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Boosting Photocatalytic Performance of Inactive Rutile TiO2 Nanorods under Solar Light Irradiation: Synergistic Effect of Acid Treatment and Metal Oxide Co-catalysts
journal contribution
posted on 2017-06-30, 00:00 authored by Love Kumar Dhandole, Mahadeo A. Mahadik, Su-Gyeong Kim, Hee-Suk Chung, Young-Seok Seo, Min Cho, Jung Ho Ryu, Jum Suk JangIn
the present work, we accomplish the boosting of photocatalytic performance
by the synergistic effect of acid treatment and transition metal oxide
co-catalysts on molten salt rutile TiO2 nanorods. FT-IR
and XPS (oxygen deconvolution) results confirmed that the amount of
hydroxyl groups increased on the surface of rutile TiO2 nanorods (TO-NRs) after acid treatment. HR-TEM analysis revealed
fine dispersion of metal oxide on the surface of acid treated TiO2 nanorods (ATO-NRs). The photocatalytic activities of as-prepared
(TO-NRs), acid treated (ATO-NRs), metal oxide loaded (MTO-NRs), and
both acid treated and metal oxide loaded (MATO-NRs) nanorods were
compared based on the rate kinetics and dye degradation efficiencies.
Cobalt oxide (1 wt %) loaded and 1.0 M acid treated TiO2 nanorods (Co/ATO-NR) exhibited the higher photocatalytic degradation
efficiency for Orange-II dye degradation and inactivation of S. typhimurium pathogen compared to other photocatalysts
under solar irradiation. Photoelectrochemical analysis demonstrated
that the charge transfer process in Co/ATO-NR is significantly higher
than that in the untreated samples. The improved photocatalytic activity
of inactive TO-NRs might be due to enhanced charge transfer of finely
dispersed metal oxides on the OH-rich surface of acid treated TiO2 nanorods.
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TO-NR1.0 M acidXPStransition metal oxide co-catalystsHR-TEMFT-IRsalt rutile TiO 2 nanorodsTiO 2 nanorodsphotocatalytic degradation efficiencyATO-NRmetal oxideBoosting Photocatalytic PerformanceInactive Rutile TiO 2 Nanorodsdye degradation efficienciesrutile TiO 2 nanorodsMATO-NRSolar Light Irradiationsurfacecharge transfer processMTO-NRMetal Oxide Co-catalystsacid treatmentOrange-II dye degradation
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