CAJ | 학술논문

采用改进 St?ber 法制备超顺磁 Fe3O4@SiO2复合粒子作为催化剂载体，再通过浸渍法将 H3PW12O40(HPW)负载在 Fe3O4@SiO2载体上，制备了一系列超顺磁负载型催化剂 HPW/Fe3O4@SiO2。并使用 X 射线衍射(XRD)、傅里叶红外(FT-IR)、氨的程序升温脱附（NH3-TPD）、扫描电镜（SEM）、N2吸附-脱附和振动样品强磁计(VSM)对催化剂进行表征。结果表明，HPW固定并均匀分散在Fe3O4@SiO2载体上，40%HPW/Fe3O4@SiO2催化剂具有较高的饱和磁强度(30.1 emu·g-1)和较大的比表面积(303.6 m2·g-1)，并可用外加磁场进行分离。采用40%HPW/Fe3O4@SiO2催化噻吩与1-辛烯组成的模拟汽油的烷基化脱硫反应，在160℃下反应2 h，噻吩转化率达到85.5%，有较好的催化脱硫性能，且可以多次循环利用。
채용개진 St?ber 법제비초순자 Fe3O4@SiO2복합입자작위최화제재체，재통과침지법장 H3PW12O40(HPW)부재재 Fe3O4@SiO2재체상，제비료일계렬초순자부재형최화제 HPW/Fe3O4@SiO2。병사용 X 사선연사(XRD)、부리협홍외(FT-IR)、안적정서승온탈부（NH3-TPD）、소묘전경（SEM）、N2흡부-탈부화진동양품강자계(VSM)대최화제진행표정。결과표명，HPW고정병균균분산재Fe3O4@SiO2재체상，40%HPW/Fe3O4@SiO2최화제구유교고적포화자강도(30.1 emu·g-1)화교대적비표면적(303.6 m2·g-1)，병가용외가자장진행분리。채용40%HPW/Fe3O4@SiO2최화새분여1-신희조성적모의기유적완기화탈류반응，재160℃하반응2 h，새분전화솔체도85.5%，유교호적최화탈류성능，차가이다차순배이용。
Fe3O4@SiO2 nanocomposite was prepared via modified St?ber method and used as catalyst support. Superparamagnetic supported catalystsprepared by loading H3PW12O40 (HPW) onto Fe3O4@SiO2 support through a wet impregnation method, were used for alkylation reaction, and characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR), NH3-temperature programmed desorption (TPD), scanning electron microscope (SEM), N2-adsorption and vibrating sample magnetometer (VSM). Their physicochemical characterization revealed that HPW had been immobilized and dispersed on Fe3O4@SiO2. Moreover, 40%(mass) HPW loading catalyst, been of high magnetization 30.1 emu·g-1, mesoporous structure and the surface area 303.6 m2·g-1, could be considered to be a proper catalyst for olefinic alkylation of thiophenic sulfur (OATS) and they can be easy separated by external magnetic field. In addition, their catalytic activity was also investigated in alkylation reaction of a model mixture of thiophene and 1-octene, and the conversion of thiophene was up to 85.5%after 2 h at 160℃.