Fan Zhenglong, Liao Fan, Shi Huixian, Liu Yang, Dang Qian, Shao Mingwang, Kang Zhenhui
Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Road, Suzhou, Jiangsu 215123, PR China.
Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Road, Suzhou, Jiangsu 215123, PR China.
iScience. 2020 Jan 24;23(1):100806. doi: 10.1016/j.isci.2019.100806. Epub 2019 Dec 27.
The efficient conversion of carbon dioxide (CO) into useful chemicals has important practical significance for environmental protection. Until now, direct fixation of atmospheric CO needs first extraction from the atmosphere, an energy-intensive process. Silicon (or Si-H surface), Earth-abundant, low-cost and non-toxic, is a promising material for heterogeneous CO chemical fixation. Here we report one-step fixing of CO directly from the atmosphere to a paraformaldehyde-like polymer by Si-H surface at room temperature. With the assistance of HF, commercial silicon powder was used as a heterogeneous reducing agent, for converting gaseous CO to a polymer of fluorine substituted polyoxymethylene and hydroxyl substituted polyoxymethylene alternating copolymer (F-POM). Making use of the Si-H surface toward the fixation of atmospheric gaseous CO is a conceptually distinct and commercially interesting strategy for making useful chemicals and environmental protection.
将二氧化碳（CO₂）高效转化为有用的化学品对环境保护具有重要的现实意义。到目前为止，直接固定大气中的CO₂首先需要从大气中提取，这是一个能源密集型过程。硅（或Si-H表面）在地壳中储量丰富、成本低廉且无毒，是一种用于多相CO₂化学固定的很有前景的材料。在此，我们报道了在室温下通过Si-H表面将大气中的CO₂直接一步固定为类似低聚甲醛的聚合物。在HF的辅助下，商业硅粉被用作多相还原剂，用于将气态CO₂转化为氟取代聚甲醛和羟基取代聚甲醛交替共聚物（F-POM）的聚合物。利用Si-H表面固定大气中的气态CO₂是一种在概念上独特且具有商业价值的策略，可用于制造有用的化学品和环境保护。
