He Xinmiao, Jia Shuangyi, Bao Bingbing, Li Yihang, Wang Enchao, Chen Li, Dan Hui, Ding Yi
School of National Defence Science & Technology, Southwest University of Science and Technology, Mianyang 621010, PR China.
School of National Defence Science & Technology, Southwest University of Science and Technology, Mianyang 621010, PR China.
J Hazard Mater. 2024 Sep 15;477:135413. doi: 10.1016/j.jhazmat.2024.135413. Epub 2024 Aug 5.
Developing recyclable adsorbents for co-capture of I and CHI gas is a meaningful and challenging topic. Herein, Cu-based mesoporous silica (C-S) materials were synthesized and applied for CHI capture for the first time. Factors (Cu content, temperature, contact time and CHI concentration) affecting the adsorption behavior were investigated. The results demonstrated that the CHI adsorption capacity of the obtained C-S materials reached up to 1060 mg/g at 200 ℃. Furthermore, the C-S material exhibited excellent reusability (91.3 %, 5 cycles). It was found that Cu could cleave the carbon iodine bonds, causing CHI to dissociate into •CH and I. Then the Cu converted from Cu reacted with I to achieve the purpose of CHI capture. The adsorption mechanism of CHI on the C-S materials could be concluded that Cu reacted with CHI form CuI (Cu + CHI → CuI + •CH). This work suggested that the obtained C-S materials could be promising adsorbents for CHI capture.
开发用于同时捕获碘和碘甲烷（CHI）气体的可回收吸附剂是一个有意义且具有挑战性的课题。在此，首次合成了铜基介孔二氧化硅（C-S）材料并将其应用于碘甲烷的捕获。研究了影响吸附行为的因素（铜含量、温度、接触时间和碘甲烷浓度）。结果表明，所得C-S材料在200℃下对碘甲烷的吸附容量高达1060 mg/g。此外，C-S材料表现出优异的可重复使用性（91.3%，5次循环）。研究发现，铜可以裂解碳碘键，使碘甲烷分解为•CH和I。然后，由铜转化而来的铜与I反应，实现捕获碘甲烷的目的。碘甲烷在C-S材料上的吸附机理可以总结为铜与碘甲烷反应生成碘化亚铜（Cu + CHI → CuI + •CH）。这项工作表明，所获得的C-S材料有望成为捕获碘甲烷的吸附剂。
