CAJ | 학술논문

采用液相沉积法制备出了纳米SiO_2-Fe_3O_4复合粒子,并在其表面负载ZnO,得到了易于磁性固液分离的磁载光催化剂ZnO/SiO_2-Fe_3O_4,并通过傅立叶红外光谱仪、X射线衍射仪和透射电子显微镜等对光催化剂进行了表征.以亚甲基蓝为目标降解物,研究了光催化剂在紫外光下的光催化活性.实验结果表明,在Fe_3O_4和ZnO之间包覆一层无定形SiO_2可使亚甲基蓝降解率由20.34%提高到94.52%,所制备的ZnO/SiO_2-Fe_3O_4在3次重复使用后仍能保持较好的光催化性能.
채용액상침적법제비출료납미SiO_2-Fe_3O_4복합입자,병재기표면부재ZnO,득도료역우자성고액분리적자재광최화제ZnO/SiO_2-Fe_3O_4,병통과부립협홍외광보의、X사선연사의화투사전자현미경등대광최화제진행료표정.이아갑기람위목표강해물,연구료광최화제재자외광하적광최화활성.실험결과표명,재Fe_3O_4화ZnO지간포복일층무정형SiO_2가사아갑기람강해솔유20.34%제고도94.52%,소제비적ZnO/SiO_2-Fe_3O_4재3차중복사용후잉능보지교호적광최화성능.
Nano-particle SiO_2-Fe_3O_4 was prepared by liquid phase deposition method and coated with ZnO to obtain magnetic photocatalyst ZnO/SiO_2-Fe_3O_4, which can be easily separated from liquid in magnetic field. The photocatalyst was characterized by means of FTIR, XRD, TEM and so on, and its photocatalytic activity under UV-light was studied using methylene blue as degradation object. The experimental results show that an amorphous SiO_2 film between Fe_3O_4 and ZnO can significantly increase the degradation rate of methylene blue from 20. 34% to 94. 52% , and the photocatalytic activity of ZnO/SiO_2-Fe_3O_4 remains high after 3 times of reuse.