CAJ | 학술논문

固体酸催化剂的无腐蚀、环境友好和可循环使用等特点使其成为无机液体酸的最佳替代物。磁性纳米固体酸具有优于常规固体酸催化剂的催化活性及分离简单的特性。用共沉淀法分别合成了一系列三组分TiO2-Al2O3-Fe3O4(TAF)和CeO2-Al2O3-Fe3O4(CAF)及四组分ZrO2-Al2O3-CeO2-Fe3O4(ZACF)磁性纳米复合氧化物固体酸催化剂，通过电感耦合等离子体原子发射光谱、比表面积测定、X射线衍射、透射电镜、热重分析和红外光谱等对其进行了表征，并利用酯化反应作为探针反应评价了其催化性能。结果表明，合成的磁性纳米固体酸催化剂在酯化反应中表现出很好的催化活性。
고체산최화제적무부식、배경우호화가순배사용등특점사기성위무궤액체산적최가체대물。자성납미고체산구유우우상규고체산최화제적최화활성급분리간단적특성。용공침정법분별합성료일계렬삼조분TiO2-Al2O3-Fe3O4(TAF)화CeO2-Al2O3-Fe3O4(CAF)급사조분ZrO2-Al2O3-CeO2-Fe3O4(ZACF)자성납미복합양화물고체산최화제，통과전감우합등리자체원자발사광보、비표면적측정、X사선연사、투사전경、열중분석화홍외광보등대기진행료표정，병이용지화반응작위탐침반응평개료기최화성능。결과표명，합성적자성납미고체산최화제재지화반응중표현출흔호적최화활성。
Solid acid catalysts are superior to traditional liquid acids because they are noncorrosive, environ‐mentally benign, and recyclable. In addition, nano‐magnetic solid acid catalysts are preferable as they exhibit large specific surface areas together with good acidity and are also readily separated from the post‐reaction mixture. Three component nano‐magnetic solid catalysts TiO2‐Al2O3‐Fe3O4 and CeO2‐Al2O3‐Fe3O4 and a four component catalyst ZrO2‐Al2O3‐CeO2‐Fe3O4 were synthesized by a co‐precipitation method and were subsequently characterized by inductively coupled plas‐ma‐atomic emission spectroscopy, Brunauer‐Emmett‐Teller surface area analysis, X‐ray diffraction, transmission electron microscopy, and thermal gravimetric analysis. Their catalytic activities were also evaluated in the esterification reaction of acetic acid with n‐butanol. The results demonstrated that these rare earth‐based magnetic nanocomposites exhibited good catalytic activity.