Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 262, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2019.118246
Keywords
Sol-gel; Rapid thermal processing; Cobalt tetroxide silica; Fenton reaction; Heterogeneous catalysis
Funding
- Australian Research Council [DE150101687, DP190101734]
- Sydney Southeast Asia Centre
- Yayasan UTP for the Fundamental Research Grant (FRGS-YUTP)
- Sydney Analytical Core Research Facilities
- NSF [DMR-0520547]
- EU Horizon 2020 programme under the SINE2020 project [654000]
- Australian Research Council [DE150101687] Funding Source: Australian Research Council
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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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