A5068671232- Covalent Organic Framework Applications
- Metal-Organic Frameworks: Synthesis and Applications
- Advanced Photocatalysis Techniques
- Advanced battery technologies research
- Perovskite Materials and Applications
- Caching and Content Delivery
- Conducting polymers and applications
- Advanced Battery Materials and Technologies
- Chemical Synthesis and Reactions
- Supercapacitor Materials and Fabrication
- Carbon dioxide utilization in catalysis
- Luminescence and Fluorescent Materials
- Membrane Separation and Gas Transport
- Gas Sensing Nanomaterials and Sensors
- Carbon Dioxide Capture Technologies
- Machine Learning in Materials Science
Indian Institute of Science Education and Research Pune
2019-2024
Osaka University
2024
Abstract Redox‐active covalent organic frameworks (COFs) store charges but possess inadequate electronic conductivity. Their capacitive action works by storing H + ions in an acidic electrolyte and is typically confined to a small voltage window (0–1 V). Increasing this means higher energy power density, risks COF stability. Advantageously, COF's large pores allow the storage of polarizable bulky under wider thus reaching density. Here, COF–electrode–electrolyte system operating at high...
Abstract Aqueous rechargeable batteries are promising grid‐scale energy storage devices because of their affordability, operational safety, and environmental benignity. Among these, Zn‐ion (ZIBs) have unfolded new horizons. Designing superior cathodes for ZIBs is crucial. Covalent organic frameworks (COFs) can be made redox active with a high surface. Here, the first time, chelating COF redox‐active ZnI 2 in ZnSO 4 (aq) electrolyte combined. Including iodide harvests an approximately...
Abstract Capacitors are the most practical high‐storage and rapid charge‐release devices. The number of ions stored per unit area their interaction strength with electrode dictates capacitor‐performance. Microporous materials provide a high storage surface optimal interactions. Adsorbing electron‐rich easily polarizable molecules into microporous electrodes is expected to boost Faradaic pseudo‐activity. If such electrode–electrolyte interactions can be made as potential‐driven reversible...
Improving the electronic conductivity and structural robustness of covalent organic frameworks (COFs) is paramount. Here, we covalently cross-link a 2D COF with polypyrrole (Ppy) chains to form quasi-3D COF. The 3D shows well-defined reflections in SAED patterns distinctly indexed its modeled crystal structure. This knitting layers conjugated units improves from 10–9 10–2 S m–1. boost affirmed by presence density states near Fermi level COF, this elevates COF's valence band maximum 0.52 eV...
Covalent organic frameworks are a new class of crystalline polymers possessing high surface area and ordered pores. Judicious selection building blocks leads to strategic heteroatom inclusion into the COF structure. Owing their area, exceptional stability molecular tunability, COFs adopted for various potential applications. The heteroatoms lining in pores favor synergistic host-guest interaction enhance targeted property. In this report, we have synthesized resorcinol-phenylenediamine-based...
Developing stable active catalysts for reducing water-soluble pollutants is a desirable target. In this pursuit, we have functionalized covalent organic frameworks (COFs) with gold (Au) and cobalt (Co) nanoparticles via one-step aqueous synthesis process, their catalytic activity in methyl orange methylene blue examined. Operando absorbance measurements of (anionic dye) reduction revealed AuCoCOF (1.3 Au/1.0 Co) to superior kinetics over many other catalysts, which typically require...
Electrochemical deposition from an electrolyte containing Cu 2+ loads Cu(0) nanoparticles (3.34 wt%) into a COF, making them resemble single-site catalyst. This Cu@COF serves as excellent heterogeneous catalyst for multi-fold Ullmann coupling reactions.
Methane is an important alternative fuel, and upgrading it to improve fuel efficiency imperative target. Solid sorbents capable of selectively removing the major impurities CO2 N2 from natural gas contribute immensely this process. We report a porous 3D iron-MOF built by linking scarce Fe4O18N2 clusters through readily available terephthalate diaminotrizaole ligands. The 1-D channels with high density polarizing amine groups, aromatic rings, carboxylate oxygen adsorb even less polarizable...
CALF-20, a zinc-triazolato-oxalate MOF, [Zn2(tz)2(Ox)]·solvent, is an industrially practiced ultramicroporous MOF sorbent. In some interesting structural transformations occur during its humid CO2 capture. Even though structure simple, the design of superior sorbents based on still not straightforward. Hence, broader investigation these Zn-triazolato-oxalate frameworks with new outlook necessary. Herein, we report Zn-aminotriazolato-oxalate (IISERP-MOF35, [(CH3)2NH2]2[Zn5(Atz)4(Ox)4]·2H2O),...
Adaptable polymer-based solid-state electrolytes can be a game-changer toward safe, lightweight flexible batteries. We present robust Bakelite-type organic polymer covalently decked with viologen, triazine, and phenolic moieties. Its structure cationic viologen centers incorporates counter-balancing free hydroxide ions into the polymeric framework. By design, aromatic groups heteroatoms in framework activated under an applied potential to prompt push-pull drive, setting off towing of via...
A composite of catalytic Lewis acidic zirconium oxyhydroxides (8 wt %) and a covalent organic framework (COF) was synthesized. X-ray diffraction infrared (IR) spectroscopy reveal that COF's structure is preserved after loading with oxyhydroxides. Electron microscopy confirms homogeneous distribution nano- to sub-micron-sized clusters in the COF. 3D tomography captures micron-sized channels connecting well-dispersed on The crystalline ZrOx(OH)y@COF's nanostructure model-optimized via...
Quasi-solid-state rechargeable zinc-air batteries (ZABs) are suitable for the generation of portable clean energy due to their high and power density, safety, cost-effectiveness. Compared typical alkaline aqueous electrolyte in a ZAB, polymer or gel-based electrolytes can suppress dissolution zinc, preventing precipitation undesirable irreversible zinc compounds. Their low electronic conductivity minimizes dendrite formation. However, gel suffer from capacity fade loss volatile solvent,...
Covalent organic frameworks (COFs) represent bulk crystalline polymers characterized by their significant surface area and well-organized pores. By carefully selecting building blocks, we can tailor COF structures with strategically placed heteroatoms. This deliberate inclusion enhances stability, area, guest-binding ability, which make them highly versatile catalyst supports. Importantly, heteroatoms within pores under an applied potential amplify the catalyst's desired properties. FeOOH,...
A carboxylic acid functionalized sp 3 N-rich imine bonded COF shows a humidity-dependent visible color change. This is easily exfoliated to nanosheets, which are explored as potential humidity sensor that detects trace water in organic solvents.