X-Ray Diffraction, FTIR, and NMR Characterization of Sol–Gel Alumina Doped with Lanthanum and Cerium

Espinoza-Vázquez, Araceli; López, T.; Gómez, R.; Bokhimi,; Morales, A.; Novaro, O.

doi:10.1006/jssc.1996.7135

Cited by 115 publications

(61 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Stabilization of γ-Al 2 O 3 by La is often suggested to be due to LaAlO 3 or La 2 O 3 monolayers on the surface, and the debate about the formation of one phase over another is still ongoing 10,11,12,13,14,15 . We explored the possibility of clustering of surface La atoms.…”

mentioning

confidence: 99%

Dopants adsorbed as single atoms prevent degradation of catalysts

et al. 2004

View full text Add to dashboard Cite

mentioning

confidence: 99%

Dopants adsorbed as single atoms prevent degradation of catalysts

et al. 2004

View full text Add to dashboard Cite

“…The broad absorption peaks at 3461 and 1629 cm -1 are attributed to the O-H vibration of water. The bands observed at 1035, 750 and 514 cm -1 are produced by the Al-O bonds (Vazquez et al 1997;Shek et al 1997). …”

Section: Characterizationmentioning

confidence: 95%

A comparative study on particle–fluid interactions in micro and nanofluids of aluminium oxide

Hemalatha

Prabhakaran

Nalini

2010

Microfluid Nanofluid

View full text Add to dashboard Cite

Stable dispersions of micro and nanosized Al 2 O 3 particles in ethylene glycol are prepared with the aid of sonication. The temperature dependant acoustic properties such as ultrasonic velocity, adiabatic compressibility, attenuation and acoustic impedance are studied and reported in this paper. In microfluids the particle-fluid interaction is observed to decrease with increase of concentration of particles whereas in nanofluids it is observed to increase up to the critical concentration (0.6 Wt%) and above which the particle-particle interaction dominates due to agglomeration of particles. A range of concentration with significant particle-fluid interaction is identified for effective nanofluid applications.

show abstract

“…The -OH region (3900-3200 cm −1 ) in Pmodified aluminas were reported including the vibration of Al (IV, VI)-OH and P-OH bands [22], where contained a complex of four to seven closely overlapped bands that attributed to the free or quasi-free surface OH groups for transition aluminas [34]. The band at 1644 cm −1 was generated by the stretching vibration of the OH − ions of residual water [35]. tively the most sensitive 8a mode of vibration of two different Py adsorbed species.…”

Section: Surface Chemistrymentioning

confidence: 96%