Three novel triazine-based materials with different O/S/N set of donor atoms: One-step preparation and comparison of their capability in selective separation of uranium

Bai, Chiyao; Zhang, Meicheng; Li, Bo; Yin, Tian; Zhang, Shuang; Zhao, Xinqing; Li, Yang; Wang, Lei; Ma, Lijian; Li, Shoujian

doi:10.1016/j.jhazmat.2015.07.020

Cited by 57 publications

(18 citation statements)

References 67 publications

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“…Scheme 1 shows the synthetic procedure for the triazine-based porous organic polymers, and the nucleophilic substitution reaction was performed between CC and different organic amines. 28 In a typical process, the aminating agent (45 mmol) was dissolved in THF (50 mL), adding NaOH as acidbinding agent (90 mmol) into the solution under N 2 protection. CC (30 mmol) was also dissolved in THF (100 mL), and they were dropwise added into the flask under vigorously stirring.…”

Section: Methodsmentioning

confidence: 99%

Synthesis of Triazine-Based Porous Organic Polymers Derived N-Enriched Porous Carbons for CO₂ Capture

Shao

Huang

et al. 2018

Ind. Eng. Chem. Res.

114

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Porous carbon with both high CO 2 uptake and CO 2 /N 2 selectivity is desired for reducing the cost of carbon capture. Here, we report the preparation of N-enriched porous carbons (NPCs) derived from the low-cost triazine-based porous organic polymers using KOH as the activating agent under N 2 . The results indicate that the nitrogen content and textural properties of the NPCs can be effectively adjusted by the polymer precursors and the carbonization temperature. Impressively, the NPCs have an enriched N content (5.56−11.33 wt %) and abundant porosity (BET surface area: 394−1873 m 2 /g, pore volume: 0.27−1.56 cm 3 /g), endowing them with high CO 2 uptake (120− 207 mg/g at 273 K and 1.0 bar) and acceptable CO 2 /N 2 selectivity (Henry's law: 14.3−16.8). In particular, the ultra micropore volume (d ≤ 0.8 nm) is proven a key factor for the CO 2 uptake, while both the ultra micropore volume and N content contribute the CO 2 /N 2 selectivity. Our described work will provide a strategy to initiate developments of rationally designed porous carbons for various potential applications.

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Section: Methodsmentioning

confidence: 99%

Synthesis of Triazine-Based Porous Organic Polymers Derived N-Enriched Porous Carbons for CO₂ Capture

Shao

Huang

et al. 2018

Ind. Eng. Chem. Res.

114

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“…Unfortunately, the interactions between solid‐phase extractants (such as, hydrothermal carbon, porous organic polymers, metal‐organic frameworks (MOFs), porous silica, graphene) and metal ions reported so far are mostly chemical adsorption (coordination/complexation by functional groups) and physical adsorption (trapping via pores/channels, or van der Waals adsorption) or both . Chemical adsorption is mainly based on coordination interaction between electron‐rich (donor) atoms, such as O/N/S, and electron‐deficient metal cations, but at higher acidity (usually pH<2), the separation effect will be lost due to the protonation of ligands . Meanwhile, the selectivity of adsorbing materials to the target nuclide ion is also easily affected by the charge of the target ion and the competition of coexisting metal ions.…”

Section: Introductionmentioning

confidence: 99%

Redox‐Active Two‐Dimensional Covalent Organic Frameworks (COFs) for Selective Reductive Separation of Valence‐Variable, Redox‐Sensitive and Long‐Lived Radionuclides

Guo

et al. 2020

Angew Chem Int Ed

Self Cite

149

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We report the first example of 2D covalent organic framework nanosheets (Redox‐COF1) for the selective reduction and in situ loading of valence‐variable, redox‐sensitive and long‐lived radionuclides (abbreviated as VRL nuclides). Compared with sorbents based on chemical adsorption and physical adsorption, the redox adsorption mechanism of Redox‐COF1 can effectively reduce the impact of functional group protonation under the usual high‐acidity conditions in chemisorption, and raise the adsorption efficiency from the monotonous capture by pores in physisorption. The adsorption selectivity for UO22+ reaches up to unprecedented ca. 97 % at pH 3, more than for any analogous adsorbing material.

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“…33,34 In this manner, sole surface adsorption of the acid groups can be suppressed, while covalent bonding becomes favoured. First attempts to implement sulfuric species within CTF materials were described by Bai et al 35 Utilizing thiourea and thiosemicarbazide during a polymerization step with cyanuric chloride resulted in sulfur containing CTF materials with high sorption capacities and selectivities for uranium(VI). More recently, Talapaneni et al substituted ZnCl 2 by elemental polymeric sulfur to enable a solvent and catalyst-free polymerization of 1,4-dicyanobenzene to the corresponding CTF.…”

Section: -32mentioning

confidence: 99%

Sulfonated covalent triazine-based frameworks as catalysts for the hydrolysis of cellobiose to glucose

et al. 2018

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Covalent triazine-based frameworks (CTFs) were synthesized in large scale from various monomers. The materials were post-synthetically modified with acid functionalities via gas-phase sulfonation. Acid capacities of up to 0.83 mmol g À1 at sulfonation degrees of up to 10.7 mol% were achieved. SulfonatedCTFs exhibit high specific surface area and porosity as well as excellent thermal stability under aerobic conditions (>300 C). Successful functionalization was verified investigating catalytic activity in the acidcatalyzed hydrolysis of cellobiose to glucose at 150 C in H 2 O. Catalytic activity is mostly affected by porosity, indicating that mesoporosity is beneficial for hydrolysis of cellobiose. Like other sulfonated materials, S-CTFs show low stability under hydrothermal reaction conditions. Recycling of the catalyst is challenging and significant amounts of sulfur leached out of the materials. Nevertheless, gas-phase sulfonation opens a path to tailored solid acids for application in various reactions. S-CTFs form the basis for multi-functional catalysts, containing basic coordination sites for metal catalysts, tunable structural parameters and surface acidity within one sole system.

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Three novel triazine-based materials with different O/S/N set of donor atoms: One-step preparation and comparison of their capability in selective separation of uranium

Cited by 57 publications

References 67 publications

Synthesis of Triazine-Based Porous Organic Polymers Derived N-Enriched Porous Carbons for CO₂ Capture

Synthesis of Triazine-Based Porous Organic Polymers Derived N-Enriched Porous Carbons for CO₂ Capture

Redox‐Active Two‐Dimensional Covalent Organic Frameworks (COFs) for Selective Reductive Separation of Valence‐Variable, Redox‐Sensitive and Long‐Lived Radionuclides

Sulfonated covalent triazine-based frameworks as catalysts for the hydrolysis of cellobiose to glucose

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Three novel triazine-based materials with different O/S/N set of donor atoms: One-step preparation and comparison of their capability in selective separation of uranium

Cited by 57 publications

References 67 publications

Synthesis of Triazine-Based Porous Organic Polymers Derived N-Enriched Porous Carbons for CO2 Capture

Synthesis of Triazine-Based Porous Organic Polymers Derived N-Enriched Porous Carbons for CO2 Capture

Redox‐Active Two‐Dimensional Covalent Organic Frameworks (COFs) for Selective Reductive Separation of Valence‐Variable, Redox‐Sensitive and Long‐Lived Radionuclides

Sulfonated covalent triazine-based frameworks as catalysts for the hydrolysis of cellobiose to glucose

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Product

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About

Synthesis of Triazine-Based Porous Organic Polymers Derived N-Enriched Porous Carbons for CO₂ Capture

Synthesis of Triazine-Based Porous Organic Polymers Derived N-Enriched Porous Carbons for CO₂ Capture