Quantitative determination of hydroxyl groups on alumina by IR spectroscopy

Adsorption of stereoregular poly(methyl methacrylates) on ?-alumina: Spectroscopic analysis

“…), but also on the nature of the native oxide surface. 6,40,41 Acid-base interactions can be investigated by FTIR spectroscopy, used in the diffuse reflectance mode (DRIFT) on powder samples, since the electron transfer generated by the interaction weakens the carbon-oxygen double bond and leads to a shift of the carbonyl band toward lower frequencies. 2,3 This shift enables the calculation of the acid-base interaction enthalpy ⌬H ab since:…”

FTIR Spectroscopy of Adsorbed Probe Molecules for Analyzing the Surface Properties of Supported Pt (Pd) Catalysts

“…The concentration of surface OH groups in -Al 2 O 3 was determined from the integral intensities of absorption bands H in the region of 3650-3800 cm -1 using the integral absorption coefficient A 0 = 5.3 cm/mol (Baumgarten et al, 1989).…”

Polymer nanocomposites for high-temperature composite repair

“…In many systems, nanocomposites have been shown to have increased thermal stability and mechanical performance (strength, stiffness and dimensional stability) compared to neat resin [34][35][36][37][38][39][40]. Compared with many other nano-fillers, alumina nanoparticles are low cost and can be functionalized for nanocomposite fabrication [41 ].…”

“…The TG curves of alumina and silica nanoparticles in Figure 3-4 are divided into 3 regimes: below 100 °C, between 100 °C and 450 °C, and above 450 °C. The measured mass loss values are list in [34,35]. The high temperature drying process helps to reduce the water content of the nanoparticles, but dried alumina quickly adsorb moisture during preparation of pellets for FT-IR and contain more physically adsorbed water and hydroxyl groups than silica nanoparticles.…”