Preparation and Characterization of Al2O3–TiO2Composite Oxide Nanocrystals

Xiong, Gang; Wang, Xin; Lu, Lude; Yang, Xin; Xu, Yang

doi:10.1006/jssc.1998.7917

Cited by 25 publications

(15 citation statements)

References 18 publications

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“…The DTA graph shows an endothermic peak in the vicinity of 79 • C accompanied in the TG graph by a weight loss, which is attributed to the removal of adsorbed water and alcohol. It can be seen that the DTA curve of the gel shows a broad endothermic peak at about 104 • C, indicates the melting of the gel [18].…”

Section: Influence Of Acetic Acidmentioning

confidence: 98%

Synthesis, FT-IR and X-ray diffraction investigations of gadolinium-substituted pyrochlore oxide Gd1.82Cs0.18Ti2O6.82 via a sol–gel process

Garbout

Bouattour

Ellouze

et al. 2006

Journal of Alloys and Compounds

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Section: Influence Of Acetic Acidmentioning

confidence: 98%

Synthesis, FT-IR and X-ray diffraction investigations of gadolinium-substituted pyrochlore oxide Gd1.82Cs0.18Ti2O6.82 via a sol–gel process

Garbout

Bouattour

Ellouze

et al. 2006

Journal of Alloys and Compounds

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“…Many previous reports have shown that polymers such as PEG (poly(ethylene glycol)) [25][26][27][28], PVP (polyvinyl pyrrolidone) [29,30], and PAM (polyacrylamide) [31] are useful components in the formation of one-and zero-dimension nanosized materials. Some studies have investigated the preparation of nanomaterials such as ZnO [25,29,31], MoO 2 whiskers [26], and Al 2 O 3 -TiO 2 composite nanoparticles [27] using polymer-assisted synthesis. PEG-assisted HA nanoparticle synthesis was reported by Tseng et al [28], while metal nanoparticle synthesis in the presence of polymer was reported by Jeon et al [30].…”

Section: Introductionmentioning

confidence: 99%

Polymer‐Assisted Hydrothermal Synthesis of Hierarchically Arranged Hydroxyapatite Nanoceramic

Nathanael

Han

2013

Journal of Nanomaterials

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Flower-like hydroxyapatite (HA) nanostructures were synthesized by a polymer-assisted hydrothermal method. The thickness of the petals/plates decreased from 200 nm to 40 nm as the polymer concentration increased. The thickness also decreased as the hydrothermal treatment time increased from 6 to 12 hr. The HRTEM and SAED patterns suggest that the floral-like HA nanostructures are single crystalline in nature. Structural analysis based on XRD and Raman experiments implied that the produced nanostructure is a pure form of HA without any other impurities. The possible formation mechanism was discussed for the formation of flower-like HA nanostructures during polymer-assisted hydrothermal synthesis. Finally,in vitrocellular analysis revealed that the hierarchically arranged HA nanoceramic had improved cell viability relative to other structures. The cells were actively proliferated over these nanostructures due to lower cytotoxicity. Overall, the size and the crystallinity of the nanostructures played a role in improving the cell proliferation.

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“…Three older literature citations suggest that, under some conditions, titanium ions can be incorporated in the Al 2 O 3 crystal lattice. , One report 20 describes a plasma method of producing these materials. TiO 2 is also known to form a metastable line compound with Al 2 O 3 (Al 2 TiO 5 ) that readily equilibrates with equivalent mixtures of α-Al 2 O 3 and rutile. − All of these materials are potentially interesting from both catalyst support and photocatalyst perspectives.…”

Section: Introductionmentioning

confidence: 99%

Liquid-Feed Flame Spray Pyrolysis of Nanopowders in the Alumina−Titania System

et al. 2004

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We report here the synthesis of (TiO 2 ) x (Al 2 O 3 ) 1-x nanopowders with molar ratios that span the TiO 2 -Al 2 O 3 composition range. The nanopowders were synthesized using liquid-feed flame spray pyrolysis (LF-FSP) of mixtures of N(CH 2 CH 2 O) 3 TiOiPr (titanatrane isopropoxide) and N(CH 2 CH 2 O) 3 Al (alumatrane) dissolved in the appropriate molar ratios in alcohols used as solvent and fuel. Ethanol, methanol, and butanol were used in an attempt to regulate the flame temperatures, particle sizes, and size distributions, as well as to influence the phase(s) produced in selected mixed-phase materials produced at x ) 0.5. The as-produced powders were characterized in terms of phase, size, specific surface area, composition, and morphology by BET, XRD, SEM, TEM, and TGA-DTA. At compositions close to Al 2 O 3 , the δ phase is the primary phase observed. As the compositions approach x ) 0.5, a combination of rutile, R-Al 2 O 3 , and Al 2 TiO 5 is observed. Pure titania powders consist of 90:10 mixtures of anatase and rutile; however, doping with x ) 0.05 of alumina results in 40:60 anatase/rutile mixtures and nearly pure rutile phase at x ) 0.15. The source of this latter phase transformation can be explained in terms of Al 3+ substituting for Ti 4+ ions in the anatase lattice forcing the phase transformation as found in highly defective TiO 2 . No effect of flame temperature as a function of fuel was observed.

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Preparation and Characterization of Al2O3–TiO2Composite Oxide Nanocrystals

Cited by 25 publications

References 18 publications

Synthesis, FT-IR and X-ray diffraction investigations of gadolinium-substituted pyrochlore oxide Gd1.82Cs0.18Ti2O6.82 via a sol–gel process

Synthesis, FT-IR and X-ray diffraction investigations of gadolinium-substituted pyrochlore oxide Gd1.82Cs0.18Ti2O6.82 via a sol–gel process

Polymer‐Assisted Hydrothermal Synthesis of Hierarchically Arranged Hydroxyapatite Nanoceramic

Liquid-Feed Flame Spray Pyrolysis of Nanopowders in the Alumina−Titania System

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