TY  - JOUR
AU  - Liu, L
AU  - Ding, J
AU  - Sarrigani, GV
AU  - Fitzgerald, P
AU  - Aljunid Merican, ZM
AU  - Lim, JW
AU  - Tseng, HH
AU  - Xie, F
AU  - Zhang, B
AU  - Wang, DK
Y2  - 2020/12/14
Y1  - 2020/03/01
SN  - 0926-3373
UR  - http://hdl.handle.net/11343/253907
AB  - 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.
LA  - English
PB  - Elsevier
T1  - Enhanced catalyst dispersion and structural control of Co3O4-silica nanocomposites by rapid thermal processing
DO  - 10.1016/j.apcatb.2019.118246
IS  - Applied Catalysis B: Environmental
VL  - 262
SP  - 118246-118246
ER  -