Solvent‐Free Self‐Assembly to the Synthesis of Nitrogen‐Doped Ordered Mesoporous Polymers for Highly Selective Capture and Conversion of CO2

• Published in: Advanced materials (Weinheim) Vol. 29; no. 27
• Main Authors: Liu, Fujian, Huang, Kuan, Wu, Qin, Dai, Sheng
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley Subscription Services, Inc 19-07-2017; Wiley
• Subjects: Block copolymers; carbon capture; Carbon dioxide; catalysis (heterogeneous); Catalysts; Chemical synthesis; CO2 capture and conversion; Conversion; Crystal structure; Curing; defects; INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; materials and chemistry by design; MATERIALS SCIENCE; membrane; molecular sieves; Nanocomposites; Nitrogen; nitrogen functionality; ordered mesoporosity; Polymers; Porous materials; Prepolymers; Roasting; Self-assembly; Silicon dioxide; solvent-free synthesis; Solvents; synthesis (novel materials); synthesis (scalable processing); synthesis (self-assembly); Titanium oxides
• ISSN: 0935-9648; 1521-4095
• DOI: 10.1002/adma.201700445

A solvent‐free induced self‐assembly technology for the synthesis of nitrogen‐doped ordered mesoporous polymers (N‐OMPs) is developed, which is realized by mixing polymer precursors with block copolymer templates, curing at 140–180 °C, and calcination to remove the templates. This synthetic strategy represents a significant advancement in the preparation of functional porous polymers through a fast and scalable yet environmentally friendly route, since no solvents or catalysts are used. The synthesized N‐OMPs and their derived catalysts are found to exhibit competitive CO2 capacities (0.67–0.91 mmol g−1 at 25 °C and 0.15 bar), extraordinary CO2/N2 selectivities (98–205 at 25 °C), and excellent activities for catalyzing conversion of CO2 into cyclic carbonate (conversion >95% at 100 °C and 1.2 MPa for 1.5 h). The solvent‐free technology developed in this work can also be extended to the synthesis of N‐OMP/SiO2 nanocomposites, mesoporous SiO2, crystalline mesoporous TiO2, and TiPO, demonstrating its wide applicability in porous material synthesis.
A novel and green strategy in which no solvents are used, for the fast synthesis of nitrogen‐doped ordered mesoporous polymers (N‐OMPs) is developed. The N‐OMPs display competitive CO2 capacities and extraordinary CO2/N2 selectivities, as well as excellent activity for catalytic conversion of CO2. The methodology can also be extended to the synthesis of N‐OMP/SiO2 nanocomposites, mesoporous SiO2, TiO2, and TiPO.