Commercial aluminum oxides with different crystalline structures efficient for the mineralization of phenolic pollutants

Piña-Pérez, Yanet; Aguilar-Martínez, Octavio; Oros-Ruíz, Socorro; Gómez, R.; Tzompantzi, Francisco

doi:10.1016/j.jphotochem.2017.11.051

Cited by 10 publications

(4 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…OH radicals were produced during the photocatalytic reactions a study was carried out. For this, coumarin was used as a probe molecule, as detailed in previous research [41] . The photolysis reaction and a reaction using TiO 2 P25‐Degussa commercial catalyst were also carried out as reference reactions, see Figure 9, for TiO 2 P‐25 Degussa reaction there was a significant increase in the signal associated to the formation of .…”

Section: Resultsmentioning

confidence: 99%

“…For this, coumarin was used as a probe molecule, as detailed in previous research. [41] The photolysis reaction and a reaction using TiO 2 P25-Degussa commercial catalyst were also carried out as reference reactions, see Figure 9, for TiO 2 P-25 Degussa reaction there was a significant increase in the signal associated to the formation of * OH radicals (at 462 nm) as a function of the reaction time, indicating that one of the main oxidizing species generated by this photocatalyst are hydroxyl radicals. In contrast, using the synthesized materials it is clearly observed that the intensity is very similar to the photolysis reaction, clearly indicating that there is no formation of * OH radicals when irradiated by UV light.…”

Section: Photocatalytic Behavior and Reaction Mechanismmentioning

confidence: 99%

See 1 more Smart Citation

Effect of the Oxygen Vacancies in CeO₂ by the Ce³⁺ Incorporation to Enhance the Photocatalytic Mineralization of Phenol

et al. 2021

Self Cite

View full text Add to dashboard Cite

In this paper, the phenol mineralization by Ce 3 + -doped CeO 2 by photocatalysis at room temperature, is shown for the first time. The photocatalytic behavior of CeO 2 was improved through the incorporation of Ce 3 + into its crystalline lattice. The materials were prepared by the precipitation method at low temperatures varying the Ce 4 + :Ce 3 + molar ratio of the precursors during the synthesis process. It is worth noting that, the synthesized photocatalysts did not carry out a thermal treatment after their preparation. The results obtained from Raman analysis demonstrated the formation of oxygen vacancies by the incorporation of Ce 3 + . The improvement of the photocatalytic activity was attributed to an optimal content of Ce 3 + which promoted structural defects (such as oxygen vacancies). Radical species, such as O 2 * À , are mainly formed during the photocatalytic process, which are probably the main responsible for inducing the mineralization process of the studied pollutant.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Photocatalytic Behavior and Reaction Mechanismmentioning

confidence: 99%

Effect of the Oxygen Vacancies in CeO₂ by the Ce³⁺ Incorporation to Enhance the Photocatalytic Mineralization of Phenol

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…This band has been attributed to the electronic transitions of the valence band, derived from the O 2p states, to the conduction band of the Al 3s and 3p states (Al 3+ ← O 2− , OH − ). 41,42 The band gap of the bulk alumina has a value near 8.7 eV, characteristic of an insulator material. 43 Therefore, the DRS for the Al sample points to the structure defects (amorphous) and hydroxyl groups on the surface, 44,45 consistent with the XRD profile presented in Fig.…”

Section: Structural Features By Xrd Ftir and Diffuse Reflectance Uv-v...mentioning

confidence: 99%

Effect of Cu and Sb active sites on the acid–base properties and reactivity of hydrated alumina for glycerol conversion by dehydrogenation and dehydration reactions

Santos

Silva

Nunes

et al. 2023

Catal. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Additionally, while γ-alumina is a porous alumina and has a large surface area with acidic properties, α-alumina has a very low surface area and is virtually completely impermeable. As a result, the γ phase is frequently utilized as catalyst support for the adsorption of different metals or metal oxides to offer catalytic properties, while α phase is utilized as a ceramic material 21 , 22 . Hence, based on the differences in surface area and activity between the two phases, the γ phase would be significantly more suitable for the development of TF nanocomposites (TFN) membranes.…”

Section: Introductionmentioning

confidence: 99%

Boosting brackish water treatment via integration of mesoporous γ-Al2O3NPs with thin-film nanofiltration membranes

Hassan

Al–Shemy

Adel

et al. 2022

Sci Rep

View full text Add to dashboard Cite

In this study, a simple method based on non-ionic surfactant polysorbates-80 was used to create mesoporous γ-Al2O3NPs. The properties of the prepared mesoporous alumina nanoparticles (Al2O3NPs) were verified using ATR-FTIR, XRD, SEM, TEM, DLS, and BET surface area analysis. Then, thin-film nanocomposite (TFN) nanofiltration membranes were fabricated by interfacial polymerization of embedded polyamide layers with varied contents (0.01 to 0.15 wt.%) of mesoporous γ-Al2O3NPs. The surface roughness, porosity, pore size, and contact angle parameters of all the prepared membranes were also determined. The performance of the fabricated membranes was investigated under various mesoporous γ-Al2O3NPs loads, time, and pressure conditions. Mesoporous γ-Al2O3NPs revealed an important role in raising both the membrane hydrophilicity and the surface negativity. The addition of 0.03 wt.% mesoporous γ-Al2O3NPs to the TFN membrane increased water flux threefold compared to the TF control (TFC) membrane, with maximum water flux reaching 96.5, 98, 60, and 52 L/(m2.h) for MgSO4, MgCl2, Na2SO4, and NaCl influent solutions, respectively, with the highest salt rejection of 96.5%, 92.2%, 98.4%. The TFN-Al2O3 membrane was also able to soften water and remove polyvalent cations such as Mg2+ with a highly permeable flux. The TFN-Al2O3 membrane successfully removed the hardness of the applied water samples below the WHO limit compared to using merely the TFC membrane. Furthermore, the TFN-Al2O3 nanofiltration membrane unit proved to be a promising candidate for the desalination of real brine like that collected from the Safaga area, Egypt.

show abstract

Commercial aluminum oxides with different crystalline structures efficient for the mineralization of phenolic pollutants

Cited by 10 publications

References 42 publications

Effect of the Oxygen Vacancies in CeO₂ by the Ce³⁺ Incorporation to Enhance the Photocatalytic Mineralization of Phenol

Effect of the Oxygen Vacancies in CeO₂ by the Ce³⁺ Incorporation to Enhance the Photocatalytic Mineralization of Phenol

Effect of Cu and Sb active sites on the acid–base properties and reactivity of hydrated alumina for glycerol conversion by dehydrogenation and dehydration reactions

Boosting brackish water treatment via integration of mesoporous γ-Al2O3NPs with thin-film nanofiltration membranes

Contact Info

Product

Resources

About

Commercial aluminum oxides with different crystalline structures efficient for the mineralization of phenolic pollutants

Cited by 10 publications

References 42 publications

Effect of the Oxygen Vacancies in CeO2 by the Ce3+ Incorporation to Enhance the Photocatalytic Mineralization of Phenol

Effect of the Oxygen Vacancies in CeO2 by the Ce3+ Incorporation to Enhance the Photocatalytic Mineralization of Phenol

Effect of Cu and Sb active sites on the acid–base properties and reactivity of hydrated alumina for glycerol conversion by dehydrogenation and dehydration reactions

Boosting brackish water treatment via integration of mesoporous γ-Al2O3NPs with thin-film nanofiltration membranes

Contact Info

Product

Resources

About

Effect of the Oxygen Vacancies in CeO₂ by the Ce³⁺ Incorporation to Enhance the Photocatalytic Mineralization of Phenol

Effect of the Oxygen Vacancies in CeO₂ by the Ce³⁺ Incorporation to Enhance the Photocatalytic Mineralization of Phenol