Structural effects of codoping of Nb and Sc in titanium dioxide nanoparticles

被引：24

作者：

Ahmad, Akhlaq ^{[1
]}

Shah, Jawad Ali ^{[1
]}

Buzby, Scott ^{[2
]}

Shah, Syed Ismat ^{[2
,3
]}

机构：

[1] Univ Engn & Technol, Dept Met & Mat Engn, Lahore, Pakistan

[2] Univ Delaware, Dept Mat Sci & Engn, Newark, DE 19716 USA

[3] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA

来源：

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY | 2008年 / 06期

关键词：

TiO2; nanostructures; sol-gel processes; calcination; niobium; scandium;

D O I：

10.1002/ejic.200701012

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Nanoparticles of TiO2 codoped with 0.5, 0.75, and 1 atom-% Nb and Sc each were synthesized by sol-gel technique. After drying, as-synthesized samples were calcined at temperatures ranging from 250-900 degrees C. Changes in phase transformation of the doped samples with reference to dopant concentration and calcination temperature have been studied. The samples were analyzed by various analytical tools such as XRD, SEM, TEM, XPS, and EDS. The XRD results indicate that the presence of Nb and Sc substitutional ions in the anatase crystal structure inhibits the phase transition and growth of the nanoparticles with an increase in temperature. The XPS results indicate the incorporation of Nb as Nb2O5 and Sc as SC2O3. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008).

引用

页码：948 / 953

页数：6

共 23 条

[1] Structural effects of niobium and silver doping on titanium dioxide nanoparticles [J].

Ahmad, A. ;

Thiel, J. ;

Shah, S. Ismat .

PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON NANOSCIENCE AND TECHNOLOGY, 2007, 61 :11-15

[2] Effects of Nb doping on the TiO2 anatase-to-rutile phase transition [J].

Arbiol, J ;

Cerdà, J ;

Dezanneau, G ;

Cirera, A ;

Peiró, F ;

Cornet, A ;

Morante, JR .

JOURNAL OF APPLIED PHYSICS, 2002, 92 (02) :853-861

[3]

Barakat M. A., 2005, J NANOSCI NANOTECHNO, VX, P1

[4] Photocatalytic degradation of 2-chlorophenol by co-doped TiO2 nanoparticles [J].

Barakat, MA ;

Schaeffer, H ;

Hayes, G ;

Ismat-Shah, S .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2005, 57 (01) :23-30

[5]

BURNS A, 2004, MAT SCI ENG B, V9793, P1

[6]

BURNS A, 2002, MAT RES SOC S P

[7] Effect of silver doping on the phase transformation and grain growth of sol-gel titania powder [J].

Chao, HE ;

Yun, YU ;

Xingfang, HU ;

Larbot, A .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2003, 23 (09) :1457-1464

[8] SURFACE-ACIDITY AND PHOTOCATALYTIC ACTIVITY OF NB2O5/TIO2 PHOTOCATALYSTS [J].

CUI, H ;

DWIGHT, K ;

SOLED, S ;

WOLD, A .

JOURNAL OF SOLID STATE CHEMISTRY, 1995, 115 (01) :187-191

[9] L2,3 X-RAY-ABSORPTION EDGES OF D0 COMPOUNDS - K+, CA-2+, SC-3+ AND TI-4+ IN OH (OCTAHEDRAL) SYMMETRY [J].

DEGROOT, FMF ;

FUGGLE, JC ;

THOLE, BT ;

SAWATZKY, GA .

PHYSICAL REVIEW B, 1990, 41 (02) :928-937

[10]

Fujishima A., 2000, Journal of Photochemistry and Photobiology C: Photochemistry Reviews, V1, P1, DOI [10.1016/S1389-5567(00)00002-2, DOI 10.1016/S1389-5567(00)00002-2]

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