Insights into mechanism of catalytic ozonation of cinnamyl alcohol over core–shell Fe3O4@SiO2@La2O3 catalyst

Song, Jinshan; Ma, Nengwei; Chen, Wenqing; Chen, Jianmeng; Dai, Qizhou

doi:10.1016/j.seppur.2021.119969

Cited by 29 publications

(9 citation statements)

References 42 publications

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“…67,68 The lattice oxygen species reflect the redox behavior of the metal, while the adsorption oxygen species represent the concentration of oxygen vacancies in the compound, for example, the number of O ads increases with the concentration of oxygen vacancies in perovskites. Generally, the more abundant O ads is the more active site on the surface of the catalyst, 69 indicating that the catalyst has a better catalytic activity. Therefore, the concentration of surface oxygen vacancies can be estimated from the ratio (O ads /O latt ) of oxygen species related to the surface oxygen vacancies to the lattice oxygen species.…”

Section: Identification Of Oxygen Vacancies and Active Sites By Xpsmentioning

confidence: 99%

Catalytic aerobic oxidation of lignin-based vanillyl alcohol under base–free conditions over an efficient and reusable LaFeO₃ perovskite for vanillin production

et al. 2023

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Section: Identification Of Oxygen Vacancies and Active Sites By Xpsmentioning

confidence: 99%

Catalytic aerobic oxidation of lignin-based vanillyl alcohol under base–free conditions over an efficient and reusable LaFeO₃ perovskite for vanillin production

et al. 2023

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“…230320) were loaded onto CPCM-8, according to a comparison of the standard patterns. According to earlier reports, the simultaneous loading of Fe 3 O 4 and La 2 O 2 CO 3 greatly reduced the intensity of the distinctive peaks of the two phases. Due to the cross-linking with CPCM@La 2 O 2 CO 3 that coated the material surface during compounding, the distinctive peaks of the Fe 3 O 4 phase were more prominent.…”

Section: Resultsmentioning

confidence: 59%

Construction of Lanthanide Magnetic Bio-Based Porous Carbon Materials with Beam and Column Structure and Its Synergistic Adsorption Performance

Zhang,

Guo,

Jia

et al. 2023

ACS Appl. Mater. Interfaces

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Biochar porous carbon material (BPCM) has extraordinary adsorption properties and is being widely used in different fields around the world. The pore structure of BPCM is liable to collapse, and mechanical properties are inferior; hence, the focus is on developing a new ″powerful″ structure of functional BPCM. Rare earth elements with characteristic f orbitals are used as pore and wall strengthening units in this work. The new ″beam and column structure″ BPCM was synthesized by the aerothermal method, and then, the magnetic BPCM was prepared. The results showed that the designed synthesis route was reasonable, BPCM with a steady-state beam and column structure was attained, and the La element played a stabilizing role in maintaining the overall BPCM. The La hybridization exhibits the characteristic of ″the stronger column and weaker beam″, and the La group is the ″column″ to strengthen the BPCM as the ″beam″. The functionalized BPCM (lanthanum-loaded magnetic chitosan-based porous carbon materials, MCPCM@La2O2CO3) obtained exhibited a transcendent efficient adsorption capacity with an average adsorption rate of 6.640 mg·g–1·min–1 and over 85% removal of different types of dye pollutants, which exceeded the adsorption performance of the materials of most other BPCMs. Ultrastructural analysis revealed that MCPCM@La2O2CO3 has a huge specific surface area of 1458.513 m2·g–1 and a magnetization value of 16.560 emu·g–1 for MCPCM@La2O2CO3. A new theoretical model for the adsorption of MCPCM@La2O2CO3 (multiple adsorption coexistence equation) was established. The theoretical equations clarify that the mechanism of pollutant removal by MCPCM@La2O2CO3 is different from the traditional adsorption model, presenting a mechanism of coexistence of multiple adsorption types, displaying a monolayer–multilayer adsorption mechanism, influenced by the synergistic effects of H bonding, electrostatic attraction, π–π conjugation, and ligand interaction. The rapid coordination of the d orbitals of La is an obvious factor in enhancing the adsorption efficiency.

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“…From the stabilized COD and UV 254 removal rates, it can be deduced that excessive catalyst dosage hindered the generation of •OH, which converted into without catalytic ability. Besides, as the number of O 3 molecules per unit volume of the solution was fixed, increasing the catalyst dosage failed to make the O 3 in the bubbles come into sufficient contact with the active sites on the catalyst surface [41,60]. It can also be seen that the COD and UV 254 removal rates were not linear related with the increase of catalyst dosage, but there existed a critical value [60].…”

Section: Effect Of Catalyst Dosagementioning

confidence: 99%

“…Besides, as the number of O 3 molecules per unit volume of the solution was fixed, increasing the catalyst dosage failed to make the O 3 in the bubbles come into sufficient contact with the active sites on the catalyst surface [41,60]. It can also be seen that the COD and UV 254 removal rates were not linear related with the increase of catalyst dosage, but there existed a critical value [60]. Therefore, from the perspectives of both cost efficiency and treatment performance, 3.0 g/L was used as the optimal catalyst dosage in the subsequent experiments.…”

Section: Effect Of Catalyst Dosagementioning

confidence: 99%

Study on Treatment of Basic Yellow 28 dye Wastewater by Micro-nano Bubble Ozone Catalytic Oxidation

Wang¹,

Sha²,

Wang³

2023

Environmental Engineering Research

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Mn loaded AC (Mn/AC), Cu loaded AC (Cu/AC), and Fe loaded AC (Fe/AC) catalysts were prepared by the impregnation-calcination method, which can be used to degrade Basic Yellow 28 dyes in simulated printing and dyeing wastewater for catalytic ozonation. The catalyst preparation and reaction conditions were optimized with the degradation efficiency of chemical oxygen demand (COD) and the absorbance of some organic compounds under 254 nm UV light (UV254) as indicators. The surface structure, specific surface area, and active component distribution of the catalysts were analyzed by scanning electron microscopy (SEM), nitrogen adsorption, and X-ray diffraction (XRD) characterization. Results indicated that Mn was the best active component, and a catalyst dosage of 3.5 g/L, an initial pH of 9.4, and an initial temperature of 31.7°C were the best reaction parameters to degrade Basic Yellow 28 dyes. After five recycling experiments, the catalysts could retain a relatively stable catalytic effect. Furthermore, this study can be informative for the sustainable development of future catalysts.

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Insights into mechanism of catalytic ozonation of cinnamyl alcohol over core–shell Fe3O4@SiO2@La2O3 catalyst

Cited by 29 publications

References 42 publications

Catalytic aerobic oxidation of lignin-based vanillyl alcohol under base–free conditions over an efficient and reusable LaFeO₃ perovskite for vanillin production

Catalytic aerobic oxidation of lignin-based vanillyl alcohol under base–free conditions over an efficient and reusable LaFeO₃ perovskite for vanillin production

Construction of Lanthanide Magnetic Bio-Based Porous Carbon Materials with Beam and Column Structure and Its Synergistic Adsorption Performance

Study on Treatment of Basic Yellow 28 dye Wastewater by Micro-nano Bubble Ozone Catalytic Oxidation

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Insights into mechanism of catalytic ozonation of cinnamyl alcohol over core–shell Fe3O4@SiO2@La2O3 catalyst

Cited by 29 publications

References 42 publications

Catalytic aerobic oxidation of lignin-based vanillyl alcohol under base–free conditions over an efficient and reusable LaFeO3 perovskite for vanillin production

Catalytic aerobic oxidation of lignin-based vanillyl alcohol under base–free conditions over an efficient and reusable LaFeO3 perovskite for vanillin production

Construction of Lanthanide Magnetic Bio-Based Porous Carbon Materials with Beam and Column Structure and Its Synergistic Adsorption Performance

Study on Treatment of Basic Yellow 28 dye Wastewater by Micro-nano Bubble Ozone Catalytic Oxidation

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About

Catalytic aerobic oxidation of lignin-based vanillyl alcohol under base–free conditions over an efficient and reusable LaFeO₃ perovskite for vanillin production

Catalytic aerobic oxidation of lignin-based vanillyl alcohol under base–free conditions over an efficient and reusable LaFeO₃ perovskite for vanillin production