Hydrothermal Production of SrTiO3 Nanotube Arrays

Abstract

Strontium titanate (SrTiO3) nanotube arrays were produced through a simple hydrothermal process from amorphous TiO2 nanotubes arrays. The resulting samples were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). During the hydrothermal treatment, the TiO2 nanotube arrays retained their shape to produce SrTiO3 nanotube arrays. The formation mechanism can be explained by the nanoscale Kirkendall effect.

Tailored TiO2−SrTiO3 Heterostructure Nanotube Arrays for Improved Photoelectrochemical Performance

“…Although the TiO 2 nanotubes were amorphous, we were able to obtain SrTiO 3 nanotubes in the crystalline form while maintaining the vertical alignment of the nanotube array. Our observation in the reaction of Sr(OH) 2 with amorphous TiO 2 nanotubes is consistent with the previous reports. − However, the pure SrTiO 3 nanotube arrays obtained from amorphous TiO 2 films were inferior for the generation of photocurrent during the evaluation of photoelectrochemical behavior (see Supporting Information Figure S2). Hence, the following discussion on the photoelectrochemical properties will involve films shown in Figures and .…”

Synthesis and characterization of nanocrystalline strontium titanate through a modified combustion method and its sintering and dielectric properties

“…Synthesis of advanced ceramics as nanoparticles is one of the major challenges in the development of materials processing technology and the advantages of nanocrystalline materials are superior phase homogeneity, sinterability and microstructure leading to unique mechanical, electrical, dielectric, magnetic and optical properties [16]. For the synthesis of nanoparticles of SrTiO 3 wet chemical methods such as sol-gel technique [17][18][19], hydrothermal method [20,21], precipitation methods [22,23] and combustion routes [24][25][26][27] are reported. In combustion synthesis, which was developed in late 1980s, an oxidant and fuel are added to the precursor solution containing the respective metal ions and subjected to auto-ignition upon heating [28,29].…”

Electrochemical Fabrication of Strontium-Doped TiO2 Nanotube Array Electrodes and Investigation of Their Photoelectrochemical Properties

“…Of particular interest, strontium titanate (SrTiO 3 ) has been intensively investigated as a photoanode for water splitting due to its high corrosion resistance, excellent photocatalytic activity, high stability, and nontoxicity. − Although SrTiO 3 has band edges that straddle both oxygen and hydrogen redox potentials, it still suffers from its wide-band-gap (3.2 eV) nature. Recently, the specific phenomenon of combining the properties of both titania and SrTiO 3 has attracted great attention. − Jitputti and co-workers reported the hydrothermal synthesis of SrTiO 3 from amorphous TiO 2 nanotube arrays . Using the same hydrothermal post-treatment method, Kamat and co-workers were able to fabricate TiO 2 nanotubes decorated with SrTiO 3 particles/clusters.…”

“…21À23 Jitputti and co-workers reported the hydrothermal synthesis of SrTiO 3 from amorphous TiO 2 nanotube arrays. 24 ABSTRACT: In recent years, considerable efforts have been made to improve the performance of photoactive nanostructured materials for water-splitting applications. Herein, we report on the fabrication and photoelectrochemical properties of highly ordered Sr-doped TiO 2 nanotube arrays synthesized via a one-step electrochemical anodization technique.…”