Titania Nanoparticles Synthesized by Sol-Gel Technique

Abstract

Titania (TiO 2) nanoparticles were prepared by combining bulk titania with trisodium citrate solution at room temperature without calcination. The formation of titania nanoparticles was confirmed from XRD and by the dominant FTIR peaks at 621 cm-1 , 412 cm-1. UV-Visible analysis shows the occurrence of strong red shift, confirming the presence of nanoparticles which is essential for higher photo catalytic activities. TGA analysis reveals that the synthesized titania nanoparticles were thermally stable up to 700 °C. SEM image shows that the particles of the synthesized sample are in nanometer range which is in accordance with UV-Visible studies.

Fabrication of carbon and sulphur-doped nanocomposites with seaweed polymer carrageenan as an efficient catalyst for rapid degradation of dye pollutants using a solar concentrator

“…15.43 nm ± 1.1 nm and ca. In all cases the mass loss was obtained in the range of 2 to 4 % up to 800 o C may be traces of impurities in the form of moisture and some organic impurities [33]. This finding indicates that different sizes of nanocomposites might be obtained by using carrageenans of different sulphate level.…”

Photocatalytic degradation of Acid Red dye stuff in the presence of activated carbon-TiO2 composite and its kinetic enumeration

“…Calcinations of TiO 2 at remove the hydroxyl and carboxylate peaks. Peak at 757 cm −1 represents the stretching of Ti-O bond which is the characteristic attribute of the formation of TiO 2 nanoparticles [45]. FTIR study of A·C/TiO 2 nanoparticles shows the shift in the OH vibration band towards lower wave number (3400 cm −1 ) as compared to that corresponding to TiO 2 .…”

“…10 g each of P25 TiO 2 and activated carbon were mixed in diluted solution and again stirred for three hours . Thus, the final solution obtained was filtered through (45 m) filter and oven dried for 24 h at 85 • C. The resulted sample was powdered and calcinated at 350 • C [39][40][41][42][43][44][45][46][47][48][49]. The photocatalyst finally obtained with the specific surface area (SSA) of 288.70 m 2 /g was used for further experimental process.…”

Development of copper doped titania based photoanode and its performance for dye sensitized solar cell applications

“…Increase in hydroxyl content enhances the photocatalytic activity. The reason is that the hydroxyl group can behave as a center for capturing the photo-excited electron [38].…”