Synthesis of Triazine-Based Porous Organic Polymers Derived N‑Enriched Porous Carbons for CO₂ Capture

Porous carbon with both high CO₂ uptake and CO₂/N₂ selectivity is desired for reducing the cost of carbon capture. Here, we report the preparation of N-enriched porous carbons (NPCs) derived from the low-cost triazine-based porous organic polymers using KOH as the activating agent under N₂. The results indicate that the nitrogen content and textural properties of the NPCs can be effectively adjusted by the polymer precursors and the carbonization temperature. Impressively, the NPCs have an enriched N content (5.56–11.33 wt %) and abundant porosity (BET surface area: 394–1873 m²/g, pore volume: 0.27–1.56 cm³/g), endowing them with high CO₂ uptake (120–207 mg/g at 273 K and 1.0 bar) and acceptable CO₂/N₂ selectivity (Henry’s law: 14.3–16.8). In particular, the ultra micropore volume (<i>d</i> ≤ 0.8 nm) is proven a key factor for the CO₂ uptake, while both the ultra micropore volume and N content contribute the CO₂/N₂ selectivity. Our described work will provide a strategy to initiate developments of rationally designed porous carbons for various potential applications

Controllable Synthesis of Polar Modified Hyper-Cross-Linked Resins and Their Adsorption of 2‑Naphthol and 4‑Hydroxybenzoic Acid from Aqueous Solution

We synthesized a series of polar hyper-cross-linked resins, and the porosity and polarity of these resins were effectively tuned by feeding different amounts of glycidyl methacrylate (GMA). As the feeding amount of GMA increased, the Brunauer–Emmett–Teller surface area, pore volume, micropore area, and micropore volume sharply decreased; the pore size distribution of the resins showed a large population of pores in the microporous region extending to a higher part of the mesoporous region, and the O content increased while the static contact angle lowered. The adsorption experiments indicated that these resins were efficient for adsorption of 2-naphthol and 4-hydroxybenzoic acid (4-HBA). The adsorption process was very fast, and the kinetic data for the adsorption of 2-naphthol could be well-fitted by a pseudo-second-order rate equation, while those for the adsorption of 4-HBA could be characterized by a pseudo-first-order rate equation