Enhanced catalyst dispersion and structural control of Co3O4-silica nanocomposites by rapid thermal processing
Author
Liu, L; Ding, J; Sarrigani, GV; Fitzgerald, P; Aljunid Merican, ZM; Lim, JW; Tseng, HH; Xie, F; Zhang, B; Wang, DKDate
2020-03-01Source Title
Applied Catalysis B: EnvironmentalPublisher
ElsevierUniversity of Melbourne Author/s
Liu, LiangAffiliation
Chemical and Biomolecular EngineeringMetadata
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Journal ArticleCitations
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
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http://wrap.warwick.ac.uk/128232/1/WRAP-enhanced-catalyst-dispersion-structural-nanocomposites-Xie-2019.pdfAbstract
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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