Surface properties of ceria synthesised using Triton-X based reverse microemulsions

Abstract

The effect of the tail length of Triton-X surfactants on the surface properties of ceria prepared by means of reversed micelles and Ce(O i Pr) 4 has been systematically studied. Generally, solids with increased surface areas (up to 136 m 2 g À1 ) were synthesised. It was shown that the tail length strongly affects the surface characteristics. Further studies were carried out using UV-Vis, ATR-FTIR, XRD and TGA/DSC studies of the precursor gels as well as N 2 -isothermal adsorption BET, XRD, FT-IR, UV-Vis diffuse reflectance and SEM investigations of the final solids samples. An interaction mechanism between the ceria precursor molecules and the polar tail of the reversed Triton X micelles and the formation of ceria (CeO 2 ) particles in the aqueous nucleus of the reversed microemulsions is proposed.

Modification of Copper-Ceria Catalyst via Reverse Microemulsion Method and Study of the Effects of Surfactant on WGS Catalyst Activity

“…In accordance with these XRD analysis results, it can be confirmed that the RME method can provide not only nanoparticles but also high dispersion of Cu on the surface of the CeO 2 support. In consonance with literature reviews, the average crystallite size of the catalysts prepared by the RME method can contribute to the nanoparticle size distributions within the range of 2-50 nm [31][32][33]. To enhance this statement, the average crystallite size for each Besides, in the comparative analysis of XRD patterns of 20% Cu-CeO 2 and 20% Cu-CeO 2 (IMP) as depicted in Figure 1, CuO and CeO 2 peaks were observed in these two samples at similar positions correspondingly.…”

“…In consonance with literature reviews, the average crystallite size of the catalysts prepared by the RME method can contribute to the nanoparticle size distributions within the range of 2-50 nm [31][32][33]. To enhance this statement, the average crystallite size for each sample was calculated from XRD patterns by using Debye-Scherrer Equation.…”

Surfactant effects on the synthesis of porous cerium oxide from a type IV deep eutectic solvent

“…varying the reaction time, temperature, urea/base concentration 14,22 and templating using surfactant self-assembly. 23 Porosity modication via templating using surfactant self-assembly 24 and microemulsions, 25 or hard templates such as mesoporous silica 26 has been a very popular route in hydrothermal synthesis methods; however, these methods require multiple steps, long reaction times, high temperatures and the use of toxic components. In hydrothermal so templating methods, the yields can also be quite low due to the decrease in the solubility of the synthesis precursors at high surfactant concentrations.…”

One-pot hydrothermal synthesis of fluorophore-modified cerium oxide nanoparticles

“…Various methods are used to synthesize CeO 2 NPs, including precipitation, 14 co-precipitation, 15 sol–gel, 16 sonochemical, 17 microemulsion, 18 and hydrothermal, 19 microwave 20 syntheses, and a combination of methods. 21 Hydrothermal synthesis is most promising for producing CeO 2 NPs with a narrow size distribution, high stability, and a fairly small size (2–10 nm).…”