Efficient catalytic ozonation of bisphenol A by three-dimensional mesoporous CeOx-loaded SBA-16

Mu, Jiaxin; Li, Shangyi; Wang, Jing; Li, Xukai; Chen, Weirui; Tong, Xinyuan; Li, Laisheng

doi:10.1016/j.chemosphere.2021.130412

Cited by 26 publications

(6 citation statements)

References 61 publications

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“…The activity of Mo-Ni/SBA-16 (1 wt%) catalyst remained stable after being calcined at 700 °C for 100 h in reactive gas atmosphere. Similar research [ 18 ], modified SBA-16 molecular sieve with three-dimensional mesoporous CeO X , catalyzed the oxidation of bisphenol A by the prepared catalyst, which effectively removed the ozonation of bisphenol A and increased the conversion rate of bisphenol A. On the one hand, the CeO X /SBA-16 mesoporous structured materials presented large surface area and uniform pore distribution, which was conducive to the adsorption of transformation byproducts (TBPs) and then, the mass transfer.…”

Section: Introductionsupporting

confidence: 55%

Study on MoO3/SBA-16 catalyzed transesterification to synthesize diphenyl carbonate

HE¹

2022

Turkish Journal of Chemistry

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In this paper, the mesoporous molecular sieve SBA-16 with good dispersion was prepared by hydrothermal method. Under the condition of Si/Mo= 1.0, MoO 3 /SBA-16 catalysts were prepared by iso-dipping method at 550 °C, 650 °C and 750 °C calcination temperature, which for the synthesis of diphenyl carbonate (DPC) from dimethyl carbonate (DMC) and phenyl acetate (PA) was used, and the uncalcined MoO 3 /SBA-16 was used as a reference. XRD, TG-DTA, XPS, ICP-MS, FT-IR, BET, SEM and TEM characterization. The effects of calcination temperature and reaction conditions on the catalytic performance of MoO 3 /SBA-16 in transesterification of DMC and PA were investigated. The results show that the MoO 3 /SBA-16 catalyst prepared at 550 °C has the best catalytic performance in the reaction of DMC and PA ester exchange, and the catalyst has the best catalytic performance in the appropriate reaction strip (n(PA) = 1.0 mol; n (PA)/n (DMC) = 2.0; m (MoO 3 /SBA-16) = 6.0g; t = 5.0 h; T = 180 °C), the DMC conversion is 78.5%, and the selectivity of methyl phenyl carbonate (MPC) and DPC is 51.1% and 46.5%, respectively. After five cycles, the catalyst activity decreased and the conversion of DMC decreased from 78.5% to 15.8%. However, its crystal structure remained unchanged. The used catalyst can be easily regenerated by calcination in air at 550 °C for 5 h. The catalytic performance of the regenerated catalyst was almost as high as that of the fresh one.

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Section: Introductionsupporting

confidence: 55%

Study on MoO3/SBA-16 catalyzed transesterification to synthesize diphenyl carbonate

HE¹

2022

Turkish Journal of Chemistry

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“…Since this technology is easy to apply in practical water treatment projects, it has become a hot research topic in the field [ 6 ]. Metal oxides [ 7 , 8 ], metal silicates [ 9 ], metal or metal oxide supported on the carrier [ 10 , 11 , 12 ], and natural minerals with mesoporous [ 13 , 14 ] characteristics have been studied extensively in the past few years as heterogeneous ozonation catalysts because they can generate reactive oxygen species (ROS) and degrade refractory organic pollutants by catalyzing ozone decomposition. Among these catalysts, metal silicates have received great attention as heterogeneous catalytic ozonation catalysts because they have ordered mesoporous channels, large specific surface area, good chemical stability, a low cost, and abundant hydroxyl groups on the surface [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

Heterogeneous Catalysis of Ozone Using Iron–Manganese Silicate for Degradation of Acrylic Acid

et al. 2022

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Iron–manganese silicate (IMS) was synthesized by chemical coprecipitation and used as a catalyst for ozonating acrylic acid (AA) in semicontinuous flow mode. The Fe-O-Mn bond, Fe-Si, and Mn-Si binary oxide were formed in IMS on the basis of the results of XRD, FTIR, and XPS analysis. The removal efficiency of AA was highest in the IMS catalytic ozonation processes (98.9% in 15 min) compared with ozonation alone (62.7%), iron silicate (IS) catalytic ozonation (95.6%), and manganese silicate catalytic ozonation (94.8%). Meanwhile, the removal efficiencies of total organic carbon (TOC) were also improved in the IMS catalytic ozonation processes. The IMS showed high stability and ozone utilization. Additionally, H2O2 was formed in the process of IMS catalytic ozonation. Electron paramagnetic resonance (EPR) analysis and radical scavenger experiments confirmed that hydroxyl radicals (•OH) were the dominant oxidants. Cl−, HCO3−, PO43−, Ca2+, and Mg2+ in aqueous solution could adversely affect AA degradation. In the IMS catalytic ozonation of AA, the surface hydroxyl groups and Lewis acid sites played an important role.

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“…When pH was above 7.0, the removal of MD did not change obviously. The protonation or deprotonation of hydroxyl groups is determined by pH pzc of catalyst and aqueous pH (Jung & Choi, 2006; Mu et al, 2021). The pH pzc was 7.06 by pH drift method (Figure S2).…”

Section: Resultsmentioning

confidence: 99%

Mechanism of catalytic ozonation for elimination of methyldopa with Fe₃O₄@SiO₂@CeO₂ catalyst

Xiong

Fan

Song

et al. 2021

Water Environment Research

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In this study, a magnetic nanocatalyst (Fe3O4@SiO2@CeO2) was prepared and applied in the catalytic ozonation of methyldopa (MD). The effects of operational parameters on catalytic ozonation performance were investigated, including ozone dosage, catalyst dosage, initial MD concentration, and pH. The removal of MD was 45.2% in ozonation, whereas the efficiency was achieved to 83.0% with the addition of Fe3O4@SiO2@CeO2. The results showed that Fe3O4@SiO2@CeO2 could significantly improve the catalytic ozonation performance. And the enhanced mechanism study showed that it was attributed to promotion of ozone decomposition to generate hydroxyl radical. The reaction model was explored, and the reaction rates were calculated for the MD degradation in catalytic ozonation. A higher degradation efficiency of MD in catalytic ozonation was attributed to the enhanced surface effect of the catalysts, which was confirmed by using TBA, PO43−, and p‐BQ as scavengers of hydroxyl radical, surface reaction, and superoxide radical. The hydroxyl radical and superoxide radical played an important role in the degradation of MD. The mechanism of catalytic ozonation by Fe3O4@SiO2@CeO2 was discussed via X‐ray photoelectron spectroscopy (XPS) spectra and experimental data.

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Efficient catalytic ozonation of bisphenol A by three-dimensional mesoporous CeOx-loaded SBA-16

Cited by 26 publications

References 61 publications

Study on MoO3/SBA-16 catalyzed transesterification to synthesize diphenyl carbonate

Study on MoO3/SBA-16 catalyzed transesterification to synthesize diphenyl carbonate

Heterogeneous Catalysis of Ozone Using Iron–Manganese Silicate for Degradation of Acrylic Acid

Mechanism of catalytic ozonation for elimination of methyldopa with Fe₃O₄@SiO₂@CeO₂ catalyst

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Efficient catalytic ozonation of bisphenol A by three-dimensional mesoporous CeOx-loaded SBA-16

Cited by 26 publications

References 61 publications

Study on MoO3/SBA-16 catalyzed transesterification to synthesize diphenyl carbonate

Study on MoO3/SBA-16 catalyzed transesterification to synthesize diphenyl carbonate

Heterogeneous Catalysis of Ozone Using Iron–Manganese Silicate for Degradation of Acrylic Acid

Mechanism of catalytic ozonation for elimination of methyldopa with Fe3O4@SiO2@CeO2 catalyst

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Mechanism of catalytic ozonation for elimination of methyldopa with Fe₃O₄@SiO₂@CeO₂ catalyst