煅烧温度对TiO_(2)/FACs与TiO_(2)/Mullite复合材料物相结构及其光催化性能的影响  

Effect of Calcination Temperature on the Phase Structure and Photocatalytic Performance of TiO_(2)/FACs and TiO_(2)/Mullite Composites

作　　者：胡其国 李鑫浩 李济[1] 李小龙[1] HU Qiguo;LI Xinhao;LI Ji;LI Xiaolong(School of Materials and Mechanical Engineering,Jiangxi Arts&Ceramics Technology Institute,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7期35-40,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：采用溶胶浸渍工艺于不同煅烧温度下(300~700℃)制备了二氧化钛/粉煤灰漂珠(简称Ti O_(2)/FACs)与二氧化钛/莫来石(简称Ti O_(2)/Mullite)复合材料,采用X射线衍射仪(XRD)、场发射扫描电子显微镜(SEM)、红外吸收光谱、紫外-可见分光光度计表征了材料的物相结构和光催化性能,研究了煅烧温度对Ti O_(2)/FACs与Ti O_(2)/Mullite复合材料物相结构和光催化性能的影响。结果表明:煅烧温度的高低对Ti O_(2)的形成产生重要影响,在400~600℃可获得单一的锐钛矿晶型,温度过高会产生金红石相,过低则不利于Ti O_(2)的形成;Ti O_(2)/FACs与Ti O_(2)/Mullite复合材料对罗丹明B染料的光催化降解效率随着煅烧温度的升高先上升后降低,经500℃煅烧制备的复合材料光催化性能最佳,锐钛矿型Ti O_(2)分别以纳米级的Ti O_(2)薄膜以及纳米级的颗粒负载于粉煤灰漂珠与莫来石晶体上;Ti O_(2)在粉煤灰漂珠与莫来石晶体上均属于物理吸附,并未形成相应的化学键。Ti O_(2)/FACs and Ti O_(2)/Mullite composites were prepared by sol-impregnation process at different calcination temperatures (300~700℃).The phase structure and photocatalytic properties of the composites were characterized by X-ray diffraction (XRD),field emission scanning electron microscopy (SEM),infrared absorption spectrum and UV-visible spectrophotometer.The effect of calcination temperature on the phase structure and photocatalytic properties of Ti O_(2)/FACs and Ti O_(2)/Mullite composites were studied.The results showed that the calcination temperature had an important influence on the formation of Ti O_(2).The single anatase crystal can be obtained at 400~600℃,and the rutile phase can be produced at a higher temperature,while the formation of Ti O_(2) was not favorable at a lower temperature.The photocatalytic degradation efficiency of Ti O_(2)/FACs and Ti O_(2)/Mullite composites for the degradation of rhodamine B dyes firstly increased and then decreased with the increase of calcination temperature,and the photocatalytic performance of the composites prepared by calcination at 500℃was the best.Anatase Ti O_(2) was supported on fly ash hollow spheres and mullite crystals with nano Ti O_(2) thin film and nano particles,respectively.Ti O_(2) was physically adsorbed on fly ash hollow spheres and mullite crystals without forming corresponding chemical bonds.

关 键 词：煅烧温度 莫来石 粉煤灰漂珠 物相结构 光催化性能 

分 类 号：TQ174.758[化学工程—陶瓷工业]