A 3D-printed hierarchical porous architecture of MOF@clay composite for rapid and highly efficient dye scavenging

Far, Hossein Shahriyari; Najafi, Moslem; Hasanzadeh, Mahdi; Rahimi, Rahmatollah

doi:10.1039/d2nj05188e

Cited by 19 publications

(4 citation statements)

References 48 publications

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“…A few examples of 3D-filters printed using different types of printers (e.g., FDM, DIW, and DLP) are listed in Table 3 . Previous studies have demonstrated that 3D printing technology is suitable for manufacturing low-cost filters through doping or in situ growth on the surface of support polymers [ 56 , 57 , 58 , 59 ]. Moreover, with the use of direct ink writing (DIW) printers, the desired composite materials can be printed directly through the nozzle by mixing the raw adsorbent materials together with binders [ 60 ].…”

Section: Resultsmentioning

confidence: 99%

Facile Surface Treatment of 3D-Printed PLA Filter for Enhanced Graphene Oxide Doping and Effective Removal of Cationic Dyes

Park

Lee

et al. 2023

Polymers

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The structured adsorption filter material is one of the ways to enhance the practical applicability of powdered adsorbents, which have limitations in the real water treatment process due to difficulty in the separation process. In this study, three-dimensional (3D) printing technology was applied to prepare filter materials for water treatment processes. A 3D-printed graphene-oxide (GO)-based adsorbent is prepared on a polylactic acid (PLA) scaffold. The surface of the PLA scaffold was modified by subjecting it to strong alkaline or organic solvent treatment to enhance GO doping for realizing effective adsorption of cationic dye solutions. When subjected to 95% acetone treatment, the structural properties of PLA changed, and particularly, two main hydrophilic functional groups (carboxylic acids and hydroxyls) were newly formed on the PLA through cleavage of the ester bond of the aliphatic polyester. Owing to these changes, the roughness of the PLA surface increased, and its tensile strength decreased. Meanwhile, its surface was doped mainly with GO, resulting in approximately 75% methylene blue (MB) adsorption on the 3D-printed GO-based PLA filter. Based on the established optimal pretreatment conditions, a kinetic MB sorption study and an isotherm study were conducted to evaluate the 3D-printed GO-based PLA filter. The pseudo-second-order model yielded the best fit, and the MB adsorption was better fitted to the Langmuir isotherm. These results suggested that chemical adsorption was the main driver of the reaction, and monolayer sorption occurred on the adsorbent surface. The results of this study highlight the importance of PLA surface modification in enhancing GO doping and achieving effective MB adsorption in aqueous solutions. Ultimately, this study highlights the potential of using 3D printing technology to fabricate the components required for implementing water treatment processes.

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Section: Resultsmentioning

confidence: 99%

Facile Surface Treatment of 3D-Printed PLA Filter for Enhanced Graphene Oxide Doping and Effective Removal of Cationic Dyes

Park

Lee

et al. 2023

Polymers

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“…The M/ COFs dispersion is then either dipped onto the 3D lattice [82,83] or the lattice is immersed in the M/COFs dispersion to produce the 3D-printed M/COF-covered monolith [84,85]. The adhesion between the M/COF and the skeleton is achieved by using the additives, such as Chitosan [84,86], and PVDF [82]. However, a major challenge is the potential weak adhesion between the M/COFs and the monolith, 1 3 which can lead to poor stability in applications.…”

Section: Advance In Covering Methodsmentioning

confidence: 99%

Challenges and Opportunities in Preserving Key Structural Features of 3D-Printed Metal/Covalent Organic Framework

Liu,

Zhao,

Wang

2024

Nano-Micro Lett.

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Metal–organic framework (MOF) and covalent organic framework (COF) are a huge group of advanced porous materials exhibiting attractive and tunable microstructural features, such as large surface area, tunable pore size, and functional surfaces, which have significant values in various application areas. The emerging 3D printing technology further provides MOF and COFs (M/COFs) with higher designability of their macrostructure and demonstrates large achievements in their performance by shaping them into advanced 3D monoliths. However, the currently available 3D printing M/COFs strategy faces a major challenge of severe destruction of M/COFs’ microstructural features, both during and after 3D printing. It is envisioned that preserving the microstructure of M/COFs in the 3D-printed monolith will bring a great improvement to the related applications. In this overview, the 3D-printed M/COFs are categorized into M/COF-mixed monoliths and M/COF-covered monoliths. Their differences in the properties, applications, and current research states are discussed. The up-to-date advancements in paste/scaffold composition and printing/covering methods to preserve the superior M/COF microstructure during 3D printing are further discussed for the two types of 3D-printed M/COF. Throughout the analysis of the current states of 3D-printed M/COFs, the expected future research direction to achieve a highly preserved microstructure in the 3D monolith is proposed.

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“…The growth of smectite layers on the surface of spherical silica micro-particles with subsequent grafting with octyl chains led to the formation of complex systems exhibiting the adsorption of anionic as well as cationic dyes, phloxine B and MB [202]. In recent years, the complexes of metal-organic frameworks with clay and clay minerals have been developed, exhibiting a superior ability to absorb organic dyes [203][204][205][206]. Such materials benefiting from the advantageous properties of both component types have not been studied extensively yet.…”

Section: Multicomponent Materials and Complex Systemsmentioning

confidence: 99%

Controversial Issues Related to Dye Adsorption on Clay Minerals: A Critical Review

Bujdák

2023

Molecules

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This critical review points out the most serious and problematic issues to be found in the literature on the adsorption of dyes on clay minerals. The introduction draws attention to the fundamental problems, namely the insufficient characterization of adsorbents, the influence of impurities on the adsorption of dyes, and the choice of inappropriate models for the description of the very complex systems that clay minerals and their systems represent. This paper discusses the main processes accompanying adsorption in colloidal systems of clay minerals. The relationship between the stability of the colloidal systems and the adsorption of dye molecules is analyzed. The usual methodological procedures for determining and evaluating the adsorption of dyes are critically reviewed. A brief overview and examples of modified clay minerals and complex systems for the adsorption of organic dyes are summarized. This review is a guide for avoiding some faults in characterizing the adsorption of organic dyes on clay minerals, to improve the procedure for determining adsorption, to evaluate results correctly, and to find an appropriate theoretical interpretation. The main message of this article is a critical analysis of the current state of the research in this field, but at the same time, it is a guide on how to avoid the most common problems and mistakes.

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A 3D-printed hierarchical porous architecture of MOF@clay composite for rapid and highly efficient dye scavenging

Abstract: Recently, 3D printing technology has attracted increasing attention for various applications such as wastewater treatment. Herein, we describe the fabrication of 3D-printed architecture of highly porous metal-organic framework (MOF) and...

Cited by 19 publications

References 48 publications

Facile Surface Treatment of 3D-Printed PLA Filter for Enhanced Graphene Oxide Doping and Effective Removal of Cationic Dyes

Facile Surface Treatment of 3D-Printed PLA Filter for Enhanced Graphene Oxide Doping and Effective Removal of Cationic Dyes

Challenges and Opportunities in Preserving Key Structural Features of 3D-Printed Metal/Covalent Organic Framework

Controversial Issues Related to Dye Adsorption on Clay Minerals: A Critical Review

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