Lanthanide-doped titanium dioxide layers as photocatalysts

被引：39

作者：

Uzunova-Bujnova, M. ^{[1
]}

Todorovska, R. ^{[2
]}

Dimitrov, D. ^{[1
]}

Todorovsky, D. ^{[1
]}

机构：

[1] Univ Sofia, Fac Chem, Dept Gen & Inorgan Chem, Sofia 1164, Bulgaria

[2] Bulgarian Acad Sci, Inst Elect, BU-1784 Sofia, Bulgaria

来源：

APPLIED SURFACE SCIENCE | 2008年 / 254卷 / 22期

关键词：

TiO2; photocatalysis; rare earths; sorption; thin films;

D O I：

10.1016/j.apsusc.2008.05.331

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Films (similar to 0.5 mg/cm(2)) from TiO2 doped with 1-10 mol% Ln(3+) (Ln = La or Gd) are deposited on different types of substrates by spray-pyrolysis using ethylene glycol solutions of Ti4+-Ln(3+) citric complexes as starting material and O-2 as a carrier gas. The films are post-deposition heated at 500 degrees C. Their phase composition, crystal structure, morphology, sorption ability and photocatalytic activity are studied. Aqueous solution of methylene blue is applied as a model pollutant. A film with 5 mol% La on Ti-coated stainless steel substrate shows significantly higher photocatalytic activity than the best performing samples produced from commercially available titania. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：7296 / 7302

页数：7

共 38 条

[1]

ARNAUDOV M, 1998, ANAL LAB, V7, P70

[2] Catalytic activity of La-modified TiO2 for soot oxidation by O2 [J].

Atribak, I. ;

Such-Basanez, I. ;

Bueno-Lopez, A. ;

Garcia Garcia, A. .

CATALYSIS COMMUNICATIONS, 2007, 8 (03) :478-482

[3] Photocatalytic degradation for environmental applications - a review [J].

Bhatkhande, DS ;

Pangarkar, VG ;

Beenackers, AACM .

JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY, 2002, 77 (01) :102-116

[4] Photoinduced reactivity of titanium dioxide [J].

Carp, O ;

Huisman, CL ;

Reller, A .

PROGRESS IN SOLID STATE CHEMISTRY, 2004, 32 (1-2) :33-177

[5] External and internal mass transfer effect on photocatalytic degradation [J].

Chen, DW ;

Li, FM ;

Ray, AK .

CATALYSIS TODAY, 2001, 66 (2-4) :475-485

[6] Titanium dioxide sol-gel deposited over glass and its application as a photocatalyst for water decontamination [J].

Gelover, S ;

Mondragón, P ;

Jiménez, A .

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2004, 165 (1-3) :241-246

[7] ENVIRONMENTAL APPLICATIONS OF SEMICONDUCTOR PHOTOCATALYSIS [J].

HOFFMANN, MR ;

MARTIN, ST ;

CHOI, WY ;

BAHNEMANN, DW .

CHEMICAL REVIEWS, 1995, 95 (01) :69-96

[8] Electronic band structure and photocatalytic activity of Ln2Ti2O7 (Ln = La, Pr, Nd) [J].

Hwang, DW ;

Lee, JS ;

Li, W ;

Oh, SH .

JOURNAL OF PHYSICAL CHEMISTRY B, 2003, 107 (21) :4963-4970

[9] The preparation and characterization of La doped TiO2 nanoparticles and their photocatalytic activity [J].

Jing, LQ ;

Sun, XJ ;

Xin, BF ;

Wang, BQ ;

Cai, WM ;

Fu, HG .

JOURNAL OF SOLID STATE CHEMISTRY, 2004, 177 (10) :3375-3382

[10] Photoluminescence of La/Ti mixed oxides prepared using sol-gel process and their pCBA photodecomposition [J].

Kim, Hong Rok ;

Lee, Tai Gyu ;

Shul, Yong-Gun .

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2007, 185 (2-3) :156-160

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