Active TiO2 nanotubes for CO oxidation at low temperature

被引：28

作者：

Camposeco, R. ^{[1
]}

Castillo, S. ^{[1
,2
]}

Mejia, I. ^{[1
]}

Mugica, V. ^{[3
]}

Carrera, R. ^{[2
]}

Montoya, A. ^{[1
]}

Moran-Pineda, M. ^{[1
]}

Navarrete, J. ^{[1
]}

Gomez, R. ^{[4
]}

机构：

[1] Mexican Inst Petr, Mol Engn Program, Mexico City, DF, Mexico

[2] ESIQIE IPN, Dept Alloy Engn, Mexico City, DF, Mexico

[3] UAM A, Dept Chem, Mexico City, DF, Mexico

[4] UAM I, Dept Chem, Mexico City, DF, Mexico

来源：

CATALYSIS COMMUNICATIONS | 2012年 / 17卷

关键词：

Titania; Nanocrystals; Nanotubes; Sol-gel method; Hydrothermal treatment; CO oxidation; TITANATE NANOTUBES; ANATASE; SPECTROSCOPY; MOISTURE; WATER; FTIR;

D O I：

10.1016/j.catcom.2011.10.022

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：

In this study we report the formation of nanocrystals and nanotubes of TiO2 synthesized by the sol-gel method and hydrothermal treatment respectively. The obtained TiO2 nanostructures were characterized by XRD, BET, TEM, UV-vis, XPS and FTIR; and evaluated in the CO oxidation. As for the nanotube-based samples, two catalysts were prepared (NTB5 and NTB10) through the hydrothermal treatment of nanosized titania in NaOH (5 and 10N) at 160 degrees C, followed by HCl rinsing until pH 1 was reached. From both catalysts, NTB10 showed the highest surface area (290 m(2)/g), nanocrystals (15 nm) and stable phase (H2Ti3O7) with a high CO oxidation capacity. We found that the band gap for NTB10 catalyst was of 2.85 eV, the lowest value respect to that of NTB5 and SGTB3 catalyst, based material (SGTB) showed both the lowest textural properties and catalytic performance. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：81 / 88

页数：8

共 45 条

[1] Semiconductor clusters, nanocrystals, and quantum dots [J].

Alivisatos, AP .

SCIENCE, 1996, 271 (5251) :933-937

[2] TiO2-B nanowires [J].

Armstrong, AR ;

Armstrong, G ;

Canales, J ;

Bruce, PG .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2004, 43 (17) :2286-2288

[3] The effect of hydrothermal conditions on the mesoporous structure of TiO2 nanotubes [J].

Bavykin, DV ;

Parmon, VN ;

Lapkin, AA ;

Walsh, FC .

JOURNAL OF MATERIALS CHEMISTRY, 2004, 14 (22) :3370-3377

[4] Photodecomposition of NO by sol-gel TiO2 catalysts under atmospheric conditions:: Effect of the method on the textural and morphologic properties [J].

Carrera, R. ;

Vazquez, A. L. ;

Arce, E. ;

Moran-Pineda, M. ;

Castillo, S. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2007, 434 (SPEC. ISS.) :788-791

[5]

Chen Q, 2002, ADV MATER, V14, P1208, DOI 10.1002/1521-4095(20020903)14:17<1208::AID-ADMA1208>3.0.CO

[6]

2-0

[7] Structure and applications of titanate and related nanostructures [J].

Chen, Q. ;

Peng, L-M. .

INTERNATIONAL JOURNAL OF NANOTECHNOLOGY, 2007, 4 (1-2) :44-65

[8] The structure of trititanate nanotubes [J].

Chen, Q ;

Du, GH ;

Zhang, S ;

Peng, LM .

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 2002, 58 :587-593

[9]

Chen Q, 2002, CHEMINFORM, V33, P219

[10] Infrared spectroscopy of the TiO2/aqueous solution interface [J].

Connor, PA ;

Dobson, KD ;

McQuillan, AJ .

LANGMUIR, 1999, 15 (07) :2402-2408

← 1 2 3 4 5 →