Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 160096 - 160096
Опубликована: Янв. 1, 2025
Язык: Английский
Nature Communications, Год журнала: 2024, Номер 15(1)
Опубликована: Март 26, 2024
Abstract Radioiodine capture from nuclear fuel waste and contaminated water sources is of enormous environmental importance, but remains technically challenging. Herein, we demonstrate robust covalent organic frameworks (COFs) with antiparallel stacked structures, excellent radiation resistance, high binding affinities toward I 2 , CH 3 I, − under various conditions. A neutral framework (ACOF-1) achieves a affinity through the cooperative functions pyridine-N hydrazine groups stacking layers, resulting in capacity ~2.16 g/g for ~0.74 at 25 °C dynamic adsorption Subsequently, post-synthetic methylation ACOF-1 converted sites to cationic pyridinium moieties, yielding (namely ACOF-1R) enhanced triiodide ion water. ACOF-1R can rapidly decontaminate iodine polluted groundwater drinking levels uptake ~4.46 established column breakthrough tests. The specific moieties make promising adsorbents radioiodine pollutants treatment practical
Язык: Английский
Процитировано
57
Nature Communications, Год журнала: 2024, Номер 15(1)
Опубликована: Март 22, 2024
Abstract Two-dimensional (2D) covalent organic frameworks (COFs) and their derivatives have been widely applied as electrocatalysts owing to unique nanoscale pore configurations, stable periodic structures, abundant coordination sites high surface area. This work aims construct a non-thermodynamically Pt-N 2 active site by electrochemically modifying platinum (Pt) single atoms into fully conjugated 2D COF conductive agent-free pyrolysis-free electrocatalyst for the hydrogen evolution reaction (HER). In addition maximizing atomic utilization, single-atom catalysts with definite structures can be used investigate catalytic mechanisms structure-activity relationships. this work, in-situ characterizations theoretical calculations reveal that nitrogen-rich graphene analogue not only exhibits favorable metal-support effect Pt, adjusting binding energy between Pt H* intermediates forming instead of typical 4 environment, but also enhances electron transport ability structural stability, showing both conductivity stability in acidic environments.
Язык: Английский
Процитировано
42
Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(22)
Опубликована: Апрель 2, 2024
The ion extraction and electro/photo catalysis are promising methods to address environmental energy issues. Covalent organic frameworks (COFs) a class of template construct absorbents catalysts because their stable frameworks, high surface areas, controllable pore environments, well-defined catalytic sites. Among them, ionic COFs as unique crystalline porous materials, with charges in the or along walls, have shown different properties resulting performance these applications those from charge-neutral COFs. In this review, current research progress based on for conversion, including cationic/anionic materials is reviewed terms synthesis strategy, modification methods, mechanisms adsorption catalysis, well applications. Finally, we demonstrated challenges future development design strategies
Язык: Английский
Процитировано
31
Coordination Chemistry Reviews, Год журнала: 2024, Номер 504, С. 215659 - 215659
Опубликована: Янв. 16, 2024
Язык: Английский
Процитировано
30
Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(26)
Опубликована: Апрель 20, 2024
Inspired by dative boron-nitrogen (B←N) bonds proven to be the promising dynamic linkage for construction of crystalline covalent organic polymers/frameworks (COPs/COFs), we employed 1,4-bis(benzodioxaborole) benzene (BACT) and N,N'-Di(4-pyridyl)-1,4,5,8-naphthalenetetracarboxdiimide (DPNTCDI) as corresponding building blocks construct a functional COP (named CityU-25), which had been an anode in rechargeable lithium ion batteries. CityU-25 displayed excellent reversible storage capability 455 mAh/g after 170 cycles at 0.1 A/g, impressive one 673 720 0.5 A/g. These findings suggest that is standout candidate advanced battery technologies, highlighting potential application this type materials.
Язык: Английский
Процитировано
22
Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(31)
Опубликована: Май 14, 2024
Hydrazone-linked covalent organic frameworks (COFs) with structural flexibility, heteroatomic sites, post-modification ability and high hydrolytic stability have attracted great attention from scientific community. COFs, as a subclass of Schiff-base was firstly reported in 2011 by Yaghi's group later witnessed prosperous development various aspects. Their adjustable structures, precise pore channels plentiful sites hydrazone-linked structures possess much potential diverse applications, for example, adsorption/separation, chemical sensing, catalysis energy storage, etc. Up to date, the systematic reviews about COFs are still rare. Therefore, this review, we will summarize their preparation methods, characteristics related discuss opportunity or challenge COFs. We hope review could provide new insights exploring more appealing functions applications.
Язык: Английский
Процитировано
20
Chemical Engineering Journal, Год журнала: 2024, Номер 485, С. 149135 - 149135
Опубликована: Фев. 5, 2024
Язык: Английский
Процитировано
19
Nature Communications, Год журнала: 2024, Номер 15(1)
Опубликована: Май 8, 2024
Abstract As one of the most attractive methods for synthesis ordered hierarchically porous crystalline materials, soft-template method has not appeared in covalent organic frameworks (COFs) due to incompatibility surfactant self-assembly and guided crystallization process COF precursors phase. Herein, we connect soft templates backbone through ionic bonds, avoiding their incompatibilities, thus introducing an additional arrangement into anionic microporous COFs. The ion exchange is used remove while maintaining high crystallinity COFs, resulting construction COFs with micropores/mesopores, herein named OHMMCOFs (OHMMCOF-1 OHMMCOF-2). exhibit significantly enhanced functional group accessibility faster mass transfer rate. extrinsic porosity can be adjusted by changing template length, concentration, ratio. Cationic guanidine-based (OHMMCOF-3) are also constructed using same method, which verifies scalability strategy. This work provides a path constructing tunable greatly improved efficiency accessibility.
Язык: Английский
Процитировано
19
Angewandte Chemie, Год журнала: 2024, Номер 136(22)
Опубликована: Апрель 2, 2024
Abstract The ion extraction and electro/photo catalysis are promising methods to address environmental energy issues. Covalent organic frameworks (COFs) a class of template construct absorbents catalysts because their stable frameworks, high surface areas, controllable pore environments, well‐defined catalytic sites. Among them, ionic COFs as unique crystalline porous materials, with charges in the or along walls, have shown different properties resulting performance these applications those from charge‐neutral COFs. In this review, current research progress based on for conversion, including cationic/anionic materials is reviewed terms synthesis strategy, modification methods, mechanisms adsorption catalysis, well applications. Finally, we demonstrated challenges future development design strategies
Язык: Английский
Процитировано
18
Materials Today Sustainability, Год журнала: 2024, Номер 25, С. 100703 - 100703
Опубликована: Фев. 8, 2024
Язык: Английский
Процитировано
16