Growth evolution of ammonium oxotrifluorotitanate discoid crystal on glass prepared by ammonium hexafluorotitanate and boric acid

Abstract

A high quality ammonium oxofluorotitanate discoid crystal is grown on glass with an aqueous solution of ammonium hexafluorotitanate and boric acid in this study. The glass acts as a scavenger to enhance the nucleation of ammonium oxofluorotitanate crystal, and the growth evolution is examined. The composition and structure are examined by Raman spectroscopy, Fourier-transform infrared spectrometry, x-ray diffraction and high-resolution transmission electron microscopy. The discoid crystal shows high crystalline quality and composition uniformity. The energy bandgap is 3.7 eV.

Nanotubes with anatase nanoparticulate walls obtained from NH4TiOF3 nanotubes prepared by anodizing Ti

“…The bands at 206 cm À1 and 705 cm À1 are assigned to the NH 4 + translational mode, and 2n 6 of NH 4 + , respectively. 31 The vibrational mode at 870 cm À1 is attributed to the narrowing of the Ti-O-F internal vibrations in NH 4 TiOF 3 . 32 In Fig.…”

“…These bands are assigned to the absorbed water molecules. 31,36,37 In Fig. 4b-ii, the IR spectrum related to NP-NT is shown.…”

Fluoride Processing of Titanium-Containing Minerals

“…The synthesis of N-F-codoped TiO 2 powders with a homogenous anatase structure via a thermal decomposition of different ammonium oxofluorotitanate precursors at 550 o C was reported [17]. Uniform ammonium oxofluorotitanate (NH 4 TiOF 3 ) mesocrystals and their conversion to mesocrystals of TiO 2 were described [18][19][20]. Titanium oxyfluoride TiOF 2 was synthesized for obtaining of thermally stable TiO 2 of high photocatalytic activity [21] and for its use as anode material for lithium-ion battery [22].…”

PTh-rGO-TiO2 nanocomposite for photocatalytic hydrogen production and dye degradation

“…The band observed at 442 cm -1 (E g ) represents rutile phase of TiO 2 [31]. The peak at 749 cm -1 is attributed to Ti-O bond [32]. The peak at 680 cm -1 and 749 cm -1 represents C-S stretching of the polythiophene.…”