Metal–Organic Complexes@Melamine Foam Template Strategy to Prepare Three-Dimensional Porous Carbon with Hollow Spheres Structures for Efficient Organic Vapor and Small Molecule Gas Adsorption

Abstract

Three-dimensional (3D) porous carbon materials have received substantial attention owing to their unique structural features. However, the synthesis of 3D porous carbon, especially 3D porous carbon with hollow spheres structures at the connection points, still pose challenges. Herein, we first develop a metal−organic complexes@ melamine foam (MOC@MF) template strategy, by using hot-pressing and carbonization method to synthesize 3D porous carbon with hollow spheres structures (denoted as NOPCs). The formation mechanism of NOPCs can be attributed to the difference in Laplace pressure and surface energy gradient between the carbonized MOC and carbonized MF. These rare 3D porous carbons exhibit high BET surface area (2453.8 m 2 g −1 ), N contents (10.5%), and O contents (16.3%). Moreover, NOPCs show significant amounts of toluene and methanol at room temperature, reaching as high as 1360 and 1140 mg g −1 . The adsorption amounts of SO 2 and CO 2 for NOPCs are up to 93.1 and 445 mg g −1 . Theoretical calculation indicates surfaces of porous carbon with N and O coexistence could strongly enhance adsorption with high adsorption energy of −65.83 kJ mol g −1 .

Hollow Carbon Nanopillar Arrays Encapsulated with Pd–Cu Alloy Nanoparticles for the Oxygen Evolution Reaction

“…As shown in Figure 1d, adjacent layers can be stacked into a supramolecular architecture through hydrogen-bond interactions. 37,38 Furthermore, regarding the hydrogen bonding interaction and HMTA as the linker, and the center metal in Cu-BDC-HMTA as 6-connected node, the supramolecular constructure can be simplified to a pcu topology with the point symbol of {4 12 •6 3 } (Figure 1e). 39,40 Detailed crystallographic data of Cu-BDC-HMTA are listed in Tables S1 and S2.…”

“…While Cu (2) is six-coordinated with an octahedral geometry structure and connected with one N atom and five O atoms, two O atoms are from two BDC ligands, the other two O atoms are provided by the same nitrate group, and the last one O is from the coordinate water molecule as well as one N atom provided by the N-donor ligand. As shown in Figure d, adjacent layers can be stacked into a supramolecular architecture through hydrogen-bond interactions. , Furthermore, regarding the hydrogen bonding interaction and HMTA as the linker, and the center metal in Cu-BDC-HMTA as 6-connected node, the supramolecular constructure can be simplified to a pcu topology with the point symbol of {4 12 ·6 3 } (Figure e). , Detailed crystallographic data of Cu-BDC-HMTA are listed in Tables S1 and S2.…”

Preparation of Three-Dimensional MF/Ti3C2Tx/PmPD by Interfacial Polymerization for Efficient Hexavalent Chromium Removal

“…Melamine foam (MF) has the advantages of light weight, high porosity, acid and alkali resistance, and high thermal stability [14][15][16]. In addition, MF is cheap and easy to obtain, and can be customized according to needs.…”