International Journal of Nano Dimension (Int. J. Nano Dimens.) Synthesis and characterization of nanocrystalline CoAPO-5: Structural and morphological analysis by alteration on hydrothermal parameters Volume 4 (2013) Issue 1, August 2013 2024 02 29 Synthesis and characterization of nanocrystalline CoAPO-5: Structural and morphological analysis by alteration on hydrothermal parameters 10.7508/ijnd.2013.01.008 EN A. Hassanvand Separation Processes Research Group (SPRG), Department of Engineering, University of Kashan, Kashan, Iran. M. Asghari Energy Research Institute, University of Kashan, Ghotb-e-Ravandi Ave., Kashan, Iran. H. Halakoei Energy Research Institute, University of Kashan, Kashan, Iran. B. Rajaei Separation Processes Research Group (SPRG), Department of Engineering, University of Kashan, Kashan, Iran. Energy Research Institute, University of Kashan, Ghotb-e-Ravandi Ave., Kashan, Iran. Journal Article 2024 02 29 Nano-zeolite CoAPO-5 as a member of AFI family, was synthesized via a hydrothermal treatment, and structurally characterized using X-ray diffraction (XRD), scanning electron microscope (SEM), and energy dispersive X-ray analysis (EDAX). The effects of crystallization temperature and time on the structure of these powder products were studied. XRD patterns of the synthesized powders revealed a high-crystallinity and pure phase of AFI. SEM images and Scherrer equation showed the nano-size of the obtained CoAPO-5. Also, SEM images showed nano-wires as small as 30-50 nm in CoAPO-5 structures. According to EDAX analysis, P/Al ratio of the prepared CoAPO-5 powder was about 1.5. Crystal sizes and the crystallinity of CoAPO-5 reduced at higher temperatures of hydrothermal treatment. On the other hand, the larger crystals grew by increasing the crystallization time from 24 to 48 h.