ALD coating of centrifugally spun polymeric fibers and postannealing: case study for nanotubular TiO₂ photocatalyst

Abstract

This work describes the synthesis of highly photocatalytically active TiO2 tubes (TiTBs) by combining centrifugal spinning and atomic layer deposition (ALD). Poly(vinyl pyrrolidone) (PVP) fibers were first produced by centrifugal...

SiO2 Fibers of Two Lengths and Their Effect on Cellular Responses of Macrophage-like Cells

“…Nanofibers prepared by either centrifugal spinning [ 32 ] or electrospinning [ 33 ] have recently attracted significant attention due to their unique properties and morphologies that can be utilized in biomedicine, filtration, catalysis, and many other fields. In medicine, nanofibers are suitable for bone tissue engineering [ 34 ], 3D cell growth [ 35 ] drug delivery [ 36 ], and bioseparation [ 37 ] but also as templates for the deposition of other materials [ 38 , 39 ]. Centrifugal spinning offers a number of advantages compared to electrospinning, where the most interesting one for clinical applications is the use of spun solutions without any toxic elements in their preparation [ 31 ].…”

The surface chemistry of the atomic layer deposition of metal thin films

“…The new applications have demanded increasing levels of sophistication in the design of ALD cycles. For one, it is necessary to account for possible mass transport limitations in processes involving high-surface area solids (in porous materials for catalysis, as mentioned previously, but also for the metallization of fibers and polymers [154,[250][251][252][253]). Films of either alloys or layered superstructures, for optical elements or core-shell nanostructures, can be grown via ALD by expanding the sequence of gas dosing beyond the ABABAB.…”

Emerging Atomic Layer Deposition Technology toward High‐k Gate Dielectrics, Energy, and Photocatalysis Applications

“…For example, using the hydrophobic polymer film as the substrate, first dip coating with tannic acid, and then ALD coating TiO 2 for oil-in-water emulsion treatment, [79,80] as well as ALD coating ZnO on α-Al 2 O 3 carrier, improving the hydrophilicity of the membrane, reducing the roughness and pore size of the membrane, the ZnO ALD-modified membrane provides a potential sustainable and robust solution for the purification of produced water. [81] In the field of photocatalysis, ALD ZnO thin films, [82,83] ALD TiO 2 nanosheets, [84] ALD Au nanoparticles on TiO 2 , [85] and ALD TiO 2 on fibrous nanosilica [86] /PVP [87] were used for efficient photocatalytic degradation of methyl blue, rhodamine B, and methyl orange in water, as well as ALD MgO/ Ni [88] and ALD MgO/Pt/Zn-CeO 2 catalysts, [89] ALD Al 2 O 3 layer on TiO 2 nanorods [90] were used for efficient photocatalytic CO 2 reduction. In addition, membranes with hydrophilic and photocatalytic performance were prepared by ALD, due to its unique superior hydrophilicity, antifouling property, high permeability, and outstanding stability, which had a promising prospect for application in advanced oxidation process (AOP) in general or other AOP systems (e.g., Fenton and persulfate systems) as well as the possible hybrid systems (photo-Fenton, photopersulfate, Fenton-persulfate, etc.…”