TiO_(2)/FACs与TiO_(2)/Mullite复合材料的制备及其光催化性能  

Preparation and Photocatalytic Properties of TiO_(2)/FACs and TiO_(2)/Mullite Composites

作　　者：胡其国 李济[1] 马岚[1] 李小龙[1] HU Qiguo;LI Ji;MA Lan;LI Xiaolong(Jiangxi Arts&Ceramics Technology Institute,School of Materials and Mechanical Engineering,Jingdezhen 333001,China)

机构地区：[1]江西陶瓷工艺美术职业技术学院材料与机械工程学院,景德镇333001

出　　处：《中国陶瓷》2023年第1期26-31,共6页China Ceramics

基　　金：江西省教育厅科技重点项目(GJJ204301);江西陶瓷工艺美术职业技术学院校级科技专项项目(XJ2021-KJ002)。

摘　　要：分别以粉煤灰漂珠(简记为FACs)与海胆状莫来石球(简记为Mullite)为基体,采用溶胶浸渍工艺制备了TiO_(2)/FACs与TiO_(2)/Mullite型复合材料。通过X射线衍射(XRD)、扫描电子显微镜(SEM)以及电子能谱(EDS)对制备的材料进行了表征。研究了TiO_(2)/FACs与TiO_(2)/Mullite型复合材料在紫外光照射下对罗丹明B(RhB)的光催化性能。结果表明:经500℃煅烧后形成的锐钛矿型TiO_(2)均成功负载到粉煤灰漂珠与莫来石晶体上,在粉煤灰漂珠表面覆盖了一层厚薄不均的纳米级别的TiO_(2)薄膜,而在莫来石晶体上则出现了大量细小的TiO_(2)颗粒;在降解染料时间为180 min,TiO_(2)/FACs与TiO_(2)/Mullite复合材料对罗丹明B染料的降解率分别为84.8%和96.4%,降解速率为0.01088min-1和0.02885 min-1。TiO_(2)/FACs and TiO_(2)/Mullite composites were prepared by sol impregnation process using fly ash hollow spheres(Abbreviated as FACs) and urchin shaped Mullite(Abbreviated as Mullite) as substrates,respectively. The prepared materials were characterized by X-ray diffraction(XRD), scanning electron microscopy(SEM) and electron energy spectrum(EDS). The catalytic performance of TiO_(2)/FACs and TiO_(2)/Mullite composites for degradation of Rhodamine B(RhB) under UV irradiation was discussed. The results showed that the anatase TiO_(2)formed after calcination at 500 ℃ was successfully loaded on fly ash hollow spheres and mullite crystals. The surface of fly ash hollow spheres is covered with a layer of uneven nanolevel TiO_(2)film, and a large number of fine TiO_(2)particles appear on the mullite crystals. The degradation rates of rhodamine B dye by TiO_(2)/FACs and TiO_(2)/Mullite composites were 84.8% and 96.4%, respectively,and the degradation rates were 0.01088 min-1and 0.02885 min-1at a degradation time of 180 minutes.

关 键 词：粉煤灰漂珠 莫来石 TiO_(2) TiO_(2)/FACs TiO_(2)/Mullite 光催化 

分 类 号：TQ174.758.11[化学工程—陶瓷工业]