Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 171, Issue -, Pages 135-140Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2012.01.069
Keywords
PHSs Cu2O; In situ oxidative etching; Ethanol; Gas sensor
Funding
- National Natural Science Foundation of China [50832001, 50902057, 20773043, 21073071, 51025206, 51002014, 51002061]
- National Basic Research Program of China [2011CB808200]
- Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT) [IRT1132]
- Fundamental Research Funds for Jilin University [450060441014, 450060323432, 450060441010, 450060445440]
- Doctoral Foundation New Teacher Project [20110061120014]
- China Postdoctoral Science Foundation [20110491287, 20110491319]
- MOE [200801830025]
- Jilin University, China
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Well-defined polyhedral hollow structures (PHSs) Cu2O with hollow interior and high geometrical symmetry are successfully prepared via a novel in situ oxidative etching method at room temperature. X-ray power diffraction (XRD), field-emission scanning electron microscope (FESEM), and high-resolution transmission electron microscopy (HRTEM) techniques were employed to elaborately characterize the structure and morphology of the as-prepared samples. These PHSs Cu2O with hollow interiors and open window show effective-applied and good-diffusion structure for the gas-sensing application, which will exhibit short good response, response/recovery times and good reproducibility to ethanol. It is found that type-I nanocages Cu2O have a response of 8.6-50 ppm ethanol at the optimal operating temperature of 210 degrees C and the response time is within 23.7s. (C) 2012 Elsevier B.V. All rights reserved.
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