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Synthesis and functionalization of s...

Rabuffetti, Federico A.

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Synthesis and functionalization of size- and shape-controlled strontium titanate nanoparticles.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Synthesis and functionalization of size- and shape-controlled strontium titanate nanoparticles./
Author:	Rabuffetti, Federico A.
Description:	267 p.
Notes:	Source: Dissertation Abstracts International, Volume: 71-05, Section: B, page: 3054.
Contained By:	Dissertation Abstracts International71-05B.
Subject:	Chemistry, Inorganic. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3402239
ISBN:	9781109742404

Synthesis and functionalization of size- and shape-controlled strontium titanate nanoparticles.
Rabuffetti, Federico A.

Synthesis and functionalization of size- and shape-controlled strontium titanate nanoparticles. - 267 p.

Source: Dissertation Abstracts International, Volume: 71-05, Section: B, page: 3054.

Thesis (Ph.D.)--Northwestern University, 2010.

Size- and shape-controlled SrTiO3 nanoparticles were synthesized using two different approaches: molten salt and sol-precipitation--hydrothermal treatment. As-prepared nanoparticles were characterized chemically, structurally, and morphologically at both the bulk and surface levels. SrTiO3 samples synthesized via molten salt and sol-precipitation--hydrothermal treatment consisted of nonporous, single-crystalline, cubic-shaped nanoparticles having the (100) crystal planes primarily exposed, average edge lengths of 120 and 60 nm, and surface areas of 10 and 20 m2/g, respectively. Nanoparticles obtained via sol-precipitation--hydrothermal treatment exhibited narrower particle size distribution, regular and uniform cubic shape, and reduced interparticle agglomeration. A comparative study of the surface acidity showed rather slight differences between SrTiO3 nanoparticles synthesized using different approaches, with a mixture of SrO-based and TiO-based terminations observed in all cases.

ISBN: 9781109742404Subjects--Topical Terms:

517253
Chemistry, Inorganic.

Synthesis and functionalization of size- and shape-controlled strontium titanate nanoparticles.
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035 $a (UMI)AAI3402239
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100 1 $a Rabuffetti, Federico A. $3 1675022
245 1 0 $a Synthesis and functionalization of size- and shape-controlled strontium titanate nanoparticles.
300 $a 267 p.
500 $a Source: Dissertation Abstracts International, Volume: 71-05, Section: B, page: 3054.
500 $a Advisers: Kenneth R. Poeppelmeier; Peter C. Stair.
502 $a Thesis (Ph.D.)--Northwestern University, 2010.
520 $a Size- and shape-controlled SrTiO3 nanoparticles were synthesized using two different approaches: molten salt and sol-precipitation--hydrothermal treatment. As-prepared nanoparticles were characterized chemically, structurally, and morphologically at both the bulk and surface levels. SrTiO3 samples synthesized via molten salt and sol-precipitation--hydrothermal treatment consisted of nonporous, single-crystalline, cubic-shaped nanoparticles having the (100) crystal planes primarily exposed, average edge lengths of 120 and 60 nm, and surface areas of 10 and 20 m2/g, respectively. Nanoparticles obtained via sol-precipitation--hydrothermal treatment exhibited narrower particle size distribution, regular and uniform cubic shape, and reduced interparticle agglomeration. A comparative study of the surface acidity showed rather slight differences between SrTiO3 nanoparticles synthesized using different approaches, with a mixture of SrO-based and TiO-based terminations observed in all cases.
520 $a Functionalization of the surface of SrTiO3 nanoparticles obtained via sol-precipitation--hydrothermal treatment was attempted via thermal and chemical--thermal treatments of the SrTiO3 surface, and via deposition of platinum clusters using SrTiO3 nanoparticles as support. Thermal and chemical treatments consisted of high-temperature annealing under oxidizing atmosphere and acid lixiviation of the SrO surface layers, respectively. These treatments had opposite effects on the chemical composition of the surface: high-temperature annealing resulted in Sr-enrichment, whereas acid lixiviation produced Tienriched surfaces. From the standpoint of the morphology, the stabilization of the (110) relative to the (100) crystal plane was observed upon annealing at high temperatures.
520 $a Platinum nanoparticles were deposited on SrTiO3 nanoparticles via atomic layer deposition. Their chemical composition, morphology, and catalytic activity for propane oxidation were investigated. Platinum nanoparticles consisted of a mixture of Pt0 and PtIIO, the latter species becoming predominant as the particle size decreases. They exhibited sizes ranging from 1 to 5 nm, single-crystalline character, and excellent spatial dispersion over the support. Finally, their catalytic performance for propane oxidation was significantly superior to that of a standard Pt/gamma-Al 2O3 catalyst, in terms of both activity and stability.
520 $a Results presented in this Thesis demonstrate that synthetic approaches based on soft chemistry coupled to atomic layer deposition offer potential for the preparation of metal oxide--metal nanoparticles with homogeneous and well-defined chemical composition, structure, and morphology at both the bulk and surface levels.
590 $a School code: 0163.
650 4 $a Chemistry, Inorganic. $3 517253
650 4 $a Chemistry, Physical. $3 560527
650 4 $a Engineering, Materials Science. $3 1017759
690 $a 0488
690 $a 0494
690 $a 0794
710 2 $a Northwestern University. $b Chemistry. $3 1030729
773 0 $t Dissertation Abstracts International $g 71-05B.
790 1 0 $a Poeppelmeier, Kenneth R., $e advisor
790 1 0 $a Stair, Peter C., $e advisor
790 1 0 $a Weitz, Eric $e committee member
790 1 0 $a Kanatzidis, Mercouri G. $e committee member
790 $a 0163
791 $a Ph.D.
792 $a 2010
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3402239