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锐钛矿纳米管的微波水热制备及其吸附–光催化性能

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Abstract:

以锐钛矿TiO2颗粒(TO)为前驱体,经浓碱水热制得钛酸盐纳米管(TNT),之后采用微波水热法制备锐钛矿纳米管(WTNT)材料。用X射线衍射分析、透射电子显微镜和紫外–可见漫反射对样品进行了表征。研究了所制备材料对四环素的吸附–光催化降解性能。结果表明在2.0MPa条件下合成的WTNT为纯锐钛矿相;经过微波水热后的WTNT仍为中空管状结构,其外径约为10nm,管长100~200nm;TNT和WTNT的禁带宽度均大于前驱体TO的带隙;3种催化剂对四环素的吸附过程均服从准二级动力学过程;WTNT在3种催化剂中表现出对四环素最好的光降解效果。

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