eszter Kocsis ◽  
Dániel Attila Karajz ◽  
Zsombor Kristóf Nagy ◽  
Bence Parditka ◽  
...  
Keyword(s):  
Atomic Layer Deposition ◽  
Tio2 Nanotubes ◽  
Photocatalytic Performance ◽  
Uv Light ◽  
Atomic Layer ◽  
Poly Vinyl Alcohol ◽  
Tio2 Nanofibers ◽  
Layer Deposition ◽  
Amorphous Tio2 ◽  
Shell Composite

In this work core/shell composite polymer/TiO2 nanofibers and from those TiO2 nanotubes were prepared. First, poly(vinyl alcohol) (PVA) and poly(vinylpyrrolidone) (PVP) fibers were synthetized by electrospinning. They were covered with a 100 nm thick amorphous TiO2 layer by atomic layer deposition at 50 °C. Later the polymer core was removed by two different methods: dissolution and annealing. In the case of dissolution in water, the as-prepared TiO2 nanotubes remained amorphous, while when annealing was used to remove the polymers, the TiO2 crystallized in anatase form. Due to this, the properties of amorphous and crystalline TiO2 nanotubes with exactly the same structure and morphology could be compared. The samples were investigated by SEM-EDX, ATR-IR, UV-Vis, XRD and TG/DTA-MS. Finally, the photocatalytic properties of the TiO2 nanotubes were studied by decomposing methyl-orange dye under UV light. According to the results, crystalline anatase TiO2 nanotubes reached the photocatalytic performance of P25, while amorphous TiO2 nanotubes had observable photocatalytic activity.

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