Low Temperature Synthesis of Needle-like α-FeOOH and Their Conversion into α-Fe2O3 Nanorods for Humidity Sensing Application

被引：44
作者：
Adhyapak, Parag V. [1 ]
Mulik, Uttam P. [1 ]
Amalnerkar, Dinesh P. [1 ]
Mulla, Imtiaz S. [1 ]
机构：
[1] Ctr Mat Elect Technol, Pune 411008, Maharashtra, India
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2013年 / 96卷 / 03期
关键词：
LITHIUM-ION BATTERY; GAS SENSORS; IRON-OXIDE; WATER-TREATMENT; BETA-FEOOH; HEMATITE; CERAMICS; NANOSTRUCTURES; SPECTROSCOPY; NANOTUBES;
D O I：
10.1111/jace.12189
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this study, we report template and surfactant-free, low temperature (70 degrees C) synthesis of needle-like alpha-FeOOH and its conversion at 400 degrees C into alpha-Fe2O3 nanorods using Fe(+2) and Fe(+3) chlorides and urea as a hydrolysis-controlling agent. The isolated needle-like -FeOOH indicates asparagus-type growth pattern having length ca. 600nm with 80nm diameter at base and apex diameter of around 10nm. The sample on heating (alpha-Fe2O3) shows nanorod-like morphology. The samples were characterized using various physicochemical characterization techniques such as XRD, Raman spectroscopy, UV-Vis spectroscopy, particle size distribution analysis, Field Emission Scanning Electron Microscopy (FE-SEM), and humidity sensing performance. The humidity sensing behavior of both alpha-FeOOH and alpha-Fe2O3 was studied. The alpha-FeOOH shows quicker (10s) and higher response toward change in humidity from 20%RH to 90%RH as compared with alpha-Fe2O3 (60s). Their typical morphology and crystalline structure plays an important role in humidity sensing behavior.
引用
收藏
页码：731 / 735
页数：5
相关论文
共 34 条
  • [1] Bersani D, 1999, J RAMAN SPECTROSC, V30, P355, DOI 10.1002/(SICI)1097-4555(199905)30:5<355::AID-JRS398>3.0.CO
  • [2] 2-C
  • [3] Humidity-sensing properties of nanocrystalline haematite thin films prepared by sol-gel processing
    Chauhan, P
    Annapoorni, S
    Trikha, SK
    [J]. THIN SOLID FILMS, 1999, 346 (1-2) : 266 - 268
  • [4] Grain boundary kinetics in oxide ceramics with the cubic fluorite crystal structure and its derivatives
    Chen, IW
    [J]. INTERFACE SCIENCE, 2000, 8 (2-3) : 147 - 156
  • [5] α-Fe2O3 nanotubes in gas sensor and lithium-ion battery applications
    Chen, J
    Xu, LN
    Li, WY
    Gou, XL
    [J]. ADVANCED MATERIALS, 2005, 17 (05) : 582 - +
  • [6] CHARACTERISTICS OF ALPHA-FE2O3 THICK-FILM GAS SENSORS
    CHUNG, WY
    LEE, DD
    [J]. THIN SOLID FILMS, 1991, 200 (02) : 329 - 339
  • [7] CORNELL RM, 1996, IRON OXIDES STRUCTUR, P464
  • [8] Heated goethite and natural hematite: Can Raman spectroscopy be used to differentiate them?
    de Faria, D. L. A.
    Lopes, F. N.
    [J]. VIBRATIONAL SPECTROSCOPY, 2007, 45 (02) : 117 - 121
  • [9] De Grotthuss C, 1806, Ann. Chim, V58, P54
  • [10] deFaria DLA, 1997, J RAMAN SPECTROSC, V28, P873, DOI 10.1002/(SICI)1097-4555(199711)28:11<873::AID-JRS177>3.0.CO
1234