Journal
MATERIALS LETTERS
Volume 164, Issue -, Pages 48-51Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2015.10.117
Keywords
Cactus-like NiO; Sensors; Microstructure; Semiconductors; Hydrothermal
Funding
- National Natural Science Foundations of China [10874140]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
- Natural Science Foundation of Gansu Province [1308RJZA258, 1308RJZA216]
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Cactus-like NiO was successfully synthesized by adjusting reaction time of a simple hydrothermal approach. The different morphologies of the NiO samples obtained by different reaction time were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM). And the gas-sensing performance of these products was studied, too. The results indicated that the sensor based on the cactus-like NiO nanostructures obtained by choosing appropriate reaction time showed much better sensing properties than other samples. The response of the sensor based on cactus-like NiO was about 13.51-100 ppm acetone at a working temperature of 260 degrees C, and the response and recovery time was 24 and 39 s, respectively. The improvement gas sensing properties based on cactus-like NiO sensor may be due to the unique structures, the good crystallization and large surface area. (C) 2015 Elsevier B.V. All rights reserved.
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