Tunable Hierarchically Structured Meso-Macroporous Carbon Spheres from a Solvent-Mediated Polymerization-Induced Self-Assembly

Abstract

Herein, we report a versatile solvent-mediated polymerization-induced self-assembly (PISA) strategy to directly synthesize highly N-doped hierarchically porous structured carbon spheres with a tunable meso-macroporous configuration. The introduction of intermolecular hydrogen bonds is verified to enhance the interfacial interactions between block copolymers, oil droplets, and polyphenols. Moreover, the dominant hydrogen-bond-driven interactions can be systematically manipulated by selecting different cosolvent systems to generate diverse porous structures from the transformation of micellar and precursor co-assembly. Impressively, hierarchically structured meso-macroporous N-doped carbon spheres present simultaneously tunable sphere sizes and mesopores and macropores, ranging from 1.2 μm, 9/50 and 227 nm to 1.0 μm, 40, and 183 nm and 480, 24, and 95 nm. As a demonstration, dendritic-like N-doped hierarchically meso-macroporous carbon spheres manifest excellent enzyme-like activity, which is attributed to the continuous mass transport from the multiordered porosity. The current study provides a new platform for the synthesis of novel well-defined porous materials.

Impact of channel nanostructures of porous carbon particles on their catalytic performance

“…As previously reported, an effective oxidation reaction necessitates continuous mass transport and exposure of more active sites during the reaction. 59 However, the closed channels significantly limit adequate mass transport. 59 Thus, completely closed channels of PCP1-PtFe result in a low k value, as OPD and H 2 O 2 struggled to reach active sites of Pt inside the channel.…”

“…As previously reported, an effective oxidation reaction necessitates continuous mass transport and exposure of more active sites during the reaction. 59 However, the closed channels significantly limit adequate mass transport. 59…”

Assembly of Amino–Quinone Networks on Avermectin@mesoporous Silica with High Deposition to Leaf Surface

“…Av was loaded into MCM-41 silica by using the solvent evaporation method. Then, HNQ and polyethylenimine were used to functionalize the surface of MCM-41 silica via Michael addition and a Schiff base reaction in a weak alkaline condition (pH 8.5). , HNQ and PEI react to form nanoaggregates in solution, which could adsorb and wind around the surface of MCM-41 silica and grow into larger aggregates, gradually fusing into a complete film to form a stable shell layer. The AQN coating on the surface of the MCM-41 silica could block the pores and confine pesticide molecules inside them, which could prevent the initial burst release of Av when placed in application scenarios.…”

Emulsion‐Directed Synthesis of Poly‐Porphyrin Nanoparticles as Heterogeneous Photocatalysts for PET‐RAFT Polymerization

“…[ 46 ] Li and co‐workers synthesized highly N‐doped porous carbon spheres with a tunable meso‐macroporous structure by using an emulsion‐induced interface assembly approach. [ 47 ] These nanospheres are good carriers for enzyme loading but are rarely employed in polymerizations and porphyrins have not yet been used in this method. Besides, the unique architectures of these nanomaterials can be used to control the catalytic efficiency.…”