Abstract
Inverse opal ceria (CeO2) films and powders, exhibiting three-dimensional ordered macroporous (3DOM) structures and a photonic band gap (PBG) in the visible region, were successfully fabricated using the colloidal crystal template approach. Colloidal crystals templates, comprising polymethylmethacrylate (PMMA) spheres of diameter ∼325 nm arranged on a face-centered cubic (fcc) lattice, were prepared by self-assembly from aqueous colloidal suspensions of PMMA spheres. After drying, the interstitial spaces in the PMMA colloidal crystals were filled with a ceria sol–gel precursor, and then the resulting structure calcined at 400 °C to remove the polymer template. The ceria inverse opals obtained were characterized by SEM, XRD, BET, porosity, and UV–vis transmittance measurements and showed fcc ordering of macropores (diameter around 240 nm) within a CeO2 nanocrystal matrix. The CeO2 volume fraction in the inverse opals was 17–18 vol %, and its surface area was 51 m2 g−1. Both the PMMA colloidal crystals and ...
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.
