新型晶體智能材料可快速檢測並高效去除臭氧
作者:
小柯機器人發布時間:2020/12/18 22:34:22
南開大學張振傑研究團隊合成出能夠快速檢測並高效去除臭氧的晶體智能材料。該研究於2020年12月15日在線發表於《德國應用化學》。
研究人員首次開發了用於智能感應和有效去除臭氧的共價有機框架(COF)。值得注意的是,基於亞胺的COF在寬泛的工作條件下(例如,在有無水分的的室溫下)對臭氧的響應速度極快(<1 s),並低至0.1 ppm。
此外,研究人員發現基於亞胺的COF還可以用作出色的臭氧去除劑,可以有效地將臭氧濃度降低到推薦的人類安全限值(<0.1 ppm)以下。通過各種表徵技術和分析深入揭示了亞胺COF優異性能的機制。該研究不僅為臭氧的感測和去除提供了一種新型的先進材料,而且拓寬了COF的應用範圍。
據介紹,傳統的臭氧感測和去除材料仍然遭受高能耗和低效率的困擾。因此,尋求具有高效率和廣泛工作條件的新型臭氧響應材料具有重要意義。
附:英文原文
Title: Rational Fabrication of Crystalline Smart Materials for Rapid Detection and Efficient Removal of Ozone
Author: Dong Yan, Zhifang Wang, Peng Cheng, Yao Chen, Zhenjie Zhang
Issue&Volume: 15 December 2020
Abstract: Traditional ozone sensing and removal materials still suffer from high energy consumption and low efficiency. Thus, seeking new ozone‐responsive materials with high efficiency and broad working conditions is of great significance. In this contribution, we first developed covalent organic frameworks (COFs) for smart sensing and efficient removal of ozone. Notably, imine‐based COFs possess dramatically fast optical responses (<1 s) to ozone as low as 0.1 ppm under broad working conditions (e.g., in the presence or absence of moisture, room temperature). Moreover, we found that imine‐based COFs can also be applied as excellent ozone removers that can efficiently reduce the ozone concentration below the recommended safety limit (<0.1 ppm) for humans. The mechanism for the outstanding performance of imine‐based COFs was in‐depth unveiled by various characterization techniques and analyses. This study not only provides a new type of advanced materials for ozone sensing and removal but also broadens the application scope of COFs.
DOI: 10.1002/anie.202015629
Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202015629