冷却工艺、填充溶剂对钙钛氧化物的微观形貌及光催化性能的影响  

The Effect of Cooling Technology and Filling Solvent on the Microstructure and Photocatalytic Properties of Calcium Titanium Oxide

作　　者：程卫桃[1] 李济[1] 胡其国 CHENG Wei-tao;LI Ji;HU Qi-guo(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,景德镇333001

出　　处：《中国陶瓷》2024年第6期36-41,共6页China Ceramics

基　　金：江西省教育厅科技项目(GJJ2205607)。

摘　　要：以钛酸正丁酯和无水氯化钙为原料,采用水热法制备了不同显微形貌的钙钛氧化物粉体。研究了冷却工艺与填充剂种类对钙钛氧化相结构、显微形貌和光催化特性的影响。结果表明:当无外加填充溶剂引入,采用不同冷却工艺均可获得具有片状结构的CaTi_(2)O_(4)(OH)_(2)纯相;当分别引入20 mL乙醇或水作为填充溶剂时,制备的粉体相结构和微观形貌在不同的冷却工艺下存在较大差异,粉体的相结构和微观形貌经历了从无定型相的针网状形貌过渡到由纳米纤维聚积夹杂少量块状CaTiO_(3)物相组成的形貌,以及完全由具有片状结构的CaTi_(2)O_(4)(OH)_(2)物相过渡到具有片状结构的CaTi_(2)O_(4)(OH)_(2)以及少量方块状CaTiO_(3)组成的物相。光催化性能显示,引入20 mL乙醇作为填充溶剂,采用缓冷工艺制备的粉体在紫外可见光3 h下对罗丹明B的光催化效率最佳。Using TBOT and CaCl2 as raw materials,calcium titanium oxide powders with different microstructures were prepared via a hydrothermal method.The phase structure,microstructure,and photocatalytic properties of calcium titanium oxide were studied by using different cooling technology and filling solvent.The results showed that when no additional filling solvent was introduced,the CaTi_(2)O_(4)(OH)_(2)pure phase with sheet structure could be obtained by using different cooling technology.The phase structure and microstructure of the prepared powders differed greatly under different cooling technology,when 20 mL of ethanol or water was introduced as the filling solvent.The powder’s phase structure and microstructure transitioned from an amorphous needle-like morphology into a morphology composed of nanofiber aggregation with a small amount of blocky CaTiO_(3) phase,and completely transitioned from the CaTi_(2)O_(4)(OH)_(2)phase with sheet structure to the CaTi_(2)O_(4)(OH)_(2)phase with sheet structure and a small amount of blocky CaTiO_(3) phase.The photocatalytic performance showed that the powder prepared by slow cooling technology with 20 mL of ethanol as the filling solvent had the best photocatalytic efficiency for Rhodamine B under UV-visible light for 3 h.

关 键 词：钙钛氧化物 冷却工艺 溶剂组成 光催化性能 

分 类 号：TQ174.75[化学工程—陶瓷工业]