期刊
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
卷 64, 期 2, 页码 188-194出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jccs.201600787
关键词
ZnO nanoparticles; Hydrothermal method; Oxygen vacancy; Photocatalytic activity
资金
- National Natural Science Foundation of China [21404001]
- Doctoral Research Project Fund of Anhui University [33190213]
- Key Natural Science Research Project of Anhui Provincial Universities [KJ2013A013]
- Graduate Academic Innovation Research Project Fund of Anhui University [yqh100078]
- Scientific Research Training Program for undergraduates in Anhui University [KYXL2015011]
Rod-like ZnO nanoparticles (NPs) were synthesized from zinc powder by a simple hydrothermal oxidation method. The presence of acetylacetone could promote the oxidation reaction of Zn and the formation of hexagonal nanorods. Then, the as-prepared samples were annealed in N-2, O-2, and air atmosphere at 550 degrees C for 2h to control the number of oxygen vacancies in the samples. The samples were characterized by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, and UV-vis spectroscopy. The correlation between the oxygen vacancies and the photocatalytic activity was investigated. The results reveal that the annealing process alters the samples' bandgap and number of the oxygen vacancies, thereby improving the photocatalytic activity. The enhancement of photodegradation efficiency arising from the appropriate content of oxygen vacancies is discussed.
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