Preparation and gas-sensing properties of nano-CoTiO3

被引:70
作者
Chu, XF [1 ]
Liu, XQ [1 ]
Wang, GZ [1 ]
Meng, GY [1 ]
机构
[1] Univ Sci & Technol China, Dept Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China
基金
中国国家自然科学基金;
关键词
semiconductors; chemical synthesis; defects;
D O I
10.1016/S0025-5408(99)00167-1
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
This paper reports that nano-CoTiO3 powder can be used as a new type of gas-sensitive material for detecting ethanol gas. Cobalt titanate (CoTiO3) powders were prepared by a precipitation method. The preparation conditions were carefully controlled. The powders obtained were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The crystallite size of the powders calcined at 600, 700, and 800 degrees C for 2 h were 18, 22, and 40 nm, respectively. The conductance-temperature, sensitivity-operating temperature, sensitivity-calcining temperature, and sensitivity-gas concentration properties of the CoTiO3-based sensors were investigated. The sensors based on nano-CoTiO3 exhibited high sensitivity, good selectivity, and good response characteristics toward ethanol gas. (C) 2000 Elsevier Science Ltd.
引用
收藏
页码:1789 / 1795
页数:7
相关论文
共 9 条
[1]  
CHU XF, IN PRESS MAT RES B
[2]   EFFECTS OF PH AND H2O2 UPON COPRECIPITATED PBTIO3 POWDERS .1. PROPERTIES OF AS-PRECIPITATED POWDERS [J].
FOX, GR ;
ADAIR, JH ;
NEWNHAM, RE .
JOURNAL OF MATERIALS SCIENCE, 1990, 25 (08) :3634-3640
[3]  
Kazuyuki T., 1984, J AM CHEM SOC, V106, P5172
[4]   Preparation and characterization of nanocrystalline alpha-Fe2O3 by a sol-gel process [J].
Liu, XQ ;
Tao, SW ;
Shen, YS .
SENSORS AND ACTUATORS B-CHEMICAL, 1997, 40 (2-3) :161-165
[5]  
MURAKAMI K, 1983, P 1 INT M CHEM SENS, P18
[6]  
NITTA M, 1980, J ELECT MAT, V9, P89
[7]   THERMODYNAMICS OF DOUBLE OXIDES .2. STUDY OF THE COO-TIO2 SYSTEM BY THE EMF METHOD [J].
POPOV, SG ;
LEVITSKII, VA .
JOURNAL OF SOLID STATE CHEMISTRY, 1981, 38 (01) :1-9
[8]  
SHEN YS, 1993, SENSOR ACTUAT B-CHEM, V12, P5, DOI 10.1016/0925-4005(93)85003-S
[9]  
1959, Patent No. 67601