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为了开发高活性的二氧化钛(TiO2)光催化剂,通过简易的两步法制备了TiO2薄膜.首先将钛片放入氮化钛(TiN)纳米颗粒悬浮液中,然后干燥这一体系制得TiN/Ti薄膜,最后通过煅烧TiN薄膜前驱体制备了平整均一的二氧化钛(TiO2)薄膜.通过考察退火温度对样品光吸收性能的影响,确定最优退火温度为500℃.在此条件下制备的TiO2为多晶锐钛矿,吸收边带400 nm.以制备的TiO2薄膜为催化剂,3 h内苯酚的降解率达到88%,远大于使用德固赛TiO2(P25)时的62%,制备的二氧化钛薄膜比P25显示出更优良的光催化性能,其光催化降解苯酚的动力学常数为P25的2.2倍.
In order to develop highly active TiO 2 photocatalyst, a simple two-step method was used to prepare the TiO 2 thin film.Firstly, the TiO 2 film was placed in the TiN nanoparticle suspension and then dried to obtain the TiN / Ti film was prepared and a uniform and uniform TiO2 film was prepared by calcining TiN film precursor.The optimal annealing temperature was determined to be 500 ° C by investigating the effect of annealing temperature on the light absorption properties of the sample.The TiO2 prepared under these conditions was Polycrystalline anatase with an absorption sideband of 400 nm.The degradation rate of phenol in 3 hours was 88%, which was much higher than 62% when Degussa TiO2 (P25) was used in the preparation of TiO2 film as catalyst. The prepared titania film ratio P25 showed better photocatalytic performance, its photocatalytic degradation of phenol kinetic constants of P25 2.2 times.