Abstract
Spherical porous Al2O3 nanoparticles were synthesized by hydrothermal method using C6H5(NH4)3O7·2H2O and Al(NO3)3·9H2O as raw materials. The morphology and size of the Al2O3 particles were significantly influenced by hydrothermal temperature, time, and the molar ratio of Al3+ to (C6H5O7)3−. The interphase Al(OH)3 is a key factor on the preparation of γ-Al2O3. Under the hydrothermal conditions of high temperatures, Al(OH)3 decomposes into the precursor γ-AlOOH instead of the exothermic reaction between Al(OH)3 and H+. In the form of hydrogen bonds, (C6H5O7)3− adsorbs on the surface of γ-AlOOH nanoparticles to form some nano-chains, which interweave and tangle each other to become spheres. During calcination, the precursor γ-AlOOH converts to γ-Al2O3 nanoparticles while the spherical morphology is retained. Gas outrush during calcination should be the formative cause of the porous structure. The as-prepared spherical porous Al2O3 nanoparticles can be used as a catalyst or carrier due to the favorable adsorption property.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
