Covalently functionalized polyacrylonitrile fibers for heterogeneous catalysis and pollutant adsorption: a review

Zhao, Lingxue; Ma, Ning; Tao, Minli; Zhang, W.Q.

doi:10.1016/j.mtchem.2022.101206

Cited by 5 publications

(2 citation statements)

References 139 publications

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“…Polyacrylonitrile fiber (PANF) is widely used in the textile industry, architecture, and people's daily lives. Furthermore, PANF is rich in cyano and ester groups, which can be easily converted into various functional groups [30]. Our previous work successfully constructed different functionalized PANFs for organic catalysis [31,32], heavy metal removal [33,34] and phosphate purification [35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of FeOOH-Loaded Aminated Polyacrylonitrile Fiber for Simultaneous Removal of Phenylphosphonic Acid and Phosphate from Aqueous Solution

Rui

Liu

et al. 2023

Polymers

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Phosphorus is one of the important metabolic elements for living organisms, but excess phosphorus in water can lead to eutrophication. At present, the removal of phosphorus in water bodies mainly focuses on inorganic phosphorus, while there is still a lack of research on the removal of organic phosphorus (OP). Therefore, the degradation of OP and synchronous recovery of the produced inorganic phosphorus has important significance for the reuse of OP resources and the prevention of water eutrophication. Herein, a novel FeOOH-loaded aminated polyacrylonitrile fiber (PANAF-FeOOH) was constructed to enhance the removal of OP and phosphate. Taking phenylphosphonic acid (PPOA) as an example, the results indicated that modification of the aminated fiber was beneficial to FeOOH fixation, and the PANAF-FeOOH prepared with 0.3 mol L−1 Fe(OH)3 colloid had the best performance for OP degradation. The PANAF-FeOOH efficiently activated peroxydisulfate (PDS) for the degradation of PPOA with a removal efficiency of 99%. Moreover, the PANAF-FeOOH maintained high removal capacity for OP over five cycles as well as strong anti-interference in a coexisting ion system. In addition, the removal mechanism of PPOA by the PANAF-FeOOH was mainly attributed to the enrichment effect of PPOA adsorption on the fiber surface’s special microenvironment, which was more conducive to contact with SO4•− and •OH generated by PDS activation. Furthermore, the PANAF-FeOOH prepared with 0.2 mol L−1 Fe(OH)3 colloid possessed excellent phosphate removal capacity with a maximal adsorption quantity of 9.92 mg P g−1. The adsorption kinetics and isotherms of the PANAF-FeOOH for phosphate were best depicted by pseudo-quadratic kinetics and a Langmuir isotherm model, showing a monolayer chemisorption procedure. Additionally, the phosphate removal mechanism was mainly due to the strong binding force of iron and the electrostatic force of protonated amine on the PANAF-FeOOH. In conclusion, this study provides evidence for PANAF-FeOOH as a potential material for the degradation of OP and simultaneous recovery of phosphate.

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Section: Introductionmentioning

confidence: 99%

Synthesis of FeOOH-Loaded Aminated Polyacrylonitrile Fiber for Simultaneous Removal of Phenylphosphonic Acid and Phosphate from Aqueous Solution

Rui

Liu

et al. 2023

Polymers

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“…When diamines were used as the nucleophilic agents, various amino groups were introduced onto the polyacrylonitrile chain, which resulted in high-density and deep-level modification of the PANF surface. The so-obtained amine-functionalized PANFs have demonstrated diverse catalytic usage in various C–C bond-formation reactions. − Therefore, the idea emerges that acid groups may be introduced onto partial amino N atoms of the amine-immobilized PANF, which employs these N atoms as anchoring points of acid groups through the formation of the amide bond and converts them as anchoring points of acid groups. To achieve this fabrication, boronic acid was selected as the acid partner.…”

Section: Introductionmentioning

confidence: 99%

Cooperative Catalysis by Boronic Acid-Amine Bifunctionalized Polyacrylonitrile Fibers in Henry Reaction

Zhang

et al. 2023

ACS Catal.

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The acid–base pairing and fabrication method was herein employed to construct acid–base bifunctional heterogeneous catalysts. The boronic acid group was introduced into primary amine-functionalized polyacrylonitrile fiber (PANEAF) via amide bond formation to fabricate boronic acid-amine bifunctional PANFs as recyclable heterogeneous catalysts by using the amino N atoms of PANEAF as anchoring points. The so-obtained fiber catalysts PANEA–BA1F and PANEA–BA2F containing boronic acid groups attached on benzene and pyridine rings, respectively, were employed in the Henry reactions of aryl aldehydes with nitromethane. Catalytic investigations showed that their performance had great correlation with the change of boronic acid. PANEA–BA2F exhibited a higher substrate selectivity than PANEA–BA1F, and only the benzaldehydes with hydroxy, dimethylamino, and amide groups were reactive, which showed preliminary substrate specificity like enzyme catalysis. The in situ investigation with cyclododecane as solvent by Raman and Fourier transform infrared spectroscopy (FT-IR) analysis was conducted to clarify the catalytic difference. Moreover, the uncommon reverse reactivity order of benzaldehydes in PANEA–BA1F-catalyzed condensation was explained.

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Highly active iron oxide@N catalyst derived from the iron acetate/polyacrylonitrile threads: Driving nitroarene conversion to value‐added amines

Rubab,

Sharif,

Razzaq

et al. 2024

J of Applied Polymer Sci

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Chemoselective reduction of nitroarenes to corresponding arylamines is a significant reaction in the chemical industry. However, in the presence of other reducible groups, including halogenated nitrobenzene, nitrobiphenyl, and nitroquinoline in the same molecule of nitroaromatics, the control of chemoselectivity remains challenging. Here, a facile fabrication of a heterogeneous iron‐based catalyst is reported as a potential alternative to precious metal catalysts for the chemoselective reduction of nitroarenes. The pyrolysis of iron acetate/polyacrylonitrile (PAN) template under an inert atmosphere furnishes active Fe3O4 nanoparticles (NPs) encapsulated in nitrogen‐doped (N‐doped) carbon layers, which can provide more catalytic active sites (Fe3O4/PAN@800). Notably, non‐precious iron oxide NPs supported on N‐doped carbon support prevent aggregation, thereby enhancing the catalytic activity. The sustainable and reusable Fe3O4/PAN@800 catalyst, having only 0.8% metal content as demonstrated by x‐ray photoelectron spectroscopy, delivers excellent yields of corresponding amines from differently functionalized nitroarenes. Hydrogenation of a series of structurally functionalized nitroarenes produced excellent yields of anilines, which serve as building blocks and intermediates for fine and bulk chemicals. Hydrogenation of 2‐chloro‐3‐nitropyridine, 2‐nitro‐1,1′‐biphenyl, ortho‐nitroaniline, and 4‐aminophenyl acrylonitrile yielded respective anilines up to 99%. The active sites of Fe3O4 have magnetic performance, hence, the catalyst can be easily recovered using a magnet and reused for at least five cycles without significant loss of catalytic activity. Therefore, the easily prepared, cost‐effective, and reusable Fe3O4/PAN@800 catalyst presented in this study shows potential for applications in the selective reduction of aromatic nitro compounds. Consequently, this study potentially establishes a guideline for the facile preparation of abundant transition‐non‐noble metal‐based reusable supported catalysts for various applications in the chemical industry.

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Covalently functionalized polyacrylonitrile fibers for heterogeneous catalysis and pollutant adsorption: a review

Cited by 5 publications

References 139 publications

Synthesis of FeOOH-Loaded Aminated Polyacrylonitrile Fiber for Simultaneous Removal of Phenylphosphonic Acid and Phosphate from Aqueous Solution

Synthesis of FeOOH-Loaded Aminated Polyacrylonitrile Fiber for Simultaneous Removal of Phenylphosphonic Acid and Phosphate from Aqueous Solution

Cooperative Catalysis by Boronic Acid-Amine Bifunctionalized Polyacrylonitrile Fibers in Henry Reaction

Highly active iron oxide@N catalyst derived from the iron acetate/polyacrylonitrile threads: Driving nitroarene conversion to value‐added amines

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