TiO_(2)纳米线薄膜的水热法合成及其光催化性能研究

Study on Hydrothermal Synthesis and Photocatalytic Properties of TiO_(2) Nanowire Thin Films

以钛箔为钛源和基底,NaOH为形貌控制剂,采用水热法制备TiO_(2)纳米线薄膜.通过调控NaOH溶液的浓度,研究了形貌控制剂用量对样品晶体结构、表面形貌、光催化性能的影响,并对TiO_(2)纳米线薄膜的形成机理进行了阐述.通过SEM、XRD对样品进行表征及光催化降解,实验结果表明:随着NaOH溶液浓度的增加,TiO_(2)纳米线薄膜的表面形貌和光催化活性也随之改变;当NaOH溶液浓度为1 M时,所制得的锐钛矿型TiO_(2)薄膜表面具有均匀的一维纳米线形貌;样品在紫外光下照射10 h后,甲基橙溶液的光催化降解率达到了90%.

TiO_(2) nanowire films were prepared by hydrothermal method:titanium foil was used as the titanium source and substrate and NaOH as a morphology control agent.The effects of the dosage of morphology control agent on the crystal structure,surface morphology,and photocatalytic performance of the TiO_(2) nanowire films were studied by regulating the concentration of NaOH solution,and the growth mechanism of TiO_(2) nanowire films was elaborated.SEM,XRD characterization and photocatalytic degradation results showed that the surface morphology and photocatalytic properties of TiO_(2) nanowire films changed with the increase of NaOH solution concentration.When the concentration of NaOH solution reached 1 M,the surface of the fabricated anatase TiO_(2) films had one-dimensional nanowire morphology.Photocatalytic degradation rate of methyl orange solution reached 90%after being exposed under UV light for 10 h.