Fluidized-bed atomic layer deposition reactor for the synthesis of core-shell nanoparticles

2014 ◽  
Vol 85 (1) ◽  
pp. 013905 ◽  
Author(s):  
Arjen P. Didden ◽  
Joost Middelkoop ◽  
Wim F. A. Besling ◽  
Diana E. Nanu ◽  
Roel van de Krol
Keyword(s):  
Atomic Layer Deposition ◽  
Fluidized Bed ◽  
Atomic Layer ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Layer Deposition ◽  
Core Shell Nanoparticles

scholarly journals Ligand-induced reduction concerted with coating by atomic layer deposition on the example of TiO2-coated magnetite nanoparticles

2019 ◽  
Vol 10 (7) ◽  
pp. 2171-2178 ◽  
Author(s):  
Sarai García-García ◽  
Alberto López-Ortega ◽  
Yongping Zheng ◽  
Yifan Nie ◽  
Kyeongjae Cho ◽  
...  
Keyword(s):  
Atomic Layer Deposition ◽  
Magnetite Nanoparticles ◽  
Atomic Layer ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Metal Source ◽  
Novel Approach ◽  
Layer Deposition ◽  
Core Shell Nanoparticles

An appropriate atomic layer deposition precursor, as a function of the ligand of the metal source, can unveil a novel approach to concertedly coat and reduce γ-Fe2O3 nanoparticles to form Fe3O4/TiO2 core/shell nanoparticles.

scholarly journals Synthesis of Ag-ZnO core-shell nanoparticles with enhanced photocatalytic activity through atomic layer deposition

2019 ◽  
Vol 177 ◽  
pp. 107831 ◽  
Author(s):  
Sejong Seong ◽  
In-Sung Park ◽  
Yong Chan Jung ◽  
Taehoon Lee ◽  
Seon Yong Kim ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Atomic Layer Deposition ◽  
Atomic Layer ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Layer Deposition ◽  
Core Shell Nanoparticles

scholarly journals Photocatalytically Active Amorphous and Crystalline TiO2 Prepared by Atomic Layer Deposition

2019 ◽  
Author(s):  
Orsolya Kéri ◽  
Lenke Kócs ◽  
Zoltán Hórvölgyi ◽  
Zsófia Baji ◽  
Krisztina László ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Atomic Layer Deposition ◽  
Atomic Layer ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Amorphous Sio2 ◽  
Methylene Orange ◽  
Layer Deposition ◽  
Vis Spectroscopy ◽  
Amorphous Al2o3

In this work, the photocatalytic properties of amorphous and crystalline TiO2 deposited on oxide and polymer nanoparticles by atomic layer deposition (ALD) were studied. Beside TiO2, as reference, both ALD grown amorphous Al2O3 and crystalline ZnO layers were also examined. When choosing the carrier, the priority was that it had no effect on the photocatalytic activity of TiO2; therefore the oxide layers were deposited on SiO2 and poly(methyl-methacrylate) (PMMA) nanoparticles. The amorphous SiO2 particles were synthetized by the Stöber method, while the PMMA particles were prepared by emulsion polymerization. Both the bare and core/shell composite nanoparticles were investigated by SEM-EDX, TEM, FT-IR, and XRD. Finally, the photocatalytic activity of PMMA, SiO2 and the core/shell nanoparticles was measured by the decomposition of methylene orange, monitored by UV-Vis spectroscopy. Based on the results, the SiO2 was uniformly coated with the deposited oxide films, while in the case of the PMMA a contiguous web-like polymer/TiO2 matrix was formed. During the photocatalytic reactions, the amorphous Al2O3 was not active, while the crystalline ZnO and TiO2 showed good photocatalytic activity. The amorphous TiO2 deposited by ALD on the SiO2 and PMMA nanoparticles had smaller, but a clearly detectable photocatalytic effect on the photodegradation of methylene orange.

One-Dimensional TiO2@GaON Core-Shell Nanowires with Controlled Shell Thickness from Atomic Layer Deposition for Stable and Efficient Photoelectrochemical Water Splitting

2019 ◽  
Author(s):  
Jiajia Tao ◽  
Hong-Ping Ma ◽  
Kaiping Yuan ◽  
Yang Gu ◽  
Jianwei Lian ◽  
...  
Keyword(s):  
Atomic Layer Deposition ◽  
Band Gap ◽  
Water Splitting ◽  
Atomic Layer ◽  
Photoelectrochemical Water Splitting ◽  
Core Shell ◽  
Photoelectrochemical Performance ◽  
Highly Efficient ◽  
Layer Deposition ◽  
Shell Nanowires

<div>As a promising oxygen evolution reaction semiconductor, TiO2 has been extensively investigated for solar photoelectrochemical water splitting. Here, a highly efficient and stable strategy for rationally preparing GaON cocatalysts on TiO2 by atomic layer deposition is demonstrated, which we show significantly enhances the</div><div>photoelectrochemical performance compared to TiO2-based photoanodes. For TiO2@20 nm-GaON core-shell nanowires a photocurrent density up to 1.10 mA cm-2 (1.23 V vs RHE) under AM 1.5 G irradiation (100 mW cm-2) has been achieved, which is 14 times higher than that of TiO2 NWs. Furthermore, the oxygen vacancy formation on GaON as well as the band gap matching with TiO2 not only provides more active sites for water oxidation but also enhances light absorption to promote interfacial charge separation and migration. Density functional theory studies of model systems of GaON-modified TiO2 confirm the band gap reduction, high reducibility and ability to activate water. The highly efficient and stable systems of TiO2@GaON core-shell nanowires provide a deeper understanding and universal strategy for enhancing photoelectrochemical performance of photoanodes now available. </div>

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