Dipartimento di Chimica e Biologia "Adolfo Zambelli", Università degli Studi di Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Italy.
Molecules. 2020 Nov 10;25(22):5241. doi: 10.3390/molecules25225241.
High-porosity monolithic composite aerogels of syndiotactic polystyrene (sPS) and poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) containing reduced graphene oxide (r-GO) were prepared and characterized. The composite aerogels obtained by supercritical carbon dioxide (scCO) extraction of sPS/r-GO and PPO/r-GO gels were characterized by a fibrillar morphology, which ensured good handling properties. The polymer nanoporous crystalline phases obtained within the aerogels led to high surface areas with values up to 440 m g. The role of r-GO in aerogels was studied in terms of catalytic activity by exploring the oxidation capacity of composite PPO and sPS aerogels toward benzyl alcohol in diluted aqueous solutions. The results showed that, unlike sPS/r-GO aerogels, PPO/r-GO aerogels were capable of absorbing benzyl alcohol from the diluted solutions, and that oxidation of c.a. 50% of the sorbed benzyl alcohol molecules into benzoic acid occurred.
高孔隙率的间规聚苯乙烯（sPS）和聚（2,6-二甲基-1,4-苯撑氧化物）（PPO）的复合整体气凝胶，其中含有还原氧化石墨烯（r-GO），已被制备和表征。通过超临界二氧化碳（scCO）从 sPS/r-GO 和 PPO/r-GO 凝胶中萃取得到的复合气凝胶具有纤维形态，这确保了良好的处理性能。气凝胶内形成的聚合物纳米多孔结晶相导致了高达 440 m²/g 的高比表面积。通过探索复合 PPO 和 sPS 气凝胶在稀释水溶液中对苯甲醇的氧化能力，从催化活性方面研究了 r-GO 在气凝胶中的作用。结果表明，与 sPS/r-GO 气凝胶不同，PPO/r-GO 气凝胶能够从稀释溶液中吸收苯甲醇，并且吸附的苯甲醇分子中约有 50%被氧化成苯甲酸。
