Metal-organic frameworks for wastewater treatment: Recent developments, challenges, and future prospects

Perera, A.A.P.R.; Madhushani, K.A.U.; Kumar, Anuj; Gupta, Ram K.

doi:10.1016/j.chemosphere.2023.139713

Cited by 16 publications

(3 citation statements)

References 125 publications

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“…Several adsorbents—such as covalent organic frameworks (COFs) and metal-organic frameworks (MOFs) [ 18 , 19 , 20 , 21 ], graphene nanosheets, CNTs, and activated carbon (AC)—have been widely used in the treatment of dye wastewater. More et al [ 22 ] used a chemical reduction method to fabricate Co 3 O 4 –MWCNT composites with a nanowire-like appearance and various pore diameters.…”

Section: Introductionmentioning

confidence: 99%

Efficient Removal of Hazardous P-Nitroaniline from Wastewater by Using Surface-Activated and Modified Multiwalled Carbon Nanotubes with Mesostructure

Liou,

Huang

2024

Toxics

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P-nitroaniline (PNA) is an aniline compound with high toxicity and can cause serious harm to aquatic animals and plants. Multiwalled carbon nanotubes (MWCNTs) are a multifunctional carbon-based material that can be applied in energy storage and biochemistry applications and semiconductors as well as for various environmental purposes. In the present study, MWCNTs (CO2–MWCNTs and KOH–MWCNTs) were obtained through CO2 and KOH activation. ACID–MWCNTs were obtained through surface treatment with an H2SO4–HNO3 mixture. Herein, we report, for the first time, the various MWCNTs that were employed as nanoadsorbents to remove PNA from aqueous solution. The MWCNTs had nanowire-like features and different tube lengths. The nanotubular structures were not destroyed after being activated. The KOH–MWCNTs, CO2–MWCNTs, and ACID–MWCNTs had surface areas of 487, 484, and 80 m2/g, respectively, and pore volumes of 1.432, 1.321, and 0.871 cm3/g, respectively. The activated MWCNTs contained C–O functional groups, which facilitate PNA adsorption. To determine the maximum adsorption capacity of the MWCNTs, the influences of several adsorption factors—contact time, solution pH, stirring speed, and amount of adsorbent—on PNA adsorption were investigated. The KOH–MWCNTs had the highest adsorption capacity, followed by the CO2–MWCNTs, pristine MWCNTs, and ACID–MWCNTs. The KOH–MWCNTs exhibited rapid PNA adsorption (>85% within the first 5 min) and high adsorption capacity (171.3 mg/g). Adsorption isotherms and kinetics models were employed to investigate the adsorption mechanism. The results of reutilization experiments revealed that the MWCNTs retained high adsorption capacity after five cycles. The surface-activated and modified MWCNTs synthesized in this study can effectively remove hazardous pollutants from wastewater and may have additional uses.

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Section: Introductionmentioning

confidence: 99%

Efficient Removal of Hazardous P-Nitroaniline from Wastewater by Using Surface-Activated and Modified Multiwalled Carbon Nanotubes with Mesostructure

Liou,

Huang

2024

Toxics

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“…MOFs are also known as porous coordination polymers (PCPs) due to their large surface area, high porosity, controllable pore sizes, and abundant adsorption sites, which make them potential materials for applications such as wastewater treatment involving the elimination of toxic metallic contaminants and organic contaminants [ 12 , 18 , 19 , 20 , 21 ]. Their modular structures can be used as adsorbents that interact with the adsorbate through interactions such as hydrogen bonding, π–π, acid–base interaction (ABI), coordination (Lewis ABI), and hydrophobic interaction [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

“…Their modular structures can be used as adsorbents that interact with the adsorbate through interactions such as hydrogen bonding, π–π, acid–base interaction (ABI), coordination (Lewis ABI), and hydrophobic interaction [ 22 ]. They can also function as additives in semipermeable membranes for water recovery [ 18 , 23 , 24 , 25 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

Novel Hydrophobic Functionalized UiO-66 Series: Synthesis, Characterization, and Evaluation of Their Structural and Physical–Chemical Properties

Narea,

Brito,

Quintero

et al. 2023

IJMS

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A novel set of four functionalized hydrophobic UiO-66-NHR series were synthesized through postsynthetic procedures, utilizing various benzoyl chlorides and UiO-66-NH2 as starting materials. This synthesis method was carried out by employing p- (1) and o-toluoyl (2), as well as 2- (3) and 4-fluorobenzoyl (4) substituents. The analysis of the resulting compounds was performed using conventional spectroscopic methods such as FT-IR and 1H NMR to quantify the conversion rate into amide. Furthermore, SEM and XPS techniques were employed for morphological and surface analysis. Finally, the evaluation of the chemical stability and contact angle using the sessile drop method was performed to evaluate the technological potential of these compounds for application in aqueous and acidic media (such as selective separation of different metals and wastewater recovery).

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High‐performance supercapacitors using nanostructured polyaniline‐based carbon: Effect of electrolytes

Madhushani,

Perera,

Lin

et al. 2024

Energy Storage

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Developing high‐performance materials for electrochemical energy storage devices such as batteries, and supercapacitors is a significant topic in material chemistry‐based research. The high consumption and limited availability of numerous materials used in energy devices lead to the development of alternative, effective, and cost‐effective materials exhibiting superior electrochemical chemical performance. A porous activated carbon, derived from polyaniline (PANI) synthesized through chemical oxidative polymerization, can be considered a viable solution in this context. In this study, the electrochemical window of the nitrogen‐doped porous activated carbon was enhanced through a combined synthesis process involving the carbonization and activation of PANI nanotubes with KOH. Moreover, alternations in surface area and porosity were evaluated using BET analysis for the samples having PANI to KOH ratios 1:0.5, 1:1, and 1:2. The results revealed a significant improvement in surface area and pore volume, increasing from 18 to 3535 m2/g from pure PANI to chemically treated samples. Among those materials, the PANI to KOH ratio of 1:1 exhibited the highest surface area of 3535 m2/g and the highest pore volume of 0.7131 cm3/g. Subsequently, the electrochemical performance of all materials was evaluated using a three‐electrode cell system and a symmetrical coin‐cell device. Electrodes fabricated with PANI to KOH ratio of 1:1 by weight showed better electrochemical performance in an aqueous electrolyte (6 M KOH) in both systems. This material exhibited the highest capacitance of 378 F/g (at 0.5 A/g) in the three‐electrode system and 143 F/g (at 0.5 A/g) in the SCCD. The SCCD achieved a maximum energy density of 23 Wh/kg with a power density of 544 W/kg. Additionally, these supercapacitors provided a good Coulombic efficiency of about 99% with capacitance retention of 97% at 7 A/g current density after 10 000 charge–discharge cycles. Further, this study expanded by investigating variations of electrochemical performance across various electrolytes, including aqueous, organic, and ionic liquids in coin‐cell supercapacitors. The findings reveal promising results, suggesting potential commercial applications for this facile approach to synthesize nitrogen‐doped activated carbon, especially for supercapacitors with aqueous electrolytes.

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Metal-organic frameworks for wastewater treatment: Recent developments, challenges, and future prospects

Cited by 16 publications

References 125 publications

Efficient Removal of Hazardous P-Nitroaniline from Wastewater by Using Surface-Activated and Modified Multiwalled Carbon Nanotubes with Mesostructure

Efficient Removal of Hazardous P-Nitroaniline from Wastewater by Using Surface-Activated and Modified Multiwalled Carbon Nanotubes with Mesostructure

Novel Hydrophobic Functionalized UiO-66 Series: Synthesis, Characterization, and Evaluation of Their Structural and Physical–Chemical Properties

High‐performance supercapacitors using nanostructured polyaniline‐based carbon: Effect of electrolytes

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