Glycothermal Synthesis and Photocatalytic Properties of Highly Crystallized Anatase TiO<SUB>2</SUB> Nanoparticles

Abstract

Highly crystallized anatase TiO2 nanoparticles were synthesized at a temperature as low as 120 °C through a glycothermal reaction using amorphous titanium hydrous gel as precursor and 1,4-butanediol and water as solvent. X-ray diffraction (XRD) and transmission electron microscopy (TEM) data support that the glycothermal processing method provides a simple low-temperature route for producing highly crystallized anatase TiO2 nanoparticles without pH adjustment. It is demonstrated that the shape and dispersability of TiO2 nanoparticles can be controlled by the reaction conditions, such as the reaction temperature and variation of the volume ratio of 1,4- butanediol/water (B/W). It was observed that TiO2 samples glycothermally prepared at 220 °C and the B/W ratio of 8/0 showed excellent photocatalytic behavior. The high activity is attributed to the high crystallinity and bipyramidal shape of the particles, which have fewer defects and more active {101} surfaces.

Photocatalytic degradation of rhodamine B catalyzed by TiO2films on a capillary column

“…In recent years, many researchers have studied photocatalysis using powder 7,8 or thin film 9–11 titania. Powder titania has a wider application because of its high specific surface area, quantum yield, and photocatalytic efficiency.…”

Preparation of Mg-doped TiO2 nanoparticles for photocatalytic degradation of some organic pollutants

“…The diffractograms of pure and Mg-doped TiO 2 nanoparticles (0.75 and 1.5 at.%) are shown in Figure 1. It is obvious from the patterns, the anatase phase is the main phase in all samples [25]. However, a weak diffraction peak along (1 1 0) indicating the rutile phase is observed for pure titania showing the formation of a mixed phase structure for this sample.…”

Facile Glycothermal Synthesis of KxNa(1−x)NbO3 Particles

“…To synthesize crystalline particles using the glycothermal concepts embodied in hydrothermal processing approaches, a few investigations have studied the use of nonaqueous systems as glycol media. We have shown that a glycothermal process provides a facile low-temperature route to produce BaTiO 3 , Fe 3 O 4 , Y-doped ZrO 2 , TiO 2 , ZnO, and ZnS particles with the desired morphology and size, as described in our previous study [35][36][37][38][39][40][41]. Our research embodies some novelty concepts that differ from the reported technology for particle synthesis.…”

“…This result was consistent with the FT-IR analyses, as shown in Figure 9. The weak band at 1640 cm −1 , between 3600 cm −1 and 4000 cm −1 (bending mode of H 2 O), indicates that some H 2 O is present [38,39]. The two broad peaks at around 750 cm −1 and 3350 cm −1 are associated with the O-H stretching vibration of absorbed water and hydroxyl group [27,38,39].…”