A review: the utilization of mesoporous materials in wastewater treatment

Al-Shehri, Badria M.; Khder, Abd El Rahman S.; Ashour, Sheikha S.; Hamdy, Mohamed S.

doi:10.1088/2053-1591/ab52af

Cited by 31 publications

(14 citation statements)

References 272 publications

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“…For example, silver (Ag) nanoparticles were doped in mesoporous silica materials of different morphology such as KCC-1, SBA-15, and MCM-41, to fabricate Ag/KCC-1. This nano-catalytic system exhibited the enhanced activity as noted in [ 19 , 20 ] as an indication of the influence of support on the catalytic activity of the Ag nanoparticles. In another study, the distribution degree of ruthenium (Ru) nanoparticles into different types (1D, 2D, 3D) of mesoporous silica, to fabricate Ru/SBA-15, Ru/KIT-6, Ru/MCM-41 and Ru/MCM-48 catalytic systems, was conducted to explore variation in CO oxidation [ 21 ].…”

Section: Introductionsupporting

confidence: 60%

Noble Metal Nanoparticles Incorporated Siliceous TUD-1 Mesoporous Nano-Catalyst for Low-Temperature Oxidation of Carbon Monoxide

et al. 2020

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This report, for the first time, demonstrated the low-temperature oxidation of carbon monoxide (CO) using nano-catalysts consisting of noble metal nanoparticles incorporated in TUD-1 mesoporous silica nano-structures synthesized via a one-pot surfactant-free sol–gel synthesis methodology. Herein, we investigated a nano-catalyst, represented as M-TUD-1 (M = Rh, Pd, Pt and Au), which was prepared using a constant Si/M ratio of 100. The outcome of the analytical studies confirmed the formation of a nano-catalyst ranging from 5 to 10 nm wherein noble metal nanoparticles were distributed uniformly onto the mesopores of TUD-1. The catalytic performance of M-TUD-1 catalysts was examined in the environmentally impacted CO oxidation reaction to CO2. The catalytic performance of Au-TUD-1 benchmarked other M-TUD-1 catalysts and a total conversion of CO was obtained at 303 K. The activity of the other nano-catalysts was obtained as Pt-TUD-1 > Pd-TUD-1 > Rh-TUD-1, with a total CO conversion at temperatures of 308, 328 and 348 K, respectively. The Au-TUD-1 exhibited a high stability and reusability as indicated by the observed high activity after ten continuous runs without any treatment. The outcomes of this research suggested that M-TUD-1 are promising nano-catalysts for the removal of the toxic CO gas and can also potentially be useful to protect the environment where a long-life time, cost-effectiveness and industrial scaling-up are the key approaches.

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Section: Introductionsupporting

confidence: 60%

Noble Metal Nanoparticles Incorporated Siliceous TUD-1 Mesoporous Nano-Catalyst for Low-Temperature Oxidation of Carbon Monoxide

et al. 2020

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“…The discovery of many other types of ordered mesoporous materials such as HMS, KIT, FSM-16, as well as SBA types have been reported [97,98]. With a variety of templates, these materials synthesized in either acidic or basic media offered the opportunity to synthesize materials with a tunable pore size [99].…”

Section: Support For Metallic Compositesmentioning

confidence: 99%

Sustainable development and enhancement of cracking processes using metallic composites

et al. 2021

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Metallic composites represent a vital class of materials that has gained increased attention in crude oil processing as well as the production of biofuel from other sources in recent times. Several catalytic materials have been reported in the literature for catalytic cracking, particularly, of crude oil. This review seeks to provide a comprehensive overview of existing and emerging methods/technologies such as metal–organic frameworks (MOFs), metal–matrix composites (MMCs), and catalytic support materials, to bridge information gaps toward sustainable advancement in catalysis for petrochemical processes. There is an increase in industrial and environmental concern emanating from the sulphur levels of oils, hence the need to develop more efficient catalysts in the hydrotreatment (HDS and HDN) processes, and combating the challenge of catalyst poisoning and deactivation; in a bid to improving the overall quality of oils and sustainable use of catalyst. Structural improvement, high thermal stability, enhanced cracking potential, and environmental sustainability represent the various benefits accrued to the use of metallic composites as opposed to conventional catalysts employed in catalytic cracking processes.

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“…Although the use of ligands that are synthesized in the human body would be indicated, they induce limitations regarding the stability and porosity of the final system [ 7 , 8 ]. Mesoporous silica materials (MSMs) are another class of porous materials that are extensively explored as catalysts [ 9 , 10 ], adsorbents for toxic substances [ 11 , 12 , 13 ] and, last but not least, have demonstrated outstanding efficiency in designing novel drug delivery systems [ 14 ]. By virtue of its well-known biocompatibility and lower costs, compared to MOFs, mesoporous silica is somehow preferred by pharmaceutical industry.…”

Section: Introductionmentioning

confidence: 99%

A Comparative Loading and Release Study of Vancomycin from a Green Mesoporous Silica

Dolete

Purcăreanu²,

Mihăiescu

et al. 2022

Molecules

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Since its first use as a drug delivery system, mesoporous silica has proven to be a surprisingly efficient vehicle due to its porous structure. Unfortunately, most synthesis methods are based on using large amounts of surfactants, which are then removed by solvent extraction or heat treatment, leading to an undesired environmental impact because of the generated by-products. Hence, in the present study, we followed the synthesis of a silica material with a wormhole-like pore arrangement, using two FDA-approved substances as templates, namely Tween-20 and starch. As far as we know, it is the first study using the Tween-20/starch combo as a template for mesoporous silica synthesis. Furthermore, we investigated whether the obtained material using this novel synthesis had any potential in using it as a DDS. The material was further analyzed by XRD, TEM, FT-IR, N2 adsorption/desorption, and DLS to investigate its physicochemical features. Vancomycin was selected as the active molecule based on the extensive research engaged towards improving its bioavailability for oral delivery. The drug was loaded onto the material by using three different approaches, assuming its full retention in the final system. Thermal analysis confirmed the successful loading of vancomycin by all means, and pore volume significantly decreased upon loading, especially in the case of the vacuum-assisted method. All methods showed a slower release rate compared to the same amount of the pure drug. Loadings by physical mixing and solvent evaporation released the whole amount of the drug in 140 min, and the material loaded by the vacuum-assisted method released only 68.2% over the same period of time, leading us to conclude that vancomycin was adsorbed deeper inside the pores. The kinetic release of the three systems followed the Higuchi model for the samples loaded by physical mixing and vacuum-assisted procedures, while the solvent evaporation loading method was in compliance with the first-order model.

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A review: the utilization of mesoporous materials in wastewater treatment

Cited by 31 publications

References 272 publications

Noble Metal Nanoparticles Incorporated Siliceous TUD-1 Mesoporous Nano-Catalyst for Low-Temperature Oxidation of Carbon Monoxide

Noble Metal Nanoparticles Incorporated Siliceous TUD-1 Mesoporous Nano-Catalyst for Low-Temperature Oxidation of Carbon Monoxide

Sustainable development and enhancement of cracking processes using metallic composites

A Comparative Loading and Release Study of Vancomycin from a Green Mesoporous Silica

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