Synthesis of size-controllable urchin-like covalent organic frameworks for adsorption of nitrophenols

Wen, Qiu-Lin; She, Wen-Zhi; Liu, Jin-Zhou; Zhang, Hai-Chi; Li, Rong Sheng; Ling, Jian; Cao, Qiue

doi:10.1016/j.micromeso.2023.112624

Cited by 7 publications

(3 citation statements)

References 45 publications

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“…Adsorption isotherms can not only predict the maximum adsorption capacity but also understand how the interaction between adsorbent and adsorbate occurs . We used the Langmuir, Freundlich, and Sips models to evaluate the equilibrium data (Figure B and Table S3). Based on the data in Table S3, the Langmuir isotherm model is more consistent with the adsorption equilibrium data, indicating that I 2 is more on the surface of TTA-DMTP-COF monolayer adsorption .…”

Section: Resultsmentioning

confidence: 99%

Nanoporous N-Rich Covalent Organic Frameworks with High Specific Surface Area for Efficient Adsorption of Iodine and Methyl Iodide

She,

Wen,

Zhang

et al. 2023

ACS Appl. Nano Mater.

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With the rapid development of the nuclear industry, the effective treatment of radioactive iodine has become an urgent and challenging task. In this article, we synthesized a nanoporous nitrogen-rich covalent organic framework (TTA-DMTP-COF) with a specific surface area of up to 2332 m2/g for the adsorption of iodine (I2) and methyl iodide (CH3I). Adsorption experiments showed that TTA-DMTP-COF exhibited effective I2 and CH3I adsorption properties; the maximum adsorption capacity of I2 is as high as 2.59 g·g–1, and the maximum adsorption capacity of CH3I is 1.60 g·g–1. In addition, TTA-DMTP-COF can effectively adsorb iodine from an iodine–cyclohexane solution, and the adsorption amount is as high as 516.46 mg/g. Mechanistic studies have shown that I2 and CH3I enter the nanopores of COF materials and form charge transfer complexes with various functional groups in TTA-DMTP-COF (including imines, triazine moieties, and residual amino groups). The N-methylation reaction specifically binds CH3I to the nucleophilic N site and generates polyiodides during the adsorption process. Our work demonstrates that TTA-DMTP-COF is an excellent candidate material capable of capturing radioactive iodine from air and solution in harsh environments.

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Section: Resultsmentioning

confidence: 99%

Nanoporous N-Rich Covalent Organic Frameworks with High Specific Surface Area for Efficient Adsorption of Iodine and Methyl Iodide

She,

Wen,

Zhang

et al. 2023

ACS Appl. Nano Mater.

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“…Therefore, to reduce the risk of possible health problems, the United States has listed p -nitrophenol (PNP), DNP, and other nitrophenols as priority pollutants. − A series of related researches have determined that the most effective strategy for treating nitrophenols is adsorption using porous materials, which does not produce any additional toxic metabolites. To date, many fascinating materials have been utilized for nitrophenol removal, such as activated carbons, , zeolites, , graphene oxides, , ionic liquids, , metal–organic frameworks, , and covalent organic frameworks. , However, carbon-based materials rely on a single interaction force and have poor structural regulation. Metal coordination bond-based organic skeleton materials have poor moisture resistance.…”

Section: Introductionmentioning

confidence: 99%

“…To date, many fascinating materials have been utilized for nitrophenol removal, such as activated carbons, 7,8 zeolites, 9,10 graphene oxides, 11,12 ionic liquids, 13,14 metal−organic frameworks, 15,16 and covalent organic frameworks. 17,18 However, carbon-based materials rely on a single interaction force and have poor structural regulation. Metal coordination bondbased organic skeleton materials have poor moisture resistance.…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of a Magnetic Glucose-Based Hyper-Cross-Linked Polymer by Dual-Role Ferric Chloride for Nitrophenol Removal from Sewage

Gao,

Wang,

et al. 2023

ACS EST Water

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Dual-purpose ferric chloride was successively used as a catalyst and iron source for ferric oxide to conveniently prepare a magnetic Fe3O4/HCPBn‑glu polymer with tetrabenzylglucose as the precursor. First, ferric chloride was employed as a Friedel–Crafts reaction catalyst for the synthesis of hyper-cross-linked HCPBn‑glu. Subsequently, the ferric chloride was utilized as an iron source for the synthesis of Fe3O4 magnetic nanoparticles by coprecipitation, which anchored Fe3O4 nanoparticles onto the HCPBn‑glu skeleton. A variety of modern analytical techniques were used to characterize prepared Fe3O4/HCPBn‑glu. The effects of adsorbent amount, contact time, and pH were studied, and this composite showed excellent adsorption performance for 2,4-dinitrophenol (DNP), with a maximum adsorption capacity of 83.3 mg/g and removal efficiency of 91.7%. The adsorption of DNP is well fitted by the Freundlich model, indicating multilayer adsorption. The adsorption kinetics obey a pseudo-second-order kinetic model. In addition, Fe3O4/HCPBn‑glu can be reused for at least six cycles with an acceptable removal efficiency, making it an economically valuable adsorbent. The adsorption mechanism was also discussed, and hydrogen bond, hydrophobic, and π–π interactions may be responsible for DNP adsorption. Based on these results, Fe3O4/HCPBn‑glu can be utilized as an effective adsorbent for the removal of nitrophenols from sewage.

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Preparation and characterization of pyrimidine‐cored covalent organic frameworks for heavy metal removal

Wang,

Ma,

Wang

et al. 2024

Journal of Polymer Science

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In this work, two novel pyrimidine‐cored covalent organic frameworks TpTap‐COF and TpTan‐COF were synthesized for the first time and used for the adsorption of heavy metal ions in aqueous solution. Both COFs are nanofiber clusters with preferable crystallinity and thermal stability. The impact parameters such as pH value, shaking time, initial concentration, and temperature were studied by batch adsorption experiments in the multi‐metal ions system. The adsorption of six metal ions onto COFs follows the pseudo‐second‐order kinetic model and the Freundlich isotherm model, which is a chemical adsorption process that occurs on non‐uniform surfaces. The adsorption rate is determined by both film diffusion and intraparticle diffusion. Further research on the adsorption of copper ions onto COFs indicates the formation of metal complexes between O#N#N/O#O chelating sites in the COF skeleton and Cu ions through the sharing of lone pair electrons.

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Synthesis of size-controllable urchin-like covalent organic frameworks for adsorption of nitrophenols

Cited by 7 publications

References 45 publications

Nanoporous N-Rich Covalent Organic Frameworks with High Specific Surface Area for Efficient Adsorption of Iodine and Methyl Iodide

Nanoporous N-Rich Covalent Organic Frameworks with High Specific Surface Area for Efficient Adsorption of Iodine and Methyl Iodide

Facile Synthesis of a Magnetic Glucose-Based Hyper-Cross-Linked Polymer by Dual-Role Ferric Chloride for Nitrophenol Removal from Sewage

Preparation and characterization of pyrimidine‐cored covalent organic frameworks for heavy metal removal

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