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1、物理化学学报(WuliHuaxueXuebao)AprilActaPhys.-Chim.Sin.2014,30(4),789-796789[Article]doi:10.3866/PKU.WHXB201402123www.whxb.pku.edu.cn聚乙烯亚胺修饰的氧化硅纳米管基吸附剂的制备及其CO2吸附应用*姚蔓莉董艳艳谢菁贾爱平谢冠群胡庚申罗孟飞（浙江师范大学物理化学研究所,先进催化剂材料教育部重点实验室,浙江金华321004）摘要:以P123为模板,1,2-二(三甲氧基硅基)乙烷(BTME)为硅源合成了介孔氧化硅纳米
2、管(E-SNTs).将E-SNTs经过聚乙烯亚胺(PEI)修饰后制得吸附剂用于捕捉CO2.对吸附剂进行了透射电镜(TEM)、物理吸附、傅里叶变换红外(FTIR)光谱、热重分析(TGA)等表征.E-SNTs-PEI吸附剂的最佳CO2吸附温度为75°C.吸附剂的CO2吸附量随着PEI负载量的增加呈现先增大后减小的趋势,其中50%为最佳负载量,此时吸附剂的吸附量最大为3.32mmol∙g-1.相比较SBA-15基吸附剂,E-SNTs基吸附剂具有更优异的吸附性能.在有水汽的存在下,吸附剂E-SNTs-50的CO-12吸附量达到3.7
3、5mmol∙g.经过四次循环吸脱附实验测试E-SNTs-PEI吸附剂的稳定性能,结果表明其CO2吸附量基本不变,该吸附剂表现出较好的稳定性和可再生能力.关键词:介孔纳米管氧化硅;聚乙烯亚胺;吸附;CO2捕捉中图分类号:O643PreparationofPolyethylenimine-FunctionalizedSilicaNanotubesandTheirApplicationforCO2AdsorptionYAOMan-LiDONGYan-YanXIEJingJIAAi-PingXIEGuan-Qun*HUGeng-Sh
4、enLUOMeng-Fei(KeyLaboratoryoftheMinistryofEducationforAdvancedCatalysisMaterials,InstituteofPhysicalChemistry,ZhejiangNormalUniversity,Jinhua321004,ZhejiangProvince,P.R.China)Abstract:Mesoporousethane-silicananotubes(E-SNTs)weresynthesizedusingP123asatemplateand1,2
5、-bis(trimethoxysilyl)ethane(BTME)asasilicasource.E-SNTsweremodifiedwithpolyethylenimine(PEI)assorbentsforCO2adsorption.Thesenewcompositesorbentswerecharacterizedbytransmissionelectronmicroscopy(TEM),nitrogenadsorption/desorption,Fouriertransforminfrared(FTIR)spectr
6、oscopy,andthermalgravimetricanalysis(TGA).Wefoundthat75°CistheoptimaltemperatureforCO2adsorption.E-SNTswitha50%(w)PEIloading(E-SNTs-50)exhibitedahigherCO-12adsorptioncapacity(3.32mmol∙g)thantheothermaterials.TheE-SNTs-basedsorbentsshowbetterCO2captureperformancetha
7、ntheSBA-15-basedsorbents.Additionally,CO-12uptakewasfurtherenhancedto3.75mmol∙ginthepresenceofmoisture.CyclicCO2adsorption-desorptiontestresultsindicatedthatthecompositesorbentsarestableandcanberegenerated.KeyWords:Mesoporoussilicananotube;Polyethylenimine;Adsorpti
8、on;CO2capture1引言生产活动的扩大,排放在空气中的CO2气体越来越自工业化革命以来,随着人口的剧增以及工业多,导致了全球气候的变暖以及气候异常现象的加Received:December30,2013;Revised:February1,2014;PublishedonWeb:F
