Controllable Preparation of Core–Shell Composites and Their Templated Hollow Carbons Based on a Well-Orchestrated Molecular Bridge-Linked Organic–Inorganic Hybrid Interface

Abstract

Controlling the interfacial effect is facing challenges because of the weak interactions between the inorganic and the organic materials. We found that the silane coupling agents with −NH 2 groups (e.g., KH550) play a key role as a molecular bridge that links an inorganic silica template with an organic precursor (i.e., pyrrole) in the process of constructing a spherical silica core− polypyrrole shell structure. The molecular bridge is also suitable for inorganic core templates with cube or rod shapes for the construction of different core−shell structures. These template core−polymeric shell structures can be transformed into welldefined hollow carbons after carbonization and template removal. The outer diameter, hollow-core size, and carbon shell thickness of hollow carbon materials (e.g., hollow carbon spheres) could be facilely controlled by changing the template size or the pyrrole amount. We believe that our work will provide a guideline for the preparation of well-orchestrated carbon-based composites and their templated hollow carbons.

Selective Adsorbent Design with Multifunctional Surfaces: Innovating Solutions for Heterogeneous Catalysis in Water

“…Where, the magnetic nanoparticles can be readily introduced into natural ATP according to a simplified strategy based on our previous report. 45 The aminerich (−NH 2 −) silane coupling agent (e.g., KH602) is chosen to modify the ATP template surface to form the "hydrogen bonding bridge", 46 that can interact with the −NH− groups of pyrrole monomers more uniformly for eventual formation of the superhydrophobic/superoleophilic shell by oxidation polymerization. The construction process is depicted in Scheme 1.…”

Synthesis of hypercrosslinked polymers with a spherical shell structure for highly effective cycloaddition of CO2 under ambient conditions

“…Compared with their bulk structures, the spherical shell structure provides many possibilities for structure and composition adjustment, which can be used to design functional materials for more desired applications. 26,28 In addition, the shells can be made very thin, which may lead to a more thorough exposure of the catalytically active sites, which is beneficial for improving the catalytic conversion efficiency. 29,30 These characteristics have further aroused the interest of researchers in catalytic CO 2 cycloaddition reactions using spherical shell structured materials.…”