Efficient synthesis of titania nanotubes and enhanced photoresponse of Pt decorated TiO2 for water splitting

Abstract

We investigated the effect of HMT (hexamethylenetetraamine) on the anodic growth of TiO 2 nanotube arrays. The tube length increases to 4.3 μm with HMT concentration increasing to 0.04 mol$L -1 . Adsorption of HMT on the TiO 2 surface is shown to markedly decrease the chemical dissolution rate of tube mouth, resulting in longer nanotube length. Furthermore, Pt nanoparticles were successfully deposited on the surface of TiO 2 nanotubes by ac electrodeposition method. The TiO 2 /Pt composites were characterized by field emission scanning electron microscope (FESEM), X-ray photoelectron spectra (XPS), and photoelectrochemistry. An enhancement in photocurrent density has been achieved upon modification of TiO 2 nanotubes with Pt nanoparticles.

A Review on TiO2 Nanotubes: Influence of Anodization Parameters, Formation Mechanism, Properties, Corrosion Behavior, and Biomedical Applications

“…Most recent research on TNT focuses on the doping or deposition of some metal ions such as Ta [100], Au [33, 68,101], Ag [102][103][104], Ru [105], B [106], Fe [107], Cu [69], Pd [108], Pt [109,110], Ni [111,112], Cr [113], Nd [114], Sr [115,116], Zr [117,118]; and non-metals like C [20, [119][120][121][122], N [123,124], and F and B [125]; and metal oxides like MnO 2 [126] had enhanced its applications in many fields. Most recently, Loget et al [127] coated biomimetic polydopamine into TNT for the development of biomedical devices.…”

The Effects of Pt Doping on the Structure and Visible Light Photoactivity of Titania Nanotubes

“…Platinum is one of the more favorable noble metal dopants to enhance the photocatalytic activity of the titania . Pt-doped titania nanotube arrays prepared by anodization are used for photocatalytic water splitting and carbon dioxide reduction reactions by several research groups. ,, Kim et al reported the visible light photoactivity of Pt-doped titania powder. Ishibai et al reported a higher visible light activity of Pt-modified titania by the formation of Ti−O−Pt bonds .…”

Enhancement of Photoelectrocatalysis Efficiency by Using Nanostructured Electrodes

“…Organics degradation [206], [207] Water splitting [208], [158] Disinfection [14], [15], [209] TiO 2 thin film Organics degradation [171], [172], [189] Water splitting [210], [211] Disinfection [212], [62] Doped TiO 2 thin film Organics degradation [213], [214], [215], [205], [216] Table 2. Photoelectrocatalytic applications of doped and undoped TiO 2 -based nanostructured semiconductors…”