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    Enhanced catalyst dispersion and structural control of Co3O4-silica nanocomposites by rapid thermal processing

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    Author
    Liu, L; Ding, J; Sarrigani, GV; Fitzgerald, P; Aljunid Merican, ZM; Lim, JW; Tseng, HH; Xie, F; Zhang, B; Wang, DK
    Date
    2020-03-01
    Source Title
    Applied Catalysis B: Environmental
    Publisher
    Elsevier
    University of Melbourne Author/s
    Liu, Liang
    Affiliation
    Chemical and Biomolecular Engineering
    Metadata
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    Document Type
    Journal Article
    Citations
    Liu, L., Ding, J., Sarrigani, G. V., Fitzgerald, P., Aljunid Merican, Z. M., Lim, J. W., Tseng, H. H., Xie, F., Zhang, B. & Wang, D. K. (2020). Enhanced catalyst dispersion and structural control of Co3O4-silica nanocomposites by rapid thermal processing. Applied Catalysis B: Environmental, 262, pp.118246-118246. https://doi.org/10.1016/j.apcatb.2019.118246.
    Access Status
    Access this item via the Open Access location
    URI
    http://hdl.handle.net/11343/253907
    DOI
    10.1016/j.apcatb.2019.118246
    Open Access URL
    http://wrap.warwick.ac.uk/128232/1/WRAP-enhanced-catalyst-dispersion-structural-nanocomposites-Xie-2019.pdf
    Abstract
    We synthesized cobalt tetroxide (Co3O4) silica nanocomposites based on the conventional tetraethyl orthosilicate (TEOS) monomer and ethoxy polysiloxane (ES40) oligomer by sol-gel chemistry coupled with rapid thermal process (RTP). The physicochemical properties and structural formation of cobalt oxide silica nanocomposites were comprehensive characterized. By using ES40, well-controlled, homogeneous nanoparticle dispersion and size of Co3O4 with 5 nm within the silica matrix were achieved leading to fractal-like morphology. The concentration of the Co3O4 nanocatalyst was also significantly enhanced by more than 50 folds. Fenton-like HCO3−/H2O2 catalytic system using acid orange 7 and nanocomposites was examined for organic degradation. 98% AO7 and naphthalene intermediates degradation efficiency was achieved after 20 min with ES40-derived catalyst, which was three to ten folds faster than that of the TEOS-derived catalyst and the commercial Co3O4 catalyst. The combined use of ES40 sol-gel and RTP enabled a simple way to nanomaterial preparation and lowers overall processing time.

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