Meso- and Macroporous Co3O4 Nanorods for Effective VOC Gas Sensors

被引：267

作者：

Hoa Nguyen ^{[1
]}

El-Safty, Sherif A. ^{[1
,2
]}

机构：

[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

[2] Waseda Univ, Grad Sch Adv Sci & Engn, Shinjuku Ku, Tokyo 1698555, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2011年 / 115卷 / 17期

关键词：

HYDROTHERMAL SYNTHESIS; PERFORMANCE; HYDROGEN; ETHANOL; NO2;

D O I：

10.1021/jp1116189

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：

The synthesis of crystalline nanorod metal oxides with porous structure is an important issue in gas sensor technology, which aims to increase their sensitivity and stability. In addition, the development of a facile method to synthesize large yields of nanorods is a key factor in reducing the cost of products in thick film gas sensor technology. Large yields of crystalline meso-/macroporous Co3O4 nanorods are fabricated using facile hydrothermal method from CoCl2 and urea precursors, without using any surfactants or template-directing agents. The gas-sensing properties of synthesized nanorods are tested to volatile organic compounds (VOCs) such as benzene, acetone, and ethanol. Results reveal that crystalline meso- and macroporous Co3O4 nanorods have the highest sensitivity to acetone with a fast response and a recovery time of one minute. Moreover, the sensing properties of crystalline meso-/macroporous Co3O4 nanorods depend strongly on carrier (reference) gases, whereas preadsorbed oxygen plays an important role in the sensing mechanism of Co3O4-based nanorod sensors for VOCs.

引用

收藏

页码：8466 / 8474

页数：9

相关论文

共 32 条

[1] Air pollution, precipitation chemistry and forest health in the Retezat Mountains, Southern Carpathians, Romania [J].

Bytnerowicz, A ;

Badea, O ;

Popescu, F ;

Musselman, R ;

Tanase, M ;

Barbu, L ;

Fraczek, W ;

Gembasu, N ;

Surdu, A ;

Danescu, F ;

Postelnicu, D ;

Cenusa, R ;

Vasile, C .

ENVIRONMENTAL POLLUTION, 2005, 137 (03) :546-567

[2] The use of passive sampling to monitor forest exposure to O3, NO2 and SO2:: a review and some case studies [J].

Cox, RM .

ENVIRONMENTAL POLLUTION, 2003, 126 (03) :301-311

[3] Uniformly mesocaged cubic Fd3ml monoliths as modal carriers for optical chemosensors [J].

El-Safty, Sherif A. ;

Ismail, Adel A. ;

Matsunaga, Hideyuki ;

Nanjo, Hiroshi ;

Mizukami, Fujio .

JOURNAL OF PHYSICAL CHEMISTRY C, 2008, 112 (13) :4825-4835

[4] Oxide materials for development of integrated gas sensors - A comprehensive review [J].

Eranna, G ;

Joshi, BC ;

Runthala, DP ;

Gupta, RP .

CRITICAL REVIEWS IN SOLID STATE AND MATERIALS SCIENCES, 2004, 29 (3-4) :111-188

[5] Chemical synthesis, characterisation and gas sensing performance of copper oxide nanoribbons [J].

Gou, Xinglong ;

Wang, Guoxiu ;

Yang, Juan ;

Park, Jinsoo ;

Wexler, David .

JOURNAL OF MATERIALS CHEMISTRY, 2008, 18 (09) :965-969

[6] Solubility-controlled synthesis of high-quality Co3O4 nanocrystals [J].

He, T ;

Chen, DR ;

Jiao, XL ;

Wang, YL ;

Duan, YZ .

CHEMISTRY OF MATERIALS, 2005, 17 (15) :4023-4030

[7] Nanowire structured SnOx-SWNT composites: High performance sensor for NOx detection [J].

Hoa, Nguyen Duc ;

Quy, Nguyen Van ;

Kim, Dojin .

SENSORS AND ACTUATORS B-CHEMICAL, 2009, 142 (01) :253-259

[8] Selective Synthesis of Co3O4 Nanocrystal with Different Shape and Crystal Plane Effect on Catalytic Property for Methane Combustion [J].

Hu, Linhua ;

Peng, Qing ;

Li, Yadong .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2008, 130 (48) :16136-+

[9] Pt-loaded Al2O3 catalytic filters for screen-printed WO3 sensors highly selective to benzene [J].

Hubálek, J ;

Malysz, K ;

Prásek, J ;

Vilanova, X ;

Ivanov, P ;

Llobet, E ;

Brezmes, J ;

Correig, X ;

Sverák, Z .

SENSORS AND ACTUATORS B-CHEMICAL, 2004, 101 (03) :277-283

[10] General Synthesis of Large-Scale Arrays of One-Dimensional Nanostructured Co3O4 Directly on Heterogeneous Substrates [J].

Jiang, J. ;

Liu, J. P. ;

Huang, X. T. ;

Li, Y. Y. ;

Ding, R. M. ;

Ji, X. X. ;

Hu, Y. Y. ;

Chi, Q. B. ;

Zhu, Z. H. .

CRYSTAL GROWTH & DESIGN, 2010, 10 (01) :70-75

← 1 2 3 4 →