Porous LaFeO3/SnO2 nanocomposite film for CO2 detection with high sensitivity

被引：55

作者：

Zhang, Wan ^{[1
]}

Xie, Changsheng ^{[1
]}

Zhang, Guozhu ^{[2
]}

Zhang, Jian ^{[2
]}

Zhang, Shunping ^{[2
]}

Zeng, Dawen ^{[2
]}

机构：

[1] Huazhong Univ Sci & Technol, State Key Lab Mat Proc & Die & Mould Technol, 1037 Luoyu Rd, Wuhan 430074, Peoples R China

[2] Huazhong Univ Sci & Technol, Dept Mat Sci & Engn, Nanomat & Smart Sensors Res Lab, 1037 Luoyu Rd, Wuhan 430074, Peoples R China

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2017年 / 186卷

关键词：

Interfaces; Semiconductors; Heterostructures; X-ray photo-emission spectroscopy (XPS); MIXED-OXIDE CAPACITOR; SENSING PROPERTIES; CARBON-DIOXIDE; GAS SENSOR; CO2-SENSING CHARACTERISTICS; HYDROTHERMAL SYNTHESIS; THICK-FILMS; HETEROJUNCTIONS; MECHANISM; SURFACE;

D O I：

10.1016/j.matchemphys.2016.10.048

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Perovskite LaFeO3 nanocrystalline powder, synthesized by sol-gel method, was composited with SnO2 nanopowders to fabricate porous LaFeO3/SnO2 thick film sensors. The as-prepared sensors exhibit high gas sensitivity, fast response and low working temperature for CO2 detection. The optimal sensing performance of LaFeO3/SnO2 thick film sensors is obtained with the molar ratio of La/Sn = 1:1. The observed response is nearly 2 times higher than that of bare LaFeO3 at 4000 ppm CO2 and the response time is less than 20 s at 250 degrees C. CO2 sensing mechanism of the as-prepared nanocomposites porous film is addressed. The results demonstrate that the as-formed P-N junctions can greatly enhance the carrier transfer efficiency which is attributed to the improved sensing performance. Moreover, the hydroxyl species absorbed on the surface of the nanocomposites are also involved in the sensing process. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：228 / 236

页数：9

共 39 条

[1] ELECTRONIC-PROPERTIES OF TWO-DIMENSIONAL SYSTEMS [J].

ANDO, T ;

FOWLER, AB ;

STERN, F .

REVIEWS OF MODERN PHYSICS, 1982, 54 (02) :437-672

[2] Two-Dimensional Molybdenum Trioxide and Dichalcogenides [J].

Balendhran, Sivacarendran ;

Walia, Sumeet ;

Nili, Hussein ;

Ou, Jian Zhen ;

Zhuiykov, Serge ;

Kaner, Richard B. ;

Sriram, Sharath ;

Bhaskaran, Madhu ;

Kalantar-zadeh, Kourosh .

ADVANCED FUNCTIONAL MATERIALS, 2013, 23 (32) :3952-3970

[3] FT-IR surface study of nanosized ceramic materials used as gas sensors [J].

Baraton, MI .

SENSORS AND ACTUATORS B-CHEMICAL, 1996, 31 (1-2) :33-38

[4] Modeling of sensing and transduction for p-type semiconducting metal oxide based gas sensors [J].

Barsan, N. ;

Simion, C. ;

Heine, T. ;

Pokhrel, S. ;

Weimar, U. .

JOURNAL OF ELECTROCERAMICS, 2010, 25 (01) :11-19

[5] Large-scale, solution-phase growth of single-crystalline SnO2 nanorods [J].

Cheng, B ;

Russell, JM ;

Shi, WS ;

Zhang, L ;

Samulski, ET .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2004, 126 (19) :5972-5973

[6] Hydrothermal synthesis of SnO2 nanoparticles and their gas-sensing of alcohol [J].

Chiu, Hui-Chi ;

Yeh, Chen-Sheng .

JOURNAL OF PHYSICAL CHEMISTRY C, 2007, 111 (20) :7256-7259

[7] Neodymium Dioxide Carbonate as a Sensing Layer for Chemoresistive CO2 Sensing [J].

Djerdj, Igor ;

Haensch, Alexander ;

Koziej, Dorota ;

Pokhrel, Suman ;

Barsan, Nicolae ;

Weimar, Udo ;

Niederberger, Markus .

CHEMISTRY OF MATERIALS, 2009, 21 (22) :5375-5381

[8] Perovskite oxides for semiconductor-based gas sensors [J].

Fergus, Jeffrey W. .

SENSORS AND ACTUATORS B-CHEMICAL, 2007, 123 (02) :1169-1179

[9] FACTORS AFFECTING INFRA-RED SPECTRA OF SOME PLANAR ANIONS WITH D3H SYMMETRY .3. SPECTRA OF RARE-EARTH CARBONATES AND THEIR THERMAL DECOMPOSITION PRODUCTS [J].

GOLDSMITH, JA ;

ROSS, SD .

SPECTROCHIMICA ACTA PART A-MOLECULAR SPECTROSCOPY, 1967, A 23 (06) :1909-+

[10] A novel thick film conductive type CO2 sensor [J].

Haeusler, A ;

Meyer, JU .

SENSORS AND ACTUATORS B-CHEMICAL, 1996, 34 (1-3) :388-395

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