Enhanced catalyst dispersion and structural control of Co3O4-silica nanocomposites by rapid thermal processing
AuthorLiu, L; Ding, J; Sarrigani, GV; Fitzgerald, P; Aljunid Merican, ZM; Lim, JW; Tseng, HH; Xie, F; Zhang, B; Wang, DK
Source TitleApplied Catalysis B: Environmental
University of Melbourne Author/sLiu, Liang
AffiliationChemical and Biomolecular Engineering
Document TypeJournal Article
CitationsLiu, 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, https://doi.org/10.1016/j.apcatb.2019.118246.
Access StatusAccess this item via the Open Access location
Open Access URLPublished version
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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