1. Synthesis of polyhedron hollow structure Cu2O and their gas-sensing properties
- Author
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Sui, Yongming, Zeng, Yi, Zheng, Weitao, Liu, Bingbing, Zou, Bo, and Yang, Haibin
- Subjects
- *
GAS detectors , *COPPER oxide , *POLYHEDRA , *CHEMICAL structure , *TEMPERATURE effect , *X-ray diffraction , *DIFFUSION - Abstract
Abstract: 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 8.6–50ppm ethanol at the optimal operating temperature of 210°C and the response time is within 23.7s. [Copyright &y& Elsevier]
- Published
- 2012
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