Gas sensing properties of nanocrystalline tungsten oxide synthesized by acid precipitation method

被引：30
作者：
Senguttuvan, T. D. [1 ]
Srivastava, Vibha [1 ]
Tawal, Jai S. [2 ]
Mishra, Monika [1 ]
Srivastava, Shubhda [1 ]
Jain, Kiran [1 ]
机构：
[1] Natl Phys Lab, Elect Mat Div, New Delhi 110012, India
[2] Natl Phys Lab, Mat Characterizat Div, New Delhi 110012, India
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2010年 / 150卷 / 01期
关键词：
WO3; Metal oxide; Gas sensor; Ammonia sensor; Thick film; Chemical synthesis; WO3; THIN-FILMS; MICROSTRUCTURE; SENSOR; SIZE; NOX;
D O I：
10.1016/j.snb.2010.06.053
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
WO3 2H(2)O samples were prepared by acidic precipitation of sodium tungstate solution Nanocrystalline WO3 powders were obtained after 350 and 600 degrees C calcinations. XRD patterns of these samples showed a diffraction profile similar to that of monoclinic WO3 Calcinations at 600 degrees C yield WO3 powders with particle sizes ranging (loin 60 to 170 nm whereas that for 350 degrees C calculations ale in the range of 30-150 nm The gas sensing properties of these powders in the form of thick film were investigated with and without platinum doping Gas response of thick films sintered at two different temperatures was measured at four different operating temperatures We confirm that the sensor elements made from 600 degrees C calcined powders doped with platinum sintered at 800 degrees C ate highly responsive and selective to ammonia vapour at 350 degrees C operating temperature as compared to sensor elements made from commercial powders (C) 2010 Elsevier B.V. All rights reserved
引用
收藏
页码：384 / 388
页数：5
相关论文
共 20 条
  • [1] DEFECT STATES IN WO3 STUDIED WITH PHOTOELECTRON-SPECTROSCOPY
    BRINGANS, RD
    HOCHST, H
    SHANKS, HR
    [J]. PHYSICAL REVIEW B, 1981, 24 (06): : 3481 - 3489
  • [2] Characterization of sol-gel prepared WO3 thin films as a gas sensor
    Cantalini, C
    Atashbar, MZ
    Li, Y
    Ghantasala, MK
    Santucci, S
    Wlodarski, W
    Passacantando, M
    [J]. JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS, 1999, 17 (04): : 1873 - 1879
  • [3] CANTALINI C, 1999, 10 INT C SOL STAT SE, P182
  • [4] Wet process-prepared thick films of WO3 for NO2 sensing
    Choi, YG
    Sakai, G
    Shimanoe, K
    Miura, N
    Yamazoe, N
    [J]. SENSORS AND ACTUATORS B-CHEMICAL, 2003, 95 (1-3) : 258 - 265
  • [5] Preparation of size and habit-controlled nano crystallites of tungsten oxide
    Choi, YG
    Sakai, G
    Shimanoe, K
    Teraoka, Y
    Miura, N
    Yamazoe, N
    [J]. SENSORS AND ACTUATORS B-CHEMICAL, 2003, 93 (1-3) : 486 - 494
  • [6] Preparation of aqueous sols of tungsten oxide dihydrate from sodium tungstate by an ion-exchange method
    Choi, YG
    Sakai, G
    Shimanoe, K
    Miura, N
    Yamazoe, N
    [J]. SENSORS AND ACTUATORS B-CHEMICAL, 2002, 87 (01) : 63 - 72
  • [7] DIETER K, 2001, J PHYS D, pR125
  • [8] Ultimate limits in the miniaturization of chemical sensors
    Gopel, W
    [J]. SENSORS AND ACTUATORS A-PHYSICAL, 1996, 56 (1-2) : 83 - 102
  • [9] Aqueous and alcoholic syntheses of tungsten trioxide powders for NO2 detection
    Guidi, V
    Blo, M
    Butturi, MA
    Carotta, MC
    Galliera, S
    Giberti, A
    Malagù, C
    Martinelli, G
    Piga, M
    Sacerdoti, M
    Vendemiati, B
    [J]. SENSORS AND ACTUATORS B-CHEMICAL, 2004, 100 (1-2): : 277 - 282
  • [10] On the effects of the materials and the noble metal additives to NO2 detection
    Ivanov, P.
    Llobet, E.
    Blanco, F.
    Vergara, A.
    Vilanova, X.
    Gracia, I.
    Cane, C.
    Correig, X.
    [J]. SENSORS AND ACTUATORS B-CHEMICAL, 2006, 118 (1-2) : 311 - 317
12