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| 片状磁性纳米TiO2/SiO2/NiFe2O4制备及光催化性能 | |
| 引用本文： | 夏淑梅,陈利平,孙勇,张密林. 片状磁性纳米TiO2/SiO2/NiFe2O4制备及光催化性能[J]. 材料科学与工艺, 2008, 16(5): 621-624 |
| 作者姓名： | 夏淑梅 陈利平 孙勇 张密林 |
| 作者单位： | 1. 哈尔滨工程大学,材料科学与化学工程学院,哈尔滨,150001 2. 哈尔滨工业大学,材料科学与工程学院,150001,哈尔滨 3. 哈尔滨工程大学,航天与建筑工程学院,哈尔滨,150001 |
| 摘 要： | 以锐钛矿磁性纳米TiO2/SiO2/NiFe2O4(TSN)为原料,采用水热法制备了片状磁性纳米TSN.利用XRD、TEM等技术对样品进行了表征.水热法处理后核壳结构的TSN部分转变为片状,催化剂磁性增强.以亚甲基兰溶液为模拟水样测试了样品的光催化性能,考察了催化剂加入量、反应时间、pH值等因素的影响.实验表明:片状磁性纳米TSN光催化性能明显优于粒状TSN.片状TSN具有良好的吸附性能,提高了光催化反应的初始速率.用于处理亚甲基兰废水时受pH值的影响较小,1小时的脱色率在90%以上. |
| 关 键 词： | 片状 TiO2/SiO2/NiFe2O4 磁性光催化剂 亚甲基兰 |
Preparation and photocatalytic property of magnetic nanolamellar TiO2/SiO2/NiFe2O4 |
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| XIA Shu-mei,CHEN Li-ping,SUN Yong,ZHANG Mi-lin. Preparation and photocatalytic property of magnetic nanolamellar TiO2/SiO2/NiFe2O4[J]. Materials Science and Technology, 2008, 16(5): 621-624 | |
| Authors: | XIA Shu-mei CHEN Li-ping SUN Yong ZHANG Mi-lin |
| Affiliation: | 1(1.College of Material Science and Chemical Engineering,Harbin Engineering University,Harbin 150001,China;2.School of Materials Sciente and Engineering Harbin Institutive of Technology;3.College of Aerospace and Civil Harbin Engineering,Engineering University,Harbin 150001,China) |
| Abstract: | The magnetic nanocomposite TiO2/SiO2/NiFe2O4(TSN) was prepared by the sol-gel processing used as a starting precursor.The magnetic nanolamellar TSN was prepared by the hydrothermal processing in the NaOH solution at 120 ℃ for 24 h.The specimes were characterized using XRD and TEM techniques.After the hydrothermal processing,the core-shell structure of TSN was partially turned to the lamellar shape and the catalyst,s magnetism was enhanced.The photocatalytic performance was evaluated by the photooxidation of methylene blue as probe reaction.The effects of different factors on the photo-catalytic degradation,including the dosage of photocatalyst,the irradiation time and the pH value,were discussed.The experimental results indicate that the photocatalytic performance of nanolamellar TSN obviously surpasses the granular TSN.The initial speed of photocatalytic reaction is enhanced because of the superior adsorption performance of the nanolamellar TSN.The pH value has little influence on the decoloration rate of photocatalytic reaction,and the rate of degradation can reach over 90% after 1h irradiation. |
| Keywords: | TiO2/SiO2/NiFe2O4 |
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