ATR–FTIR study of the stability trends of carboxylate complexes formed on the surface of titanium dioxide particles immersed in water

A strategy for improving deactivation of catalytic combustion at low temperature via synergistic photocatalysis

“…6b, the used MnO x -CeO 2 sharply displays two distinctive peaks, compared to that of the fresh and regenerated samples. The two intense absorptions located at 1350 cm −1 and 1561 cm −1 are diagnostically indexed to the symmetrical and anti-symmetrical stretching vibration of carboxyl (O C O) groups [51,52]. This is consistent with the results from the C 1s XPS, featuring the role of reaction intermediates during the catalyst cycles.…”

Attenuated Total Reflection - Infrared Spectroscopy Applied to the Study of Mineral - Aqueous Electrolyte Solution Interfaces: A General Overview and a Case Study

“…The remainder of the section discusses in some detail published findings from ATR-FTIR spectroscopy. Oxalic acid is the simplest polyacid molecule (COOH) 2 and its adsorption is the most common subject of study by ATR-IR on oxy-hydroxides of aluminum (Axe and Persson, 2001;Rosenqvist et al, 2003;Yoon et al, 2004;Dobson and McQuillan, 1999), iron (Borda et al, 2003;Duckworth and Martin, 2001;Persson and Axe, 2001), chromium (Degenhardt and McQuillan, 1999;Garcia Rodenas et al, 1997), titanium (Hug and Sulzberger, 1994;Weisz et al, 2001;Weisz et al, 2002;Dobson and McQuillan, 1999), silicon (Kubicki et al, 1999), tantalum (Dobson and McQuillan, 1999) and zirconium (Dobson and McQuillan, 1999). The spectra of species in solution, i.e.…”

“…The isotherm at constant pH (3) was fitted by three Langmuir components, correlated with the three possible solute species (H 2 Ox/HOx -/Ox 2-). Weisz et al (2001Weisz et al ( , 2002 have used the same protocol, and have measured three Langmuir stability constants. Dobson and McQuillan (1999) have recorded the spectra of Na 2 [TiO(Ox) 2 ] 2 .…”

Photocatalytic oxidation of oxalic acid in dilute aqueous solution, in a fully illuminated fluidized bed reactor

“…At similar conclusions arrived Weisz et al (2001), and Araujo et al (2005) in a series of systematic works devoted to the analyses of the heterogeneous photocatalytic oxidation of salicylic and oxalic acids and their salts on the surface of TiO 2 , and characterization of the reaction intermediates, using FTIR spectroscopy. Some of them also reported a transient redistribution of adsorbed oxalate complexes on the titania surface upon UV irradiation (Mendive et al, 2006(Mendive et al, , 2007.…”