磁靶向纳米Fe3O4-TiO2复合物的制备及其对肝癌细胞的光催化杀伤效应

引用本文: 文雯, 高晓亚, 宋志英, 韩冬, 王娟, 朱美霞, 张爱平. 磁靶向纳米Fe₃O₄-TiO₂复合物的制备及其对肝癌细胞的光催化杀伤效应[J]. 物理化学学报, doi: 10.3866/PKU.WHXB201206151 shu

Citation: WEN Wen, GAO Xiao-Ya, SONG Zhi-Ying, HAN Dong, WANG Juan, ZHU Mei-Xia, ZHANG Ai-Ping. Preparation of Magnetic Targeted Fe₃O₄-TiO₂Nanoparticles and Their Photocatalytic Killing Effect on Hepatoma Carcinoma Cells[J]. Acta Physico-Chimica Sinica, doi: 10.3866/PKU.WHXB201206151 shu

磁靶向纳米Fe₃O₄-TiO₂复合物的制备及其对肝癌细胞的光催化杀伤效应

基金项目:
山西省自然科学基金(2010011048-1) (2010011048-1)

太原市2012 年科学技术发展计划大学生创新创业项目(120164073) (120164073)

山西医科大学2011 年大学生创新基金资助

摘要:

采用三种低温溶胶-凝胶法制备了具有不同Fe₃O₄掺杂量的磁靶向纳米Fe₃O₄-TiO₂复合物, 通过X射线衍射(XRD)、透射电镜(TEM)、傅里叶变换红外(FTIR)光谱、紫外-可见(UV-Vis)光谱、荧光光谱(FS)及磁性能分析等表征方法筛选出包覆均匀、分散性好、磁性能优异及光催化活性较高的纳米Fe₃O₄-TiO₂复合物. 以四甲基偶氮唑蓝(MTT)法检测肝癌细胞(HepG2)的存活率, 考察纳米Fe₃O₄-TiO₂复合物在外磁场作用下对HepG2 细胞的光催化杀伤效应. 结果表明: 采用方法三制备的5%(质量分数)Fe₃O₄-TiO₂复合物具备核-壳结构, 在混悬液中分散性较好, 平均粒径约为50 nm, 具有较强的光催化活性和良好的磁响应性, 同时将纳米TiO₂的光响应范围拓宽至444 nm; 在外磁场作用下, 紫外光和可见光激发纳米Fe₃O₄-TiO₂复合物对HepG2细胞的杀伤效应差异不大, 且均强于纳米TiO₂; 其杀伤效应在0-1.0 T范围内随着外磁场强度的增大而增强.

关键词:

English

Preparation of Magnetic Targeted Fe₃O₄-TiO₂Nanoparticles and Their Photocatalytic Killing Effect on Hepatoma Carcinoma Cells

1.
College of Pharmacy, Shanxi Medical University, Taiyuan 030001, P. R. China
Received Date: 17 April 2012
Available Online: 02 August 2012
Fund Project:
山西省自然科学基金(2010011048-1)

太原市2012 年科学技术发展计划大学生创新创业项目(120164073)

山西医科大学2011 年大学生创新基金资助

Abstract:

Fe₃O₄-TiO₂ nanoparticles with different doped amounts of Fe₃O₄ were prepared by three sol-gel methods at low temperature. They were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectroscopy, ultraviolet-visible (UV-Vis) spectroscopy, fluorescence spectroscopy (FS), and magnetic performance. The nanoparticles which had uniform coating, od dispersion, excellent magnetism, and high photocatalytic activity were screened. The survival rates of hepatoma carcinoma cells (HepG2) were measured by MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide) cell proliferation assay, and the photo-killing effect of screened Fe₃O₄-TiO₂ nanoparticles on HepG2 cells was investigated in different external magnetic fields. The results indicated that the core-shell structure 5% (mass fraction) Fe₃O₄-TiO₂ nanoparticles prepared by the third method displayed od dispersion in suspension, high photocatalytic activity, and excellent magnetic responsivity. The average particle size of the 5%Fe₃O₄-TiO₂ particles was 50 nm. Meanwhile, the photoresponsive range of TiO₂ was extended to 444 nm. In the external magnetic fields, the Fe₃O₄-TiO₂ nanoparticles excited either by ultraviolet or visible light showed no obvious difference on killing effect, while in both cases had a higher killing effect than that of nano-TiO₂. Furthermore, the killing effect was enhanced with the increased magnetic field strength in the range of 0-1.0 T.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

磁靶向纳米Fe₃O₄-TiO₂复合物的制备及其对肝癌细胞的光催化杀伤效应

English

Preparation of Magnetic Targeted Fe₃O₄-TiO₂Nanoparticles and Their Photocatalytic Killing Effect on Hepatoma Carcinoma Cells

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