Gas sensing properties of MoO3 nanoparticles synthesized by solvothermal method

被引：126

作者：

Kim, Won-Sik ^{[1
]}

Kim, Hong-Chan ^{[1
]}

Hong, Seong-Hyeon ^{[1
]}

机构：

[1] Seoul Natl Univ, RIAM, Dept Mat Sci & Engn, Seoul 151742, South Korea

来源：

JOURNAL OF NANOPARTICLE RESEARCH | 2010年 / 12卷 / 05期

关键词：

Solvothermal; Nanoparticle; MoO3; Gas sensor; H2S; THIN-FILMS; HYDROTHERMAL SYNTHESIS; CATALYTIC-OXIDATION; FIELD-EMISSION; MOLYBDENUM; OXIDE; H2S; NANOBELTS; ETHANOL; MICROCRYSTALLITES;

D O I：

10.1007/s11051-009-9751-6

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

MoO3 nanoparticles were prepared by thermally oxidizing the MoO2 nano-crystallites synthesized by solvothermal reaction, and their gas sensing properties were investigated. Ethanol and water mixed solvents were used in the solvothermal synthesis, and it was observed that the phase, size, and morphology of the products were strongly dependent on the composition of solvents. Well-crystallized and spherical MoO2 nano-crystallites similar to 20 nm) were obtained in the mixed solvent (water:ethanol = 40:10 in vol), and subsequent heat treatment at 450 A degrees C produced the well-separated, slightly elongated MoO3 nano-particles of similar to 100 nm. The nano-particle MoO3 gas sensor responded to both oxidizing and reducing gases, but it exhibited the extremely high gas response toward H2S with a short response time (< 10 s). In particular, the magnitude of gas response of nano-particle MoO3 gas sensor was about 10 times higher than that of micron-sized commercial MoO3 powder sensor at 20 ppm H2S.

引用

页码：1889 / 1896

页数：8

共 49 条

[21] PARTIAL OXIDATION OF METHANE BY NITROUS-OXIDE OVER MOLYBDENUM ON SILICA [J].

LIU, HF ;

LIU, RS ;

LIEW, KY ;

JOHNSON, RE ;

LUNSFORD, JH .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1984, 106 (15) :4117-4121

[22] Size-controlled synthesis and characterization of quantum-size SnO2 nanocrystallites by a solvothermal route [J].

Liu, Yang ;

Yang, Fan ;

Yang, Xiurong .

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2008, 312 (2-3) :219-225

[23] Gas sensing response of NiO nanoparticle films made by reactive gas deposition [J].

Luyo, C. ;

Ionescu, R. ;

Reyes, L. F. ;

Topalian, Z. ;

Estrada, W. ;

Llobet, E. ;

Granqvist, C. G. ;

Heszler, P. .

SENSORS AND ACTUATORS B-CHEMICAL, 2009, 138 (01) :14-20

[24] Gas-sensing properties of Ta-doped MoO3-x [J].

Merdrignac-Conanec, O ;

Moseley, PT .

ELECTROCHEMISTRY COMMUNICATIONS, 1999, 1 (02) :51-54

[25] Sputtered molybdenum oxide thin films for NH3 detection [J].

Mutschall, D ;

Holzner, K ;

Obermeier, E .

SENSORS AND ACTUATORS B-CHEMICAL, 1996, 36 (1-3) :320-324

[26] Synthesis and characterization of novel nanoscopic molybdenum oxide fibers [J].

Niederberger, M ;

Krumeich, F ;

Muhr, HJ ;

Müller, M ;

Nesper, R .

JOURNAL OF MATERIALS CHEMISTRY, 2001, 11 (07) :1941-1945

[27] One-step synthesis of submicrometer fibers of MoO3 [J].

Patzke, GR ;

Michailovski, A ;

Krumeich, F ;

Nesper, R ;

Grunwaldt, JD ;

Baiker, A .

CHEMISTRY OF MATERIALS, 2004, 16 (06) :1126-1134

[28] TRAPPED ELECTRONS IN SUBSTOICHIOMETRIC MOO3 OBSERVED BY X-RAY ELECTRON-SPECTROSCOPY [J].

RABALAIS, JW ;

COLTON, RJ ;

GUZMAN, AM .

CHEMICAL PHYSICS LETTERS, 1974, 29 (01) :131-133

[29] Hydrothermal synthesis of MoO3 nanobelts utilizing poly(ethylene glycol) [J].

Reddy, Ch. V. Subba ;

Walker, Edwin H., Jr. ;

Wen, Chen ;

Mho, Sun-il .

JOURNAL OF POWER SOURCES, 2008, 183 (01) :330-333

[30] Bulk structural investigation of the reduction of MoO3 with propene and the oxidation of MoO2 with oxygen [J].

Ressler, T ;

Wienold, J ;

Jentoft, RE ;

Neisius, T .

JOURNAL OF CATALYSIS, 2002, 210 (01) :67-83

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