申乾宏
,
蔡振钱
,
高基伟
,
杨辉
催化学报
采用具有锐钛矿晶粒的TiO2溶胶与聚苯乙烯球形粒子混合制得涂膜液,通过浸渍提拉法制备薄膜,然后在超声波振荡条件下,以甲苯为溶剂,将薄膜中的聚苯乙烯球选择性地溶解去除,在室温下获得了锐钛矿型多孔TiO2薄膜. 与致密的TiO2薄膜相比,该多孔TiO2薄膜具有较高的光催化活性. 该方法有以下两方面的优点: 一是实现了多孔TiO2薄膜的室温制备,增大了薄膜基材的选择范围;二是可以通过添加不同粒径的聚苯乙烯球,较为方便地实现了对薄膜孔径的调节.
关键词:
二氧化钛薄膜
,
多孔性
,
聚苯乙烯球
,
罗丹明B
,
光催化分解
Han Chen Kui Cheng Zhicheng Wang Wenjian Weng Ge Shen Piyi Du Gaorong Han
材料科学技术（英文）
Porous NiO-Ce0.8Sm0.2O1.9 (NiO-SDC) ceramics with homogeneous pore distribution were prepared using polystyrene (PS) spheres as pore templates. NiO-SDC powders were synthesized by a glycine-nitrate method, ultrasonically mixed with PS spheres in ethanol, dried and then pressed into green pellets. The pellets were sintered to yield porous NiO-SDC ceramics. The effects of the sintering temperature on the microstructure and mechanical strength of the ceramics were investigated. NiO-SDC ceramics sintered at 1200 and 1350°C have interconnected pore structures and high compression strength. When single cells were fabricated using porous NiO-SDC ceramics as anode-supported layers, the peak power density of the cells at 600°C was 333 and 353 mW·cm-2 for ceramics sintered at 1200 and 1350°C, respectively. The results indicated that these porous ceramic materials are promising for anode substrates for solid oxide fuel cells.
关键词:
Porous ceramic
,
NiO-SDC
,
聚苯乙烯球
,
微观结构
,
阳极支撑固体氧化物燃料电池
