Synthesis and characterisation of mesoporous hybrid silica-polyoxometalate aerogels for photocatalytic degradation of rhodamine B and methylene blue

Yahya, Fatima; El-Rassy, Houssam; Younes, Ghassan; Al‐Oweini, Rami

doi:10.1080/03067319.2019.1622010

Cited by 25 publications

(6 citation statements)

References 82 publications

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“…The synergistic effect of Lewis acid of some silicates and Bronsted acid of POM to enhance the degradation activity is the unique advantage of polyoxometalates modified by silicate loading method. Yahya et al [36] successfully prepared mesoporous silica aerosol/polyoxometalates salt H 3 PW 12 O 40 composite photocatalyst under mild conditions. The prepared catalyst was characterized by FTIR, TGA, XRD, UV-Vis, AAS, BET, SEM and EDX.…”

Section: Modified Polyoxometalates By Loading Methods and Its Applica...mentioning

confidence: 99%

Research progress of polyoxometalates photocatalyst for degradation of organic wastewater

Peng

et al. 2022

ACE

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Polyoxometalate (POM) is an eco-friendly solid acid. It is a polyatomic anion containing transition metal (group Ⅴ or group Ⅵ) oxyanions, which are connected by common oxygen atoms. In addition to the advantages of other photocatalysts, such as non-toxic, no secondary pollution, convenient, fast and efficient, it also has the characteristics of high oxygen rich surface, and because there are a large number of metal centers in its structure, it can show rapid reversible and multi electron redox transformation. Its band gap is narrow, and the spectral response range is wide. It has excellent photocatalytic degradation performance, and has been widely used in photocatalytic degradation of wastewater containing organic pollutants. In this paper, the types of polyoxometalates photocatalysts, the modification methods of polyoxometalates and the application of polyoxometalates and its compounds in the degradation of organic pollutants are reviewed. The prominent problems and corresponding solutions of polyoxometalates photocatalytic degradation technology at present are pointed out, and its future development direction is prospected.

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Section: Modified Polyoxometalates By Loading Methods and Its Applica...mentioning

confidence: 99%

Research progress of polyoxometalates photocatalyst for degradation of organic wastewater

Peng

et al. 2022

ACE

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“…Combining the structural features of POMs and organic components, various supramolecular interactions can be used for preparing POM-containing gels. [42][43][44] As an intrinsic feature of polyanionic cluster, the electrostatic attraction deserves to be the main driving force to build ordered structures, which requires the introduction of organic parts with positive charges. [45] To date, many POM-containing gels have been constructed based on this strategy by using cationic surfactants, cationic ionic liquids, polymers, and zwitterions as organic components.…”

Section: Supramolecular Interactions In Pom-containing Gelsmentioning

confidence: 99%

Polyoxometalate‐Containing Supramolecular Gels

Xuan

2022

Macromol. Rapid Commun.

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Supramolecular gels are important soft materials with various applications, which are fabricated through hydrogen bonding, π–π stacking, electrostatic interactions, or host–guest interactions. Introducing functional groups, especially inorganic components, is an efficient strategy to obtain gels with robust architecture and high performance. Polyoxometalates (POMs), as a class of negatively‐charged clusters, have defined structures and multiple interaction sites, resulting in their potential as building blocks for constructing POM‐containing supramolecular gels. The introduction of POMs into gels not only provides strong driving forces for the formation of gels due to the characteristics of charged cluster and oxygen‐rich surface, but also brings new properties sourcing from the unique electronic structures of POMs. Though many POM‐containing gels have been reported, a comprehensive review is still absent. Herein, the concept of POM‐containing gels is discussed, following with the design strategies and driving forces. To better understand the results in the literature, detailed examples, which are classified into several categories based on the types of organic components, are presented to illustrate the gelation process and gel structures. Moreover, applications of POM‐containing gels in energy chemistry, sustainable chemistry, and other aspects are also reviewed, as well as the future developments of this field.

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“…Photocatalysis utilizing semiconductors is a well‐known technology for contaminants decomposition in both aqueous and non‐aqueous systems [35–37] . For pollutant removal, many photocatalysts, such as TiO 2 , ZnO, CuS, and CdS, have been used [38–41] …”

Section: Introductionmentioning

confidence: 99%

“…[32][33][34] Photocatalysis utilizing semiconductors is a well-known technology for contaminants decomposition in both aqueous and non-aqueous systems. [35][36][37] For pollutant removal, many photocatalysts, such as TiO 2 , ZnO, CuS, and CdS, have been used. [38][39][40][41] Among these photocatalysts, TiO 2 nanoparticles are the most widely studied [42][43][44][45] and used for their attractive properties, such as good photocatalytic properties, little toxicology, availability, inexpensiveness, stability against chemical and photo-corrosion, high turnover, complete mineralization of organic pollutants, and significant oxidizing ability.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Epoxy Paint Based on TiO₂ for the Decontamination of Water under Visible LED and Sunlight Irradiation

Chawraba,

Medlej,

Noun

et al. 2024

ChemistrySelect

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Semiconductor oxides such as titanium dioxide (TiO2) have been used as photocatalysts for removing contaminants. In addition, TiO2 nanoparticles in suspension form are difficult to recover and recycle, and they are expensive. In our work, titanium dioxide has been immobilized on a commercially available, thermally stable, chemically stable, and cheap polymer. The nanocomposite is synthesized with varying percentages of TiO2, 0.25, 0.5, and 1 weight percent. The obtained nanocomposites were characterized, and the effect of the process parameter (i. e., initial concentration of MB, amount of catalyst, light wavelength, and power of light) was investigated. Also, the results show good photodegradation of MB by the TiO2‐epoxy nanocomposite. The decomposition of 10 ppm methylene blue (MB) during 200 min under 25 W visible LED irradiation can reach 95 %. This value is higher than that obtained with pristine TiO2, which does not have photocatalytic activity under LED light. The antibacterial activity of nanocomposites concerning Escherichia coli and Stephalocous aureus was studied, and an inhibition zone of 2 cm and 3.5 cm was obtained, respectively. Therefore, the TiO2‐epoxy nanocomposite was applied to a glass jar and tested after four months for the degradation of methylene blue (5 ppm) and methyl orange (8 ppm) under sunlight. The paint demonstrated good photocatalytic efficiency of 41 % and 72 % within 310 min, respectively.

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Synthesis and characterisation of mesoporous hybrid silica-polyoxometalate aerogels for photocatalytic degradation of rhodamine B and methylene blue

Cited by 25 publications

References 82 publications

Research progress of polyoxometalates photocatalyst for degradation of organic wastewater

Research progress of polyoxometalates photocatalyst for degradation of organic wastewater

Polyoxometalate‐Containing Supramolecular Gels

Photocatalytic Epoxy Paint Based on TiO₂ for the Decontamination of Water under Visible LED and Sunlight Irradiation

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Synthesis and characterisation of mesoporous hybrid silica-polyoxometalate aerogels for photocatalytic degradation of rhodamine B and methylene blue

Cited by 25 publications

References 82 publications

Research progress of polyoxometalates photocatalyst for degradation of organic wastewater

Research progress of polyoxometalates photocatalyst for degradation of organic wastewater

Polyoxometalate‐Containing Supramolecular Gels

Photocatalytic Epoxy Paint Based on TiO2 for the Decontamination of Water under Visible LED and Sunlight Irradiation

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Product

Resources

About

Photocatalytic Epoxy Paint Based on TiO₂ for the Decontamination of Water under Visible LED and Sunlight Irradiation