期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 495, 期 -, 页码 207-215出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2017.01.106
关键词
NiO/ZnO composites; Hollow spheres; p-n heterostructure; Fast response/recovery; Acetone
资金
- National Nature Science Foundation of China [61520106003, 61503148, 61327804, 61374218, 61134010]
- Program for Chang Jiang Scholars and Innovative Research Team in University [IRT13018]
- National High-Tech Research and Development Program of China (863 Program) [2013AA030902, 2014AA06A505]
- China Postdoctoral Science Foundation [2015M580247]
NiO/ZnO composites were synthesized by decorating numerous Nio nanoparticles on the surfaces of well dispersed ZnO hollow spheres using a facile solvothermal method. Various kinds of characterization methods were utilized to investigate the structures and morphologies of the hybrid materials. The results revealed that the NiO nanoparticles with a size of similar to 10 nm were successfully distributed on the surfaces of ZnO hollow spheres in a discrete manner. As expected, the NiO/ZnO composites demonstrated dramatic improvements in sensing performances compared with pure ZnO hollow spheres. For example, the response of NiO/ZnO composites to 100 ppm acetone was similar to 29.8, which was nearly 4.6 times higher than that of primary ZnO at 275 degrees C, and the response/recovery time were 1/20 s, respectively. Meanwhile, the detection limit could extend down to ppb level. The likely reason for the improved gas sensing properties was also proposed. (C) 2017 Elsevier Inc. All rights reserved.
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