CAJ | 학술논문

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,3h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.
위료개발고활성적이양화태(TiO2)광최화제,통과간역적량보법제비료TiO2박막.수선장태편방입담화태(TiN)납미과립현부액중,연후간조저일체계제득TiN/Ti박막,최후통과단소TiN박막전구체제비료평정균일적이양화태(TiO2)박막.통과고찰퇴화온도대양품광흡수성능적영향,학정최우퇴화온도위500℃.재차조건하제비적TiO2위다정예태광,흡수변대400 nm.이제비적TiO2박막위최화제,3h내분분적강해솔체도88％,원대우사용덕고새TiO2 (P25)시적62％,제비적이양화태박막비P25현시출경우량적광최화성능,기광최화강해분분적동역학상수위P25적2.2배.
In order to develop TiO2 film photocatalyst with high photocatalytic activity,uniform TiO2 film was prepared by annealing TiN film,which was fabricated by a facile method including two steps:putting Ti wafer into a stable TiN nanoparticle suspension and then drying this system to obtain TiN/Ti film.The annealing temperature was optimized and the optimal one was 500 ℃.TiO2 prepared at the temperature had a polycrystalline anatase structure,and its absorption edge was about 400 nm.The photocatalytic degradation efficiency of phenol on the TiO2 film was up to 88％ in 3 h,whereas it was only 62％ on TiO2-P25.The kinetic constant of phenol degradation on the TiO2 film was 2.2 times as great as that on TiO2-P25.Hence,the TiO2 film displayed better photocatalytic ability than TiO2-P25 film.