Sustainable synthesis of a new semiamorphous Ti-BDC MOF material and the photocatalytic performance of its ternary composites with Ag3PO4 and g-C3N4

Yassin, Jemal M.; Taddesse, Abi M.; Sánchez‐Sánchez, Manuel

doi:10.1016/j.apsusc.2021.151996

Cited by 30 publications

(8 citation statements)

References 89 publications

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“…One of the most successful strategies to synthesize carboxylate-based MOFs under completely sustainable conditions has been developed by our group, and consists of the use of salts as linker precursors or, the same as in water, using a stoichiometric amount of deprotonating agents [ 31 , 32 , 33 , 34 , 35 , 36 , 37 ]. This leads to a synthesis methodology of MOFs under conditions that are almost impossible to improve from a sustainability point of view, including no energy input, room temperature, water as the unique solvent, low cost of the reactants, high availability of the reactants, low toxicity, no generation of (toxic) by-products, quick kinetics, high yield, no special bakers, high-quality MOFs and a stoichiometry process, the latter being a very pertinent characteristic for the aim of this work.…”

Section: Introductionmentioning

confidence: 99%

“…This leads to a synthesis methodology of MOFs under conditions that are almost impossible to improve from a sustainability point of view, including no energy input, room temperature, water as the unique solvent, low cost of the reactants, high availability of the reactants, low toxicity, no generation of (toxic) by-products, quick kinetics, high yield, no special bakers, high-quality MOFs and a stoichiometry process, the latter being a very pertinent characteristic for the aim of this work. In addition, the resultant, immediately formed MOF materials are generally nanocrystalline, as nucleation predominates against crystal growth, which makes these sustainable MOFs very attractive for their use as direct heterogeneous catalysts [ 38 , 39 ], as solid support for immobilizing enzymes [ 35 , 40 , 41 , 42 , 43 , 44 ] or as the base of composites where the interaction between the individual components is prioritized [ 36 , 37 ]. Any tested base, such as NaOH, NH 4 OH or amines (in particular, triethylamine), irrespective of their basic strength, leads to the deprotonation of the linker and the subsequent formation of the corresponding MOF as soon as they are offered a metal in solution [ 40 ].…”

Section: Introductionmentioning

confidence: 99%

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Sustainable Synthesis of Zeolitic Imidazolate Frameworks at Room Temperature in Water with Exact Zn/Linker Stoichiometry

Molina,

Rodríguez-Campa,

Flores-Borrell

et al. 2024

Nanomaterials

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Zeolitic imidazolate frameworks (ZIFs) are widely used MOFs because of certain characteristics, but also because they can be prepared at room temperature using water as the unique solvent. However, these a priori sustainable conditions inevitably entail a huge and somehow unusable excess of linker. Here, we present the formation of ZIFs at room temperature in water, starting from mixtures with a linker/metal ratio of two, that is, coinciding with the stoichiometry found in the final MOFs, in the presence of amines. ZIF-8 can be prepared with triethylamine (TEA), giving a yield of Zn of 96.6%. Other bases, like NaOH, tetraethylammonium hydroxide or ammonium hydroxide, do not lead to ZIF-8 under the same conditions. The so-obtained ZIF-8 contains TEA inside its cavities, making it less porous than its conventionally prepared counterparts. Amine can be removed by mild thermal treatments (200–250 °C). Such thermal treatments induce the generation of g-C3N4-like species which could give added value to these materials as potential photocatalysts, increasing their affinity to CO2, as proved in this work. This methodology can be successfully extended to other amines, like N,N-dicyclohexylmethylamine, as well as to other prepared ZIFs, like Co-based ZIF-67, isostructural to ZIF-8.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sustainable Synthesis of Zeolitic Imidazolate Frameworks at Room Temperature in Water with Exact Zn/Linker Stoichiometry

Molina,

Rodríguez-Campa,

Flores-Borrell

et al. 2024

Nanomaterials

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“…A new form of porous hybrid materials called metal–organic frameworks (MOFs) have attracted significant research interest because of their high surface area, tunable pore structure and composition, high thermal stability, etc. − Over the past decade, numerous MOFs have been prepared for various applications such as adsorption and storage of gases, environmental remediation, , sensing, delivery of drugs, , catalysis, , and separation. , Moreover, MOFs are materials with good porosity and reusability, making them amenable for the adsorptive removal of several contaminants from water environment. − …”

Section: Introductionmentioning

confidence: 99%

Preparation and Adsorption Behavior of Ce(III)-MOF for Phosphate and Fluoride Ion Removal from Aqueous Solutions

Belaye,

Taddesse,

Teju

et al. 2023

ACS Omega

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The discharge of inorganic pollutants like phosphate and fluoride is a cause of mounting concern to the world due to the substantial environmental and human health risk. Adsorption is one of the most common and affordable technologies widely utilized for removing inorganic pollutants such as phosphate and fluoride anions. Investigating efficient sorbents for the adsorption of these pollutants is extremely important and challenging. This work aimed at studying the adsorption efficiency of the Ce(III)-BDC metal–organic framework (MOF) for the removal of these anions from an aqueous solution using a batch mode. Powder X-ray diffraction (XRD), Fourier transform infrared (FTIR), thermogravimetric analysis (TGA), Brunauer–Emmett–Teller (BET), and scanning electron microscopy-energy dispersive X-ray analysis (SEM-EDX) techniques evidenced the successful synthesis of Ce(III)-BDC MOF in water as a solvent without any energy input within a short reaction time. The outstanding removal efficiency of phosphate and fluoride was exhibited at an optimized pH (3, 4), adsorbent dose (0.20, 0.35 g), contact time (3, 6 h), agitation speed (120, 100 rpm), and concentration (10, 15 ppm) for each ion, respectively. The experiment on the effect of coexisting ions demonstrated that SO4 2– and PO4 3– ions are the primary interfering ions in phosphate and fluoride adsorption, respectively, while the HCO3 – and Cl– ions were found to have interfered less. Furthermore, the isotherm experiment showed that the equilibrium data fitted well with the Langmuir isotherm model and the kinetic data correlated well with the pseudo-second-order model for both ions. The results of thermodynamic parameters such as ΔH°, ΔG°, and ΔS° evidenced an endothermic and spontaneous process. The regeneration of the adsorbent made using water and NaOH solution showed the easy regeneration of the sorbent Ce(III)-BDC MOF, which can be reused four times, revealing its potential application for the removal of these anions from aqueous environment.

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“…Consequently, the modification of Ti‐MOFs and the improvement of their photocatalytic performance have been the focus of considerable research attention. Doped metal ions in the metal nodes of MOFs can adjust the energy band structure of MOFs, [16,17] and the construction of heterojunctions can also better stimulate the photocatalytic activity of the catalyst [18] . In addition, using MOFs as precursors after controlled calcination, MOFs‐derived materials with larger specific surface area and smaller pore diameter can be obtained [19] .…”

Section: Introductionmentioning

confidence: 99%

“…Doped metal ions in the metal nodes of MOFs can adjust the energy band structure of MOFs, [16,17] and the construction of heterojunctions can also better stimulate the photocatalytic activity of the catalyst. [18] In addition, using MOFs as precursors after controlled calcination, MOFs-derived materials with larger specific surface area and smaller pore diameter can be obtained. [19] Kai et al, [20] synthesised an organic/inorganic hybrid composite catalyst by coupling Fe 3 O 4 @MIL-100(Fe)(FM) with nano-ZnS by solvothermal evaporation.…”

Section: Introductionmentioning

confidence: 99%

Titanium‐based MOFs‐derived Cabon‐supported Photocatalysts for the Efficient Degradation of Tetracycline

Wang,

Zhang,

Liu

et al. 2023

ChemistrySelect

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In order to eliminate the public health hazard of tetracycline in a more environmentally friendly and efficient manner, a titanium‐based metal‐organic framework material containing Co ions was synthesised as a precursor by the traditional solvothermal method. Subsequently, a series of titanium‐based MOFs‐derived carbon‐supported photocatalysts were synthesised by calcining the precursor at different temperatures in air. All the prepared catalysts achieved effective degradation of the model pollutant tetracycline (TC). By adjusting the parameters such as TC concentration, catalyst dosage and irradiation time, the optimised composite material (TiCoOC‐800‐1) has a degradation rate of 99.4 % for the model pollutant TC with a concentration of 100 mg/L after under the UV irradiation during 30 min. Radical scavenging experiments showed that the main oxide species responsible for the rapid photodegradation of tetracycline were superoxide radicals (⋅O2−) and holes (h+). Finally, the liquid chromatography mass spectrometry (LC–MS) method was used to detect the molecular degradation intermediates of TC and a possible degradation pathway was proposed. This work will provide new ideas for the development of more efficient photocatalysts for the degradation of TC in wastewater.

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Sustainable synthesis of a new semiamorphous Ti-BDC MOF material and the photocatalytic performance of its ternary composites with Ag3PO4 and g-C3N4

Cited by 30 publications

References 89 publications

Sustainable Synthesis of Zeolitic Imidazolate Frameworks at Room Temperature in Water with Exact Zn/Linker Stoichiometry

Sustainable Synthesis of Zeolitic Imidazolate Frameworks at Room Temperature in Water with Exact Zn/Linker Stoichiometry

Preparation and Adsorption Behavior of Ce(III)-MOF for Phosphate and Fluoride Ion Removal from Aqueous Solutions

Titanium‐based MOFs‐derived Cabon‐supported Photocatalysts for the Efficient Degradation of Tetracycline

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