Simple hydrothermal synthesis and photocatalytic performance of coral-like BaTiO₃ nanostructures

Abstract

Coral-like BaTiO 3 nanostructures have been successfully synthesized via a simple hydrothermal route at 150 °C for 15 h, employing BaCl 2 , tetrabutyltitanate [(C 4 H 9 O) 4 Ti] and NaOH as original reactants without the assistance of any surfactant or template. The phase of the as-obtained BaTiO 3 was characterized by X-ray powder diffraction (XRD). Energy dispersive spectrometry (EDS), scanning 10 electron microscopy (SEM) and (high-resolution) transmission electron microscopy (TEM/HRTEM) were employed for the composition and morphology analyses of the final product. Some factors influencing the formation of coral-like BaTiO 3 nanostructures were investigated, including the amount of original NaOH, the barium ion source, and the reaction temperature and time. Experiments showed that the as-prepared coral-like BaTiO 3 nanostructures presented good photocatalytic activity for the 15 degradation of methyl orange (MO) dye under the irradiation of the mimic sunlight. It was found that the photocatalytic activity of coral-like BaTiO 3 nanostructures could be affected by the pH value of the system.

A facile one step conversion of the sub-micrometer to uniform nanopowder in tetragonal BaTiO3 via a surface active etching salt

“…A well-defined size and shape of BaTiO 3 nanoparticles could be obtained from the direct reaction of precursor ions through the hydrothermal method [9,10], while the solvothermal technique can produce more uniform nanoparticles, due to complex organic solvents preventing their agglomeration [11][12][13]. The sol-gel process shows outstanding control of a very small particle size (~10-50 nm) by using complex compound solution [14,15].…”

Synthesis of BaTiO3nanoparticles as shape modified filler for high dielectric constant ceramic–polymer composite

“…Lack of active site make BT particles from coral-like shape. 31 Finally, the BT synthesis for coral-like NPs carried with a NaOH concentration of 0.3 M, reaction temperature 190 C, reaction time 15 hours and BaCl 2 $2H 2 O as the Ba source. 3.1.2 BET surface area of BT.…”

Hydrothermal synthesis, dielectric properties of barium titanate, cobalt doped barium titanate, and their graphene nanoplatelet composites

“…In recent years, improving the dielectric, ferroelectric, and ferromagnetic properties of BT ceramics by doping with metals and oxide additives has attracted a great deal of research interests for their use in increasing the performance of several electronic devices 4,5 . Usually, the BT powders are synthesized by a number of leading routes, for instance, sol–gel, 7 coprecipitation, 8 hydrothermal, 9,10 Pechini, and electrochemical methods 11 . The metal doping in BT ceramics is achieved via the methods such as hydrothermal, 4 solid‐state reactions, 12 laser ablation, 13 implantation, 14 and wet‐chemical processes 15 .…”