Mechanochemical synthesis of barium titanate and its photocatalytic properties

Abstract

The nano-dispersed barium titanate was synthesised by mechanochemical treatment of barium titanyl oxalate and mixture of BaO and TiO 2 . Prepared barium titanate demonstrates higher photoactivity in comparison to the same sample obtained by traditional solid state reaction. Shift of absorption edge in the visible region and respective narrowing of the band gap for the milled samples were observed.

Structure and properties of plasma sprayed BaTiO3 coatings: Spray parameters versus structure and photocatalytic activity

“…BaTiO 3 was demonstrated to promote photocatalytic decomposition of diclofop methyl [12], Safranin T [13], or methylene blue [14]. Adsorption of gaseous acetone on brookite, anatase, and rutile TiO 2 nanoparticles shows typical infrared absorption bands at 1242, 1370, 1424, and 1690 cm À1 , albeit slightly shifted compared with liquid-phase acetone [15].…”

Mechanochemical Modification of V-Mo-Zr Oxide Compositions

“…Spectra of V 2 O 5 /MoO 3 /ZrO 2 compositions contain an asymmetric band with maximum characteristic for vanadium oxide, as well as broad band in the region > 600 nm due to the presence of metals with a low oxidation state. It can be seen that the band gap E g slightly decreases with enrichment of mixture the molybdenum and zirconium oxides, which have smaller values E g than V 2 O 5 [9,11].…”

“…These methods include mechanochemical activation (MChA) of solids. We have previously shown that the mechanochemical treatment of oxides' mixture (V 2 O 5 /MoO 3 ) and mixtures of oxidessalts (V 2 O 5 /(NH 4 ) 2 Mo 2 O 7 ) leads to their activation and improvement of catalytic properties in the mild oxidation processes of hydrocarbons [810] and photocatalytic properties [11].…”

Mechanochemical Synthesis of BaTiO3 Powders and Evaluation of Their Acrylic Dispersions

“…Such a methodology may reduce the size of the particles obtained and allows receiving nano-sized powders [25]. Such a synthesis was presented by Lazarevic et al [26], Sydorchuk et al [27], and Ohara et al [28]. Many investigations have been also performed on the suspensions of barium titanate [29,30] and the stability of such suspensions [31,32].…”