Rapid Room-Temperature Preparation of Hierarchically Porous Metal–Organic Frameworks for Efficient Uranium Removal from Aqueous Solutions

Duan, Chongxiong; Zhang, Yi; Li, Jiexin; Kang, Le; Xie, Yawei; Qiao, Wenming; Zhu, Chen; Luo, Haochuan

doi:10.3390/nano10081539

Cited by 21 publications

(7 citation statements)

References 54 publications

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“…Hierarchically porous MOFs (H-MOFs) with tunable porosity have emerged as attractive catalysts with high catalytic efficiencies [21][22][23]. With regards to heterogeneous catalysis, hierarchically porous structures are superior to their conventional microporous counterparts due to the following three aspects: (i) the total porosity of the hierarchically porous material is higher due to the introduced mesoporosity and preserved microporosity, which provides more active sites [24,25]; (ii) the sizes of the pores are big enough to allow the access of large reactant molecules to diffuse into, and a large amount of product molecules can also easily move out of the network [26,27]; (iii) hierarchical environment allows catalytic multifunctional modification by encapsulating metal nanoparticles (MNPs), polyoxometalates (POMs), and macromolecules (e.g., porphyrins).…”

Section: Introductionmentioning

confidence: 99%

Application of hierarchically porous metal-organic frameworks in heterogeneous catalysis: A review

et al. 2021

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Hierarchically porous metal-organic frameworks (H-MOFs) with micro-, meso-and macropores have emerged as a popular class of crystalline porous materials that have attracted extensive interests, and they have been studied in diverse applications, especially in heterogeneous catalysis. The hierarchical structures enable sufficient diffusion and accessibility to the active sites of the molecules and permit the encapsulation of catalytic guest molecules to exploit more possibilities with enhanced catalytic performance. In this review, we have summarized the recent representative developments of H-MOFs in the field of heterogeneous catalysis, which includes oxidation reaction, hydrogenation reaction, and condensation reaction. Emphasis is placed on the multiple functions of hierarchical structures, and the catalytic activity, selectivity, stability, recyclability, etc. of the industrial utility of H-MOFs. Finally, the prospects and challenges of H-MOFs in heterogeneous catalysis and the remaining issues in this field are presented.

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Section: Introductionmentioning

confidence: 99%

Application of hierarchically porous metal-organic frameworks in heterogeneous catalysis: A review

et al. 2021

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“…The removal of glyphosate in water mainly includes the chemical method, biological method, membrane separation method, and adsorption method . Among the above methods, the adsorption method has the advantages of simple process, convenient operation, high removal efficiency, and less secondary pollution . The selection of adsorption material is the key factor affecting the adsorption efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…1 Among the above methods, the adsorption method has the advantages of simple process, convenient operation, high removal efficiency, and less secondary pollution. 2 The selection of adsorption material is the key factor affecting the adsorption efficiency. The adsorbents for glyphosate removal include zeolite, activated carbon, kaolin, metal organic framework materials, and hydrotalcite and its calcined product.…”

Section: ■ Introductionmentioning

confidence: 99%

Effect of Preparation Methods on the Adsorption of Glyphosate by Calcined Ca–Al Hydrotalcite

2021

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Calcined Ca−Al hydrotalcites were prepared by the clean method (Ca-LDO-1) and traditional co-precipitation method (Ca-LDO-2), respectively. The effect of the preparation method on the adsorption of glyphosate by calcined Ca−Al hydrotalcites was investigated. The adsorbents were also characterized by X-ray diffraction (XRD), thermogravimetric (TG) analysis, inductively coupled plasma optical emission spectroscopy (ICP-OES), and low-temperature N 2 adsorption− desorption, respectively. Compared with Ca-LDO-2, Ca-LDO-1 had higher specific surface area and pore volume, which caused it to show better adsorption performance and reusability for the adsorbing of glyphosate. In addition, the kinetics and thermodynamics of the adsorption of glyphosate by Ca-LDO-1 were studied. The results showed that it was more consistent with the pseudo-secondorder kinetic equation and Langmuir isotherm equation.

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“…Metal–organic frameworks (MOFs) including other materials have been extensively employed in diverse application areas such as environments, adsorbents, organic light emitting displays, sensors and catalysts [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 ]. Among diverse MOFs, the zeolitic imidazolate framework (ZIF) exhibits zeolite-like topologies where imidazolate linkers are connected with tetrahedrally coordinated transition metal ions such as Co and Zn [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 ]. In this ZIF-class, ZIF-67 has Co-N tetrahedral coordination commonly synthesized with Co(II) precursor and 2-methylimidazole [ 5 , 6 , 7 , 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

“…As discussed in the literature, many strategies have been employed and the consequent materials have been tested in various application areas [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 ]. Motivated by this, we seek to further widen the synthesis of ZIP-derivatized catalyst materials and examine new physicochemical properties of a newly synthesized material.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic and Electrocatalytic Properties of Cu-Loaded ZIF-67-Derivatized Bean Sprout-Like Co-TiO2/Ti Nanostructures

et al. 2021

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ZIF-derivatized catalysts have shown high potential in catalysis. Herein, bean sprout-like Co-TiO2/Ti nanostructures were first synthesized by thermal treatment at 800 °C under Ar-flow conditions using sacrificial ZIF-67 templated on Ti sheets. It was observed that ZIF-67 on Ti sheets started to thermally decompose at around 350 °C and was converted to the cubic phase Co3O4. The head of the bean sprout structure was observed to be Co3O4, while the stem showed a crystal structure of rutile TiO2 grown from the metallic Ti support. Cu sputter-deposited Co-TiO2/Ti nanostructures were also prepared for photocatalytic and electrocatalytic CO2 reduction performances, as well as electrochemical oxygen reaction (OER). Gas chromatography results after photocatalytic CO2 reduction showed that CH3OH, CO and CH4 were produced as major products with the highest MeOH selectivity of 64% and minor C2 compounds of C2H2, C2H4 and C2H6. For electrocatalytic CO2 reduction, CO, CH4 and C2H4 were meaningfully detected, but H2 was dominantly produced. The amounts were observed to be dependent on the Cu deposition amount. Electrochemical OER performances in 0.1 M KOH electrolyte exhibited onset overpotentials of 330–430 mV (vs. RHE) and Tafel slopes of 117–134 mV/dec that were dependent on Cu-loading thickness. The present unique results provide useful information for synthesis of bean sprout-like Co-TiO2/Ti hybrid nanostructures and their applications to CO2 reduction and electrochemical water splitting in energy and environmental fields.

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Rapid Room-Temperature Preparation of Hierarchically Porous Metal–Organic Frameworks for Efficient Uranium Removal from Aqueous Solutions

Cited by 21 publications

References 54 publications

Application of hierarchically porous metal-organic frameworks in heterogeneous catalysis: A review

Application of hierarchically porous metal-organic frameworks in heterogeneous catalysis: A review

Effect of Preparation Methods on the Adsorption of Glyphosate by Calcined Ca–Al Hydrotalcite

Photocatalytic and Electrocatalytic Properties of Cu-Loaded ZIF-67-Derivatized Bean Sprout-Like Co-TiO2/Ti Nanostructures

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