磁性响应TNTs复合材料的制备与研究

Preparation and Research of Magnetic Response TNTs Composites

采用碱性水热法,以平均粒径为25 nm锐钛矿晶的二氧化钛(P_(25))为前驱体制备二氧化钛纳米管(TNTs),后采用水热真空煅烧法合成可磁分离缺陷型Fe_(3)O_(4)@TNTs复合材料。利用SEM、XRD表征分析了Fe_(3)O_(4)@TNTs复合材料的形貌、晶型结构。通过模拟光照下可磁分离缺陷Fe_(3)O_(4)@TNTs复合材料光催化吸附降解40 mg/L罗丹明B的实验,分析了Fe_(3)O_(4)@TNTs复合材料的吸附性能及其光催化性能,实验的同时设置无催化剂添加的对照组。结果表明,可磁分离Fe_(3)O_(4)@TNTs纳米复合材料的光催化能力较好,并且在光照90 min后Fe_(3)O_(4)@TNTs复合材料光催化降解罗丹明B去除率达到54.4%,所制备的可磁分离缺陷型Fe_(3)O_(4)@TNTs复合材料具有优良的吸附和光催化性能,并可以通过外加磁场进行磁分离和回收。

Using anatase titanium dioxide(P_(25))with an average particle size of 25 nm as the precursor,titanium dioxide nanotubes(TNTs)are prepared by alkaline hydrothermal method and then magnetically separable Fe_(3)O_(4)@TNTs composites are synthesized by hydrothermal vacuum calcination.The morphology and crystal structure of Fe_(3)O_(4)@TNTs composites are analyzed by SEM and XRD.The adsorption performance and photocatalytic performance of Fe_(3)O_(4)@TNTs composites are analyzed by simulating the photocatalytic adsorption and degradation of 40 mg/L Rhodamine B by Fe_(3)O_(4)@TNTs composites with magnetic separation defects under simulated light.The results show that the magnetically separable Fe_(3)O_(4)@TNTs nanocomposites have better photocatalytic ability,and the photocatalytic degradation of Rhodamine B by Fe_(3)O_(4)@TNTs composites reaches 54.4%after 90 minutes of illumination.The prepared magnetically separable defect-type Fe_(3)O_(4)@TNTs composites have excellent adsorption performance and photocatalytic performance,and can be carried out by an external magnetic field.