CAJ | 학술논문

采用蒸汽相水解法，以 Fe3 O4纳米磁性颗粒为磁核，在其表面包覆一层 SiO2来阻止光腐蚀，然后将锐钛矿相纳米氧化钛沉积在 Fe3 O4/SiO2颗粒表面，从而制得核壳结构的 Fe3 O4/SiO2/TiO2磁性复合光催化材料。用 X 射线粉末衍射仪（XRD）、场发射扫描电镜（FE-SEM）、高分辨率透射电子显微镜（HR-TEM）、探针式震动磁强计等手段对所制备的产物的结构、形貌、磁强度性能进行表征。以300 W 汞灯为光源，用亚甲基蓝和酸性红模拟污水中的有机染料来评价复合光催化剂的性能。结果表明，磁性纳米微球中 TiO2的含量越大，其光催化性能越好，含 TiO2质量分数50％的 F3 O4/SiO2/TiO2磁性纳米微球可在180 min 内降解亚甲基蓝模拟染料废水，降解率达99％，在80 min 内降解酸性模拟染料废水，降解率达98％。
채용증기상수해법，이 Fe3 O4납미자성과립위자핵，재기표면포복일층 SiO2래조지광부식，연후장예태광상납미양화태침적재 Fe3 O4/SiO2과립표면，종이제득핵각결구적 Fe3 O4/SiO2/TiO2자성복합광최화재료。용 X 사선분말연사의（XRD）、장발사소묘전경（FE-SEM）、고분변솔투사전자현미경（HR-TEM）、탐침식진동자강계등수단대소제비적산물적결구、형모、자강도성능진행표정。이300 W 홍등위광원，용아갑기람화산성홍모의오수중적유궤염료래평개복합광최화제적성능。결과표명，자성납미미구중 TiO2적함량월대，기광최화성능월호，함 TiO2질량분수50％적 F3 O4/SiO2/TiO2자성납미미구가재180 min 내강해아갑기람모의염료폐수，강해솔체99％，재80 min 내강해산성모의염료폐수，강해솔체98％。
Anatase TiO2 nanoparticles were deposited on the composite Fe3 O4/SiO2 ,where Fe3 O4 acted as the magnetic core and SiO2 acted as the protective coating against the photo corrosion of Fe3 O4 .Thus,the multi-layer composite of Fe3 O4/SiO2/TiO2 were obtained.The structure,morphology,magnetic characterization of the prepared product were characterized by the means of X-ray powder diffraction (XRD),field emission scanning electron microscope (FE-SEM),high resolution transmission electron microscopy (HR-TEM)and vibrating magnetometer probe.With 300 W mercury lamp as a light source,both methylene blue and acid red were used to simulate organic wastewater,the composite catalytic properties of visible light photocatalyst were evalua-ted.The results show that the greater the magnetic nanoparticles in TiO2 content,the better the photocatalytic properties. Fe3 O4/SiO2/TiO2 magnetic nanospheres containing TiO2 50% (mass fraction)can degrade 99% of methylene blue dye in wastewater for 180 min,while it degrade 98% of acid red G in the simulated wastewater under irradiation for 80 min.