TiO₂‐Based Composite Nanotube Arrays Prepared via Layer‐by‐Layer Assembly

Abstract

A simple and versatile technique has been developed to prepare TiO2 and TiO2‐based composite (TiO2–CdS and TiO2–Au) nanotube arrays. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy‐dispersive X‐ray (EDX) analysis, X‐ray diffraction (XRD), thermogravimetric analysis (TGA), UV‐vis spectroscopy, and photoluminescence (PL) spectroscopy are used to characterize their morphology, structure, composition, and properties. The TiO2–CdS nanotubes contained many TiO2 and CdS quantum dots and exhibited a novel PL band in the blue‐wavelength range. The reported strategy will be useful for fabricating nanoparticle–nanoparticle composite nanostructure arrays, which are suitable for applications in catalysis, chemical sensors, nanoelectrodes, and nanodevices.

Freestanding Nanostructures via Layer‐by‐Layer Assembly

“…3). [64] The produced nanotubules are quite uniform with outer diameters of 215 ± 26 nm, lengths ranging up to 60 lm, and wall thicknesses ranging from 30 to 70 nm, as defined by the fabrication process.…”

Photocatalytical Properties of TiO₂ Nanotubes

“…Early studies concentrated on the formation of CdS/TiO 2 combination by depositing CdS microcrystals (4-20 nm) onto TiO 2 particles or highly porous thin films [107][108][109]. Recently, CdS/TiO 2 nanotubes were successfully prepared using layer-by-layer deposition [110], chemical bath deposition [111] and electrodeposition methods [98]. For example, Hsu et al [111] synthesized a novel CdS@TNT coaxial nanocables using wet chemical bath deposition with porous AAO as templates (see Fig.…”

Titania-based functional nanocomposite materials fabricated by liquid processes

“…TiO 2 -containing nanocomposites with mesoporous, 18) nanorod, 19) nanowire, 20) and nanotube 21) structures have been fabricated to date (Fig. 1).…”