混晶纳米TiO_2分散乳液的制备及其光催化性能  

Preparation and Characterization of Mix-crystal Nanometric TiO_2 Dispersion Emulsion

作　　者：张永芬[1] 赵菁[2] 丁士文[3] 王利勇[3] 

机构地区：[1]河北建材职业技术学院建筑材料系,河北秦皇岛066004 [2]石家庄职业技术学院化工系,河北石家庄050081 [3]河北大学化学与环境科学学院,河北保定071002

出　　处：《河北大学学报（自然科学版）》2008年第4期378-383,共6页Journal of Hebei University(Natural Science Edition)

基　　金：河北省自然科学基金重点资助项目(B2005000097)

摘　　要：以四氯化钛、氨水、表面活性剂op-10等简单易得的试剂为主要原料,采用常压液相、两步水解法制备出混晶纳米TiO2分散乳液;对乳液制备过程中的影响因素如pH值、酸性介质中的反应时间、表面活性剂量等进行了研究,并采用XRD、TEM、紫外-可见分光光度计等分析手段,对产品的物相、形貌、光吸收和光催化等性能进行了表征.结果表明:所制乳液为金红石-锐钛矿混晶结构,两相含量受酸性反应时间控制;TEM形貌分析,乳液分散性能良好,粒子基本为球形,粒径约为15 nm;应用实验发现体系pH值、表面活性剂的添加量等对乳液的光吸收及光催化性能有一定影响.Using TiCl4·NH3·H2O and surfactant op-10 as the raw materials, dispersion emulsion of mixcrystal nanometric TiO2 was obtained by two-stage hydrolyzed method in constant pressure; The effects of parameters such as pH, reaction time for acidity medium, the amount of surfactant op-10 were examined, taking acid red 3R as a specific for analysis. The products were characterized by XRD, TEM and UV-visible spectrophotometer. The results showed that the content of Ruffle in mix-crystal emulsion is determined by acid reaction time; TEM measurement indicated that the mix-crystal TiO2 is spherical particles, and the average diameter of particles is 15 nm or so. Applied experiment showed the quantity of pH and surfactant have some effect on light absorption and photocatalysis.

关 键 词：混晶 纳米TIO2 分散乳液 光催化 

分 类 号：O614.41[理学—无机化学] TQ034[理学—化学]