FTIR study of adsorption and photoreactions of acetic acid on TiO2

Liao, Li-Fen; Lien, Chen-Fu; Lin, Jinru

doi:10.1039/b103419g

Cited by 131 publications

(163 citation statements)

References 19 publications

Supporting

Mentioning

143

Contrasting

Unclassified

Order By: Relevance

“…FT-IR data collected on the n-octanol/TCA phase before and after extraction of the Pu colloids ( Figure 5 b) shows an absorption at 1753 cm À1 belonging to the carbonyl stretching frequency of TCA, and a new peak at 1658 cm À1 after extraction consistent with the coordination of the TCA to the colloid, in agreement with studies demonstrating dative interactions between the carbonyl of carboxylic acids and Lewis acid sites on metal oxide surfaces. [19] [20] We ascribe these observations to a competition between the TCA and the anions for the surface of the particles.…”

mentioning

confidence: 99%

Separation of Plutonium Oxide Nanoparticles and Colloids

2011

View full text Add to dashboard Cite

Oil and vinegar: Colloidal plutonium is an important component of Pu aqueous speciation. Pu colloids are problematic in nuclear separations and are a potential transport vector in the environment. Using a mixture of n‐octanol and trichloroacetic acid a selective and reversible separation of these particles can be achieved by exploiting their surface reactivity. Picture: Li2[Pu38O56Cl42(H2O)20]⋅15 H2O.

show abstract

mentioning

confidence: 99%

Separation of Plutonium Oxide Nanoparticles and Colloids

2011

View full text Add to dashboard Cite

show abstract

“…The bridging acetates in Ti[(OH) y (OOCCH 3 ) x ] species have appeared in FT-IR spectrum. The peaks at 1029 cm −1 , 1049 cm −1 , 1351 cm −1 , 1453 cm −1 , 1553 cm −1 , 1607 cm −1 (inset) and 1614 cm −1 are assigned to adsorbed acetic acid on Ti sites [22][23][24][25]. In particular, the bands at 1614 cm −1 , 1553 cm −1 and 1453 cm −1 reveal that the acetate species (asymmetric ν asym (COO) and symmetric ν sym (COO) stretching vibrations) resulting from the acetic acid dissociation may bind to the Ti as a bidentate acetate ligands.…”

Section: Effect Of Acetic Acid and In Situ Water On Acetate Coordinatmentioning

confidence: 99%

Novel and facile synthesis of transparent-monolithic TiO2 gels by sol-gel method based on an esterification reaction

Elghniji

Anna-Rabah

Elaloui

2016

Materials Science-Poland

View full text Add to dashboard Cite

Transparent TiO 2 monoliths were obtained through a modified sol-gel route from titanium isopropoxide as a precursor. By controlling the hydrolysis of this precursor through the intermediate of esterification reaction between acetic acid and isopropanol at 40°C, transparent TiO 2 xerogel monoliths were obtained. The monoliths prepared by this method were transparent in the wavelengths between 400 nm and 700 nm. Fourier transform infrared (FT-IR) spectroscopy suggested that the acetic acid played also an active role as a chelating agent, forming Ti[(OH) y (OOCCH 3 ) x ] less reactive species. Powder X-ray diffraction confirmed the amorphous-to-anatase phase transformation with the formation of unknown Ti-containing complex at 90°C. Only anatase TiO 2 could be observed in the samples calcined at 250°C and 450°C. Optical aspects of the gel (transparenttransluscent transformation of monolithic gel) and gelation time were controlled by changing the amount of external water.

show abstract

“…At low pH values of 1 and 3, the molar ratios of acetate to acetic acid are $1.8 Â 10 À4 and $1.8 Â 10 À2 , respectively; therefore, the capping molecules on Au particles are predominantly dicarboxylic acid species which may be bound to the oxide surface containing hydroxy groups by hydrogen bonding interaction or through deprotonation forming chemical bonds with surface titanium ions. These two types of interactions have been reported for acetic acid molecules adsorbed on TiO 2 [12]. In addition to the interactions between the metal nanoparticles and oxide nanofibers, the hydrogen bonding between the capping organic molecules of adjacent Au particles may also assist in forming the high-density Au nanoparticles deposited on TiO 2 -B nanofibers, as shown in Fig.…”

Section: Ph Influence On the Au Deposition On Tio 2 -Bmentioning

confidence: 89%