2009
DOI: 10.1021/jp907665r
|View full text |Cite
|
Sign up to set email alerts
|

On the Enhanced Solute Content, Shape, Defect Microstructures, and Optical Properties of Ti-Doped γ-Al2O3 Nanocondensates

Abstract: The γ-Al2O3 condensates with increased solid solubility (up to ca. 4 atomic %) of Ti, mainly Ti3+ and minor Ti2+/Ti4+ according to X-ray photoelectron spectroscopy, were synthesized by laser ablation condensation in air. Transmission electron microscopy indicated that the nearly spherical condensates were nano- to submicrometer in size having {111} facets for mutual coalescence to form twin or single crystals. The Ti-doped γ-Al2O3 condensates are vulnerable to electron irradiation by forming pits bound by {111… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
3
1
1

Citation Types

3
10
0

Year Published

2010
2010
2023
2023

Publication Types

Select...
5

Relationship

1
4

Authors

Journals

citations
Cited by 11 publications
(13 citation statements)
references
References 32 publications
3
10
0
Order By: Relevance
“…solid solubility in W-ZnO nanocondensates can be rationalized by the capillarity effect analogous to our previously studied case of Ni-dissolved TiO 2 nanospheres and Ti dissolution in c-Al 2 O 3 nanocondensates [10,11]. In this connection, particle size Fig.…”
Section: Enhanced Si Incorporation In Znosupporting
confidence: 64%
See 1 more Smart Citation
“…solid solubility in W-ZnO nanocondensates can be rationalized by the capillarity effect analogous to our previously studied case of Ni-dissolved TiO 2 nanospheres and Ti dissolution in c-Al 2 O 3 nanocondensates [10,11]. In this connection, particle size Fig.…”
Section: Enhanced Si Incorporation In Znosupporting
confidence: 64%
“…The dynamic PLA process, as adopted in this study for the enhanced Si doping in ZnO, was even more powerful to raise the solid solubility for some oxide particles, such as Ni-doped rutile TiO 2 and Ti-doped c-Al 2 O 3 although they were vulnerable upon electron irradiation [10,11]. W-ZnO in the form of thin film with a high concentration of MgO in solid solution has been fabricated by PLA [12][13][14], presumably under the pressure effect in view of static compression results of bulk materials [15].…”
Section: Introductionmentioning
confidence: 99%
“…The {111} face being cation–anion unmixed and without such chain, yet with close-packed oxygen atoms, is less stable for the present magnetite. (The {001}, {110}, and {111} have 2, 1 and 0 PBCs, respectively, in terms of the edge-shared octahedral [[ 46 ]] for the case of the spinel-type isostructure.)…”
Section: Discussionmentioning
confidence: 99%
“…However, maintaining a sufficiently high concentration of Ti 3þ is challenging because it is easily oxidized. Several strategies, such as oxidizing the doped Ti 2þ (e.g., TiH 2 or TiO) in TiO 2 [14e16], combusting the mixed Ti 2 O 3 and TiO 2 in air [17], heating TiO 2 under reducing conditions (e.g., H 2 , Zn, or urea) [18,19], high energetic particle bombardment [20,21], and electrochemical reduction [22], have been explored to increase the concentration of Ti 3þ in TiO 2 . However, nearly all of these methods do not attempt to preserve the Ti 3þ concentration throughout the synthesis (i.e., from the initial preparation to the final products).…”
Section: Introductionmentioning
confidence: 99%
“…Therefore, excess water can result in harmful oxidation of Ti 3þ even with mild heating [26]. In addition, the current methods of oxidizing titanium metal to prepare TiO 2 -based materials containing a sufficiently high concentration of Ti 3þ are primarily based on high energy particle bombardment, such as laser pulse irradiation, to evaporate the titanium target in a vacuum with a moderate amount of water vapor remaining [20,21]. Although high energy consumption and difficult operation are the limitations for practical applications, this approach for constructing a competitive oxidation and anti-oxidation system using water vapor and a vacuum environment to oxidize metal titanium and protect Ti 3þ is helpful in overcoming the challenges of Ti 3þ oxidation during acid dissolution.…”
Section: Introductionmentioning
confidence: 99%