CO sensor based on thick films of 3D hierarchical CeO2 architectures

被引：46

作者：

Michel, Carlos R. ^{[1
]}

Martinez-Preciado, Alma H. ^{[2
]}

机构：

[1] Univ Guadalajara, Dept Fis, CUCEI, Guadalajara 44410, Jalisco, Mexico

[2] Univ Guadalajara, Dept Farmacobiol, CUCEI, Guadalajara 44410, Jalisco, Mexico

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2014年 / 197卷

关键词：

CeO2; 3D hierarchical architectures; Hollow spheres; Gas sensors; Impedance; GAS-SENSING PROPERTIES; CERIA; SPHERES; METAL; PARTICLES; SNO2;

D O I：

10.1016/j.snb.2014.02.090

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Hollow CeO2 microspheres, having 3D architectures on their surface, were prepared by a microwave-assisted coprecipitation method. By this method, ceric ammonium nitrate was diluted in formic acid. The application of microwave irradiation produced the precipitation of a white powder, with the simultaneous emission of NO2. At low temperature, cerium formate was formed; whereas from 400 degrees C, CeO2 with cubic crystal structure was identified. The morphology of the samples calcined from 170 to 600 degrees C was of hollow microspheres, with size between 1.5 and 10 mu m. Their surface displayed unique 3D architectures, which consisted of ramifications formed by the assembly of nanograins and nanoporous. Microwave irradiation played a key role in the formation of 3D hollow architectures. The effect of the concentration of ceric ammonium nitrate on the particle morphology was also investigated. Thick films were prepared by depositing a suspension of the CeO2 powder on alumina substrates. The electrical characterization in gases was performed in alternating current (AC). The films exhibited a reliable and quantitative detection of carbon monoxide from 250 degrees C. The effect of the applied frequency and the operating temperature was analyzed. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：177 / 184

页数：8

共 39 条

[21] Gas sensing properties of Nd2O3 nanostructured microspheres [J].

Michel, Carlos R. ;

Martinez-Preciado, Alma H. ;

Lopez Contreras, Narda L. .

SENSORS AND ACTUATORS B-CHEMICAL, 2013, 184 :8-14

[22] Gas sensing properties of Gd2O3 microspheres prepared in aqueous media containing pectin [J].

Michel, Carlos R. ;

Lopez-Contreras, Narda L. ;

Martinez-Preciado, Alma H. .

SENSORS AND ACTUATORS B-CHEMICAL, 2013, 177 :390-396

[23] Effect of the frequency on the gas sensing response of CoSb2O6 prepared by a colloidal method [J].

Michel, Carlos R. ;

Martinez-Preciado, Alma H. ;

Moran-Lazaro, Juan R. .

SENSORS AND ACTUATORS B-CHEMICAL, 2009, 140 (01) :149-154

[24] Microwave-Assisted Green Synthesis of Silver Nanostructures [J].

Nadagouda, Mallikarjuna N. ;

Speth, Thomas F. ;

Varma, Rajender S. .

ACCOUNTS OF CHEMICAL RESEARCH, 2011, 44 (07) :469-478

[25] Room temperature synthesis of crystalline CeO2 nanopowder: Advantage of sonochemical method over conventional method [J].

Pinjari, Dipak Vitthal ;

Pandit, Aniruddha Bhalchandra .

ULTRASONICS SONOCHEMISTRY, 2011, 18 (05) :1118-1123

[26] Template synthesis and photocatalytic properties of porous metal oxide spheres formed by nanoparticle infiltration [J].

Shchukin, DG ;

Caruso, RA .

CHEMISTRY OF MATERIALS, 2004, 16 (11) :2287-2292

[27] Nanostructured ceria-based materials: synthesis, properties, and applications [J].

Sun, Chunwen ;

Li, Hong ;

Chen, Liquan .

ENERGY & ENVIRONMENTAL SCIENCE, 2012, 5 (09) :8475-8505

[28] Synthesis of nanocrystalline CeO2 particles by different emulsion methods [J].

Supakanapitak, Sunisa ;

Boonamnuayvitaya, Virote ;

Jarudilokkul, Somnuk .

MATERIALS CHARACTERIZATION, 2012, 67 :83-92

[29] Cerium oxide nanotubes prepared from cerium hydroxide nanotubes [J].

Tang, CC ;

Bando, Y ;

Liu, BD ;

Golberg, D .

ADVANCED MATERIALS, 2005, 17 (24) :3005-+

[30] Catalytic properties of ceria and CeO2-containing materials [J].

Trovarelli, A .

CATALYSIS REVIEWS-SCIENCE AND ENGINEERING, 1996, 38 (04) :439-520

← 1 2 3 4 →