Synthesis of nanosized TiO₂powder by sol gel method at low temperature

Abstract

2016) Synthesis of nanosized TiO 2 powder by sol gel method at low temperature, Molecular Crystals and Liquid Crystals, 627:1, 170-175, ABSTRACTNanotechnology is all about making products from very small constituents, components or subsystems to gain greatly enhanced material properties and functionality. Nanocrystalline anatase TiO 2 was prepared by a facile sol-gel route at a temperature of 50°C under mild conditions. Titanium tetraisopropoxide (TTIP) was used as a titanium precursor, and 2-propanol was used as a solvent. XRD, TEM, SEM, FT-IR and BET were applied to characterize the crystal phase. The Crystalline size of TiO 2 powder has been obtained with diameter < 30 nm for anatase at 500°C using an acid.

Assessment on the Effect of Sulfuric Acid Concentration on Physicochemical Properties of Sulfated-Titania Catalyst and Glycerol Acetylation Performance

“…The chemical and physical absorption of the hydroxyl group on the surface of the sulphated catalysts proves that these catalysts are anhydrous metal oxide catalysts [44,45]. The band observed at 1632 cm −1 is due to the scissor bending vibration of the molecular water (H-O-H), assigned as chemisorbed water [46,47]. A band between 1222 cm −1 to 1100 cm −1 are assigned to the S=O group which indicates the existence of sulphate species.…”

The mathematical fractional modeling of TiO_2 nanopowder synthesis by sol–gel method at low temperature

“…Since molar concentration of A, B, C, D and E are considered nonnegative, where A 0 and B 0 must be nonzero for an chemical reaction. Initial condition C 0 = D 0 = E 0 = 0, A 0 = 12.35 mol/l and B 0 = 19.25 mol/l taken from article in [13], we did the same experiences mentioned in [13] and the obtained results are shown in Figure 5. For the numerical simulations we take k 1 = 0.05, k 2 = 3, and k 3 = 6.…”

“…In general, TiO 2 is preferred in anatase form because of its high photo catalytic activity, since it has a more negative conduction band edge potential (higher potential energy of photogenerated electrons), high specific area, non-toxic, photochemically stable, and relatively inexpensive [5]. Several methods for the preparation of nanocrystalline TiO 2 have been developed and they are electrochemical reaction [6], supercritical carbon dioxide [7], precipitation [8], multi-gelation [9], chemical solvent and chemical vapor decomposition [10], ultrasonic irradiation [11], aerogel [12], xerogel [13] and sol-gel [14], the latter is the most used because it makes it possible to obtain ultra-fine nanopowder [15][16][17][18][19][20][21][22].…”

“…In subsection 2.6, we study the determination of equilibrium points and in the last section we illustrate our model by numerical simulation and compare it to real data. In this section, we synthesized TiO 2 nanopowders by the solgel method using the following reagents: titanium tetraisopropoxide, 2-propanol and distilled water, with a reflux of 70 • C. The gel obtained was dried at 70 • C for approximately 16 hours to evaporate the solvent, then calcined in an oven to give the TiO 2 nanopowder (rutile, anatase ou brookite), in this work the calcination is at 500 • C for to give the anatase nanopowder [13]. These steps are explained in Figure 2.…”

Studying the Crystal Structure, Topography, and Anti-bacterial of a Novel Titania (TiO2 NPs) Prepared by a Sol-gel Manner

“…In the two structures, the titanium molecule is encompassed by six oxygen particles and every oxygen iota are encompassed by three iotas of titanium (17). TiO 2 NPs have been synthesized using various techniques, for example, hydrothermal (18), sonochemical (19), solvothermal (20), Reverse micelle (21), and sol-gel method (22) for those applications. As of late, the sol-gel process has been utilized for the planning of TiO 2 NPs (23).…”