| TiO2-CoFe2O4磁性复合材料制备及太阳光催化性能 |
| Preparation and Sunlight Photocatalytic Properties of TiO2-CoFe2O4 Magnetic Composite Materials |
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| 摘要: 以四氯化钛、三价铁盐和二价钴盐为前驱体，采用超声波技术一步合成了TiO2-CoFe2O4新型复合光催化剂，运用VSM、XRD、TEM和UV-Vis技术进行了表征，以甲基橙为模拟污染物在太阳光照射下研究其光催化活性。结果表明：所制得的样品具有良好的顺磁性，其饱和磁化强度为212 Gs；样品中TiO2和CoFe2O4分别以锐钛矿相和尖晶石结构存在，粒径尺寸在40~50 nm之间；样品在紫外-可见区有很强的吸收。光催化结果表明复合催化剂具有较高的太阳光催化活性，循环使用3次，仍能保持良好的催化活性。 |
| 关键词: 磁性 二氧化钛 复合材料 太阳光光催化剂 |
| 基金项目: |
| Abstract: A TiO2-CoFe2O4 composite photocatalyst was prepared by one-step method with ultrasound technique using TiCl4、trivalent iron salt and divalent cobalt salts as precursors. The properties of the sample were characterized by VSM、XRD、TEM and UV-Vis techniques. The photocatalyst activity was evaluated by using methyl orange aqueous solution as the model contaminant in the sunlight. The results indicated that the TiO2-CoFe2O4 composite photocatalyst showed good magnetic properties and the saturation magnetization was 212 Gs. The TiO2 and CoFe2O4 of the samples existed as anatase phase and spinel structure, respectively. The diameter of the TiO2-CoFe2O4 particles was in the range of 40~50 nm. The spectrum response was from UV to visible region and the absorbance intensity remarkably increased. The photocatalyst showed highly photocatalytic activity in the sunlight and the activity was still good enough after 3 cycles. |
| Keywords: magnetic TiO2 composite material sunlight photocatalyst |
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| 张秀玲,孙东峰,韩一丹,王 静.TiO2-CoFe2O4磁性复合材料制备及太阳光催化性能[J].无机化学学报,2011,27(7):1373-1377. |
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