Nanoscale Hierarchically Porous Metal–Organic Frameworks: Facile Synthesis, Mechanism Research, and Application

Li, Feier; Zheng, Ke; Zhang, Hang; Duan, Chongxiong; Xi, Hongxia

doi:10.1021/acssuschemeng.8b06560

Cited by 22 publications

(14 citation statements)

References 54 publications

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“…The textural properties of hierarchical porous ZIF-90_X and C-ZIF-90 are summarized in Table 1. All ZIF-90_X samples exhibited higher BET surface areas (S BET ) and Langmuir surface areas (S Langmuir ) than C-ZIF-90, which can be attributed to the decrease in the crystal size can increase surface areas [36]. Furthermore, all ZIF-90_X showed higher total pore volumes (V total ) and mesopore volumes (V meso ) than C-ZIF-90, confirming the generation of mesopores and macropores in ZIF-90_X samples.…”

Section: Resultsmentioning

confidence: 75%

Facile fabrication of nanoscale hierarchical porous zeolitic imidazolate frameworks for enhanced toluene adsorption capacity

et al. 2020

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The development of a simple and facile synthesis route is a highly desirable but challenging process in the fabrication of nanoscale hierarchical porous zeolitic imidazolate frameworks (ZIFs). Herein we describe a facile method for rapidly synthesizing hierarchically porous ZIF-90 nanocrystals (particle sizes of * 300 nm) using hydroxyl double salts as intermediates at room temperature. The as-synthesized ZIF-90 contained hierarchical porous structures developed using a crystalline interior and a random stack of multiple nanoparticles. Both the morphology and particle size of ZIF-90 nanocrystals could be tuned by controlling the molar ratio of ICA/Zn 2? . Note that the as-synthesized hierarchically porous ZIF-90 nanocrystals exhibited higher thermal stability compared with the conventional ZIF-90. Because of the introduction of hierarchical porous structures, the resultant hierarchically porous ZIF-90 nanocrystals showed enhanced toluene adsorption capacity than those of conventional metal organic frameworks and zeolites.

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Section: Resultsmentioning

confidence: 75%

Facile fabrication of nanoscale hierarchical porous zeolitic imidazolate frameworks for enhanced toluene adsorption capacity

et al. 2020

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“…The adsorption of malachite green on a range of MOFs has been reported [ 59 , 60 , 61 , 62 ]. Table 3 summarizes the data from studies relevant to the present work.…”

Section: Discussionmentioning

confidence: 99%

“…Li et al found that the absorption capacity of MIL-53(Al) increased after functionalization with amino groups [ 59 ], an increase that can be attributed to hydrogen bond interactions [ 62 ] between the amino groups of the dye molecules and the amino groups of MIL-53(Al)-NH 2 ; the adsorption capacity achieved by this system is, however, rather low (45.2 mg/g in the case of methylene blue and 37.8 mg/g in the case of malachite green). Jin et al prepared a ZIF-67 MOF integrated on a polyacrylonitrile membrane to recover the MOF from water solution at the end of the adsorption process [ 61 ].…”

Section: Discussionmentioning

confidence: 99%

Adsorption of Malachite Green and Alizarin Red S Dyes Using Fe-BTC Metal Organic Framework as Adsorbent

Delpiano¹,

Tocco²,

Medda

et al. 2021

IJMS

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Synthetic organic dyes are widely used in various industrial sectors but are also among the most harmful water pollutants. In the last decade, significant efforts have been made to develop improved materials for the removal of dyes from water, in particular, on nanostructured adsorbent materials. Metal organic frameworks (MOFs) are an attractive class of hybrid nanostructured materials with an extremely wide range of applications including adsorption. In the present work, an iron-based Fe-BTC MOF, prepared according to a rapid, aqueous-based procedure, was used as an adsorbent for the removal of alizarin red S (ARS) and malachite green (MG) dyes from water. The synthesized material was characterized in detail, while the adsorption of the dyes was monitored by UV-Vis spectroscopy. An optimal adsorption pH of 4, likely due to the establishment of favorable interactions between dyes and Fe-BTC, was found. At this pH and at a temperature of 298 K, adsorption equilibrium was reached in less than 30 min following a pseudo-second order kinetics, with k″ of 4.29 × 10−3 and 3.98 × 10−2 g∙mg−1 min−1 for ARS and MG, respectively. The adsorption isotherm followed the Langmuir model with maximal adsorption capacities of 80 mg∙g−1 (ARS) and 177 mg∙g−1 (MG), and KL of 9.30·103 L∙mg−1 (ARS) and 51.56·103 L∙mg−1 (MG).

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“…ZIF-300 membrane exhibited 99.21% rejection of heavy metal ions and large water permeate flux, 39.2 L/m 2 •h•bar. Another structure of ZIF having nanoscale hierarchically pores, ZIF-67 (NH-ZIF-67), was developed using a rapid process by employing an organic amine as a biofunctional modulator and accelerator of the nucleation (Li et al, 2019b). This study reflected high rates of adsorption of malachite green (MG) as well as high adsorption capacity of toluene.…”

Section: Summary Of Zif Synthesis and Applicationsmentioning

confidence: 99%

A review on zeolitic imidazolate frameworks use for crude oil spills cleanup

Shahmirzaee

Hemmati-Sarapardeh

Husein

et al. 2019

Adv. Geo-Energ. Res.

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Oil spills are a global concern by virtue of their distractive effects on the ecosystem. Many studies have examined the use of porous materials as sorbents for contaminants from different polluted waters. For example, hydrophobic metal organic frameworks, especially zeolitic imidazolate frameworks (ZIFs) with high porosity, have attracted lots of attention. ZIFs are a subclass of metal organic frameworks and display an excellent performance toward oil/water separation compared with other porous materials. Nevertheless, the performance of ZIFs toward oil spills cleanup has not been reviewed. Accordingly, this article overviews the different methods for ZIF preparation, their corresponding structure, and their various applications as sorbents and in particular, recent developments in cleaning up oil spills with meso and micro-porous ZIFs. The investigation of the literatures revealed that the effective parameters on the performance of porous ZIFs are specific surface area, pore diameters of ZIF, and the size of cavities due to interconnecting of ZIF particles. The ZIF-8 with a high surface area of 1408 m 2 /g and 1384.2 m 2 /g and adsorption capacity up to 3000 mg/g was studied more than the other ZIF structures. Models predications revealed the maximum adsorption capacity of 6633 mg/g for ZIF-8. Recently, investigations focused on carbonitride foam and melamine sponge as templates of ZIF powder. In comparison with synthesis methods, dip coating as a facial synthesis method was introduced for production and anchoring ZIF particles on the substrate. The recyclability of crude oil and the reusability of the ZIF sorbents are highlighted. Moreover, this article reviews recent developments of ZIFs synthesis, current challenges, and prospects for the use of ZIFs in oil/water separation. The findings of this study can help to better understand widespread applications of ZIFs, effective features of a sorbent, and methods to improve adsorption capacity. As cleaning up oil spills is known as an important issue, this is the first study on ZIFs in particular oil/water separation which provides a summary of researches in a simple form along with recent developments compared to published reviews.

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Nanoscale Hierarchically Porous Metal–Organic Frameworks: Facile Synthesis, Mechanism Research, and Application

Cited by 22 publications

References 54 publications

Facile fabrication of nanoscale hierarchical porous zeolitic imidazolate frameworks for enhanced toluene adsorption capacity

Facile fabrication of nanoscale hierarchical porous zeolitic imidazolate frameworks for enhanced toluene adsorption capacity

Adsorption of Malachite Green and Alizarin Red S Dyes Using Fe-BTC Metal Organic Framework as Adsorbent

A review on zeolitic imidazolate frameworks use for crude oil spills cleanup

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