Synthesis and visible‐light‐derived photocatalysis of titania nanosphere stacking layers prepared by chemical vapor deposition

Abstract

BACKGROUND: In this study, visible-light-derived photocatalytic activity of metal-doped titanium dioxide nanosphere (TS) stacking layers, prepared by chemical vapor deposition (CVD), was investigated. The as-grown TS spheres, having an average diameter of 100-300 nm, formed a layer-by-layer stacking layer on a glass substrate. The crystalline structures of the TS samples were of anatase-type.

TiO2Nanotube Arrays Composite Film as Photoanode for High-Efficiency Dye-Sensitized Solar Cell

“…It not only exhibits few grain boundaries but also provides direct pathways for electron transportation, leading to the suppressed electron-hole recombination [7]. TNT-arrays have been fabricated by using various methods, such as sol-gel [8,9], hydrothermal [10,11] and chemical vapor deposition [12], and electrochemical anodization [13][14][15][16]. Electrochemical anodization has been recognized as more convenient and simpler approach to produce integrative vertically and highly ordered TNT-arrays with controllable structural morphologies [17].…”

Synthesis of High-Activity TiO2-Based Photocatalysts by Compounding a Small Amount of Porous Nanosized LaFeO3 and the Activity-Enhanced Mechanisms

“…TiO 2 is considered to be an ideal semiconductor photocatalyst due to its photostability, environmental friendliness, low cost, and strong oxidizing ability. − However, there are two main bottleneck factors hindering its practical application, including high photoinduced charge recombination rate and low efficiency for utilizing solar light. Numerous studies have been performed to handle these problems, including optimization of synthetic conditions, − surface modification, − impurity doping, − photosensitization, , coupling other semiconductors with narrow energy band gap, − and so on. Widely accepted, high anatase crystallinity, mixed phase composition, and large surface area are favorable to enhance the photocatalytic activity of nanosized TiO 2 under ultraviolet light. , Recently, our group synthesized highly active TiO 2 -based photocatalysts with high anatase thermal stability using ethylenediamine and mesoporous amorphous SiO 2 as the modifiers, attributed to the high anatase crystallinity and large surface area.…”

CVD Production of Doped Titanium Dioxide Thin Films

“…Hsieh et al prepared nanospheres of Ni‐ and Co‐doped titanium dioxide using CVD at 450 °C from titanium isopropoxide and the metal nitrates 85. Nickel nanoparticles were also deposited onto sulfur‐doped TiO 2 using a chemical vapor reductive deposition method proposed by Yoshinaga et al86 The S‐Doped TiO 2 was originally prepared using pulsed laser deposition, followed by formation of nickel nanoparticle islands by CVD.…”