Liquid-phase oxidation of phenol in facile condition using Pt/CeO2–ZrO2–SnO2 catalyst supported on mesoporous silica SBA-16

Effective p-cresol removal through catalytic liquid-phase oxidation under moderate conditions using Pt/CeO2-ZrO2-SnO2/SBA-16 as a catalyst

“…Zr 4+ ions are generally introduced into CeO 2 to increase its oxygen release and storage capacities due to an increase in oxide ion diffusivity [32], which leads to a lowering of the reduction temperature. For CZSn/SBA, the peak are split into two, and the reductions at 305°C and 375°C correspond to the surface and bulk reductions of Ce 4+ ions, respectively [25]. Among the samples, CZSn/SBA exhibited the lowest onset temperature, i.e.…”

“…SBA-16 was synthesized using the hydrothermal method [25]. Pluronic F-127 (1.6 g) was dissolved in 0.2 mol•L −1 (90 mL) hydrochloride acid, and 1,3,5-trimethylbenzene (1.1 mL) was then added.…”

“…In wastewater treatment, CeO 2 -ZrO 2 has also been used for catalytic oxidation of phenolic compounds [24]. In our previous studies, we demonstrated that the introduction of tin oxide (SnO 2 ) into the CeO 2 -ZrO 2 lattice led to a further increase of its oxygen release and storage capabilities because a synergy between the valence changes of Sn 4+/2+ with those of Ce 4+/3+ could trigger its reducibility [25][26][27]. In this study, we focused on the CeO 2 -ZrO 2 -SnO 2 solid solution as the promoter, in which the active oxygen species is effectively supplied from inside the lattice to an activator, and, thus, both the operating temperature and pressure can be expected to be lowered.…”

Catalytic Liquid-Phase Oxidation of Phenolic Compounds Using Ceria-Zirconia Based Catalysts

“…In a recent study, the effective phenol removal was demonstrated even at the moderate conditions by using the catalyst, which consists of Pt and Ce 0.68 Zr 0.17 Sn 0.15 O 2 dispersed on mesoporous silica SBA-16 (Santa Barbara Amorphous No. 16) with large surface area (Supandi et al, 2017). They reported that the phenol conversion of Pt/Ce 0.68 Zr 0.17 Sn 0.15 O 2 /SBA-16 reached up to 91% after the reaction at moderate temperature of 80°C and the atmospheric pressure for 6 h. Here, only ca.…”

Selective oxidation of glycerol to dihydroxyacetone using CeO2-ZrO2-Bi2O3-SnO2-supported platinum catalysts

“…The aim of this study was to clarify the effects of Bi 3+ introduction and oxygen release and storage abilities on DHA yields obtained using CeO 2 -ZrO 2 -based catalysts. To this end, Sn 4+/2+ was selected as a dopant to improve the oxygen release and storage abilities owing to the facile Sn 4+/2+ redox cycle [16][17][18]; therefore, Bi 3+ and Sn 4+/2+ -doped CeO 2 -ZrO 2 promoters were synthesized, and the catalytic activities of Pt/CeO 2 -ZrO 2 -Bi 2 O 3 -SnO 2 /SBA-16 for selective glycerol oxidation were investigated.…”