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

[1] MoO3-based sensor for NO, NO2 and CH4 detection [J].

Barazzouk, S. ;

Tandon, R. P. ;

Hotchandani, S. .

SENSORS AND ACTUATORS B-CHEMICAL, 2006, 119 (02) :691-694

[2]

Byrappa K., 2001, HDB HYDROTHERMAL TEC

[3] Self-assembly of molybdite nanoribbons [J].

Camacho-Bragado, GA ;

Jose-Yacaman, M .

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2006, 82 (01) :19-22

[4] Homogeneous precipitation of cerium dioxide nanoparticles in alcohol/water mixed solvents [J].

Chen, HI ;

Chang, HY .

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2004, 242 (1-3) :61-69

[5] Selective synthesis of metastable MoO2 nanocrystallites through a solution-phase approach [J].

Chen, XY ;

Zhang, ZJ ;

Li, XX ;

Shi, CW ;

Li, XL .

CHEMICAL PHYSICS LETTERS, 2006, 418 (1-3) :105-108

[6] Gas sensing properties of MoO3 nanorods to CO and CH3OH [J].

Comini, E ;

Yubao, L ;

Brando, Y ;

Sberveglieri, G .

CHEMICAL PHYSICS LETTERS, 2005, 407 (4-6) :368-371

[7] Solvothermal synthesis of microcrystallites of transition metal oxides [J].

Demazeau, G ;

Millet, JM ;

Cros, C ;

Largeteau, A .

JOURNAL OF ALLOYS AND COMPOUNDS, 1997, 262 :271-274

[8] ON THE SURFACE-STRUCTURE OF MOO3 CRYSTALS USED IN CATALYTIC-OXIDATION OF HYDROCARBONS [J].

DOMINGUEZESQUIVEL, JM ;

FUENTESMOYADO, S ;

DIAZGUERRERO, G ;

VAZQUEZZAVALA, A .

SURFACE SCIENCE, 1986, 175 (01) :L701-L706

[9] MoO3-based sputtered thin films for fast NO2 detection [J].

Ferroni, M ;

Guidi, V ;

Martinelli, G ;

Sacerdoti, M ;

Nelli, P ;

Sberveglieri, G .

SENSORS AND ACTUATORS B-CHEMICAL, 1998, 48 (1-3) :285-288

[10] Low temperature preparation of nanocrystalline Mn2O3 via ethanol-thermal reduction of MnO2 [J].

He, WL ;

Zhang, YC ;

Zhang, XX ;

Wang, H ;

Yan, H .

JOURNAL OF CRYSTAL GROWTH, 2003, 252 (1-3) :285-288

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