简介:随着我国经济持续不断增长,城市化建设日新月异,带动和促进了我国汽车工业的快速发展.2016年,全国机动车保有量已达3.0×10^8辆,其中汽车保有量1.9×10^8辆[1].在汽车拥有量不断增多,给人们出行带来便利的同时,也造成严重的空气污染问题,导致雾霾天气越来越多,污染也越来越重.许多大中城市机动车污染物排放量居高不下,已成为PM2.5(细颗粒物)的首要来源.北京31.3%、上海29.2%、杭州28%的PM2.5均来自机动车排放[1].不断严格的环保要求形成了倒逼机制,要求提高车用燃料质量,降低污染物排放,特别是减少汽车尾气中有毒有害气体的排放,为此车用燃料标准的更新节奏也在不断加快[2~8].
简介:BMIL-53(Fe)/MWCNTshybridmaterialwaspreparedviathesolvethermalsynthesismethod.TheresultingsampleswerecharacterizedbyX-raydiffraction,FT-IRspectroscopy,scanningelectronmicroscopy,UV-Visabsorptionspectroscopy,theBrunauer-Emmet-Tellermethod,andphotoluminescencespectroscopy.TheresultshowedthattheintroductionofmultiwalledcarbonnanotubestotheMIL-53(Fe)canincreasethesurfaceareaofthecomposites,suppresstherecombinationofphotogeneratedelectron-holepairsandpromotetheelectrontransferprocess.ThehybridmaterialshowedoptimalphotocatalyticperformanceinthedegradationofRhodamineBundertheirradiationofultravioletandnaturallight.