Preparation, Characterization of Dawson-type Heteropoly Acid Cerium (III) Salt and Its Catalytic Performance on the Synthesis of n-Butyl Acetate
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2024, Chemical Engineering JournalVisible light induced molecularly imprinted Dawson-type heteropoly acid cobalt (II) salt modified TiO<inf>2</inf> composites: Enhanced photocatalytic activity for the removal of ethylparaben
2020, Colloids and Surfaces A: Physicochemical and Engineering AspectsCitation Excerpt :For CW sample, the initial weight loss is 5.63 % during the heating process from 30 °C to 220 °C, corresponding to the loss of fifteen crystalline water molecules, a strong endothermic peak appeared at 130.5 °C in the DSC curve. A slow weight loss (1.98 %) process from 220 °C and 425 °C, corresponding to the loss of five structure water molecules, and an endothermic peak appeared at 281.8 °C in the DSC curve which indicates that the heteropolyacid anionic skeleton begins to decompose [33]. Similarly, for 0.25CWMT sample, the weight loss (0.42 %) from 30 °C to 220 °C is originated from the removal of adsorbed water and ethanol, an endothermic peak appeared at 77.5 °C in the DSC curve.
Tailored Brønsted and Lewis surface acid sites of the phosphotungstic Wells Dawson heteropoly-acid
2019, Applied Surface ScienceCitation Excerpt :In this particular case, there is a remaining proton (not exchanged by the metal ion) in the Wells Dawson structure therefore, the presence of Brønsted acidity is straightforward. The presence of Brønsted acidity in the transition metal containing salts (even when no protons remain within the structure) is attributed to the dissociation of water on the cation such as [M(H2O)n]n+ = [M(OH)(H2O)n−1]n+−1 + H+ [5]. WDMn, WDCr and WDCu possess the highest amount of water molecules associated to the structure (31, 26 and 27 molecules of H2O per molecular formula) therefore, it is expected the highest amount of protons formed due to water dissociation.
Continuous synthesis of ethyl levulinate over Cerium exchanged phosphotungstic acid anchored on commercially silica gel pellets catalyst
2017, Molecular CatalysisCitation Excerpt :Thus it is still of great interest to exploit an efficient kind of metal salt of HPAs. Cerium is one of the most used rare earth element to be used as catalysis material, and Ce salt of HPAs has been applied for various reactions [21,22]. Generally, the powder forms of ZrO2, Al2O3, TiO2 and SiO2 have been used to supported the HPAs salts and displayed well performance [20,23,24].
Solvent extraction of lanthanum and cerium ions from hydrochloric acidic aqueous solutions using partly saponified 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester
2016, Chinese Journal of Chemical EngineeringCitation Excerpt :Rare earth elements (REEs) have been drawing great attention because of their extensive applications in permanent magnet[1], catalyst[2,3], metallurgy[4,5], and other high-technology domains[6].
Supported by the National Natural Science Foundation of China (21161009), the Natural Science Foundation of Jiangxi Province (20122BAB213001, 20114BAB213002) and the Science and Technology Foundation of Jiangxi Province (GJJ11613).