Synthesis and properties of nanodisperse structures of titanium minerals by the example of anatase

Hydrothermal synthesis of TiO2 nanotubes from concentrate of titanium ore of Pizhemskoe deposit (Russia)

“…Until recently the starting material for TiO 2 nanotubes synthesis was only high-purity synthetic analogs [1][2][3][4][5]7]. In 2011 a group of scientists published a paper [10], which provided data on the production of titanium dioxide nanotubes by the hydrothermal method from Thai leucoxene.…”

“…The crystalline lattice of initial rutile is converted into amorphous product at alkali processing, after treatment with distilled water and solution of hydrochloric acid the titanium dioxide nanotubes are formed. According to [7], the nanotubes consist of layers of titanate, which composition depends on such synthesis conditions as temperature and duration of treatment, ratio of solid and liquid phases. Fig.…”

“…The resolution of scanning electron microscope allows evaluating their outside diameter (70-100 nm) and length (up to 4500 nm). The synthesized TiO 2 nanotubes have a large surface area, which is, according to [7], by orders higher than the specific surface of the starting raw, which provides high sorption properties.…”

“…After the pioneer works by T. Kasuga et al [6] the hydrothermal method became one of the most applied methods for the production of one-dimensional (1D) nanostructured TiO 2 products. The authors previously published a number of works on the synthesis of TiO 2 nanotubes from synthetic analogs of titanium minerals and their application [7][8][9].…”

“…TiO 2 nanotubes were produced by a simple hydrothermal method. The procedure for the preparation of nanostructures from synthetic TiO 2 is described elsewhere [7,9]. In this work this procedure is adapted for the nonmagnetic fraction of gravity concentrate of titanium ore of Pizhemskoe deposit.…”