N 1-(3-trimethoxysilylpropyl)diethylenetriamine grafted ordered mesoporous silica KIT-6 for CO2 adsorption

8th International Conference on Environment Science and Engineering

生态环境科学

Mei, D.J.^1 ; Wei, J.W.^1

College of Environmental Science and Engineering, Guilin University of Technology, Guilin

541004, China^1

关键词: Adsorption capacities;    Diethylenetriamine;    Gravimetric analyzers;    Nitrogen adsorption;    Ordered mesoporous silicas;    Structure directing agents;    Tetraethyl orthosilicates;    Thermal gravimetric analyses (TGA);   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/167/1/012028/pdf
DOI  :  10.1088/1755-1315/167/1/012028

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Pure KIT-6 was synthesized by using tri-block copolymer P123 as the structure directing agent and tetraethyl orthosilicate (TEOS) as the silica source. It was functionalized with N 1-(3-trimethoxysilylpropyl)diethylenetriamine (denoted as 3N) by grafting in solvent at 80 °C. The materials were characterized by X-ray powder diffraction (XRD) and nitrogen adsorption/desorption and thermal gravimetric analysis (TGA). The CO2 adsorption capacity was studied in a gravimetric analyzer. The resulted showed that the pore structure of KIT-6 was well kept after grafting of amine groups while surface area, pore size and pore volume were decreased. The CO2 adsorption capacities of 3N-KIT-6 increased first and then decreased with the increase of 3N loading. The maximum adsorption capacity is 3.017mmol/g.