Synthesis of nitrogen-doped ZnO nanocrystallites with one-dimensional structure and their catalytic activity for ammonium perchlorate decomposition

In this study, nitrogen-doped ZnO (N-doped ZnO) nanocrystallites with a one-dimensional structure were synthesized successfully via an advanced wet chemical technique, and their microstructures were characterized by SEM, HRTEM, XRD, and XPS. The catalytic performance of the as-synthesized samples wa...

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Bibliographic Details
Published in:Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology 2010-08, Vol.12 (6), p.2211-2219
Main Authors: Zheng, Min, Wang, Zuo-shan, Wu, Jia-qing, Wang, Qing
Format: Article
Language:English
Subjects:
Ammonium
Catalytic activity
Characterization and Evaluation of Materials
Chemistry and Materials Science
Decomposition
Inorganic Chemistry
Lasers
Materials Science
Morphology
Nanocrystals
Nanoparticles
Nanorods
Nanostructure
Nanotechnology
Nitrogen
Optical Devices
Optics
Perchlorate
Photonics
Physical Chemistry
Raw materials
Research Paper
Thermal decomposition
Urea
Zinc oxide
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Summary:In this study, nitrogen-doped ZnO (N-doped ZnO) nanocrystallites with a one-dimensional structure were synthesized successfully via an advanced wet chemical technique, and their microstructures were characterized by SEM, HRTEM, XRD, and XPS. The catalytic performance of the as-synthesized samples was evaluated by investigating their effect on the thermal decomposition of ammonium perchlorate (AP) by DSC and TG. Results indicate that the morphologies of N-doped ZnO nanocrystallites mainly depend on the presence of urea in the raw materials. Nanocrystallites with peculiar morphology, in which numerous nanorods with a diameter of 40–50 nm arrange orderly and symmetrically in hollow nanotubes with a diameter of 200–800 nm and thickness of 20–30 nm, can be produced when urea is used as a raw material. The as-synthesized N-doped ZnO sample with peculiar morphology drives the thermal decomposition peak of AP decrease about 163 °C with a strong decomposition heat about 1,325 J/g, and the activation energy also decreases from 178.22 to 93.51 kJ/mol. The enhanced catalytic activity of N-doped ZnO sample can be attributed to oxygen vacancies and other defects induced by the doping of nitrogen.
ISSN:1388-0764
1572-896X
DOI:10.1007/s11051-009-9787-7