摘要
以钛酸丁酯(TBT)为前驱体,在超声低温条件下,在棉织物表面原位生成纳米级锐钛矿型TiO2,并对其光催化性能进行了研究。通过均匀试验设计,以在紫外光和可见光辐射下亚甲基蓝脱色率为评价目标值,对钛酸丁酯、冰乙酸及超声时间三个因素进行回归分析,得出优化工艺:钛酸丁酯4 m L,超声2.5 h,紫外光下脱色率为85.94%;钛酸丁酯4 m L,超声5.5 h,可见光下脱色率为76.58%。并对比了超声及常规水热法处理后负载TiO2织物的光催化性能。X射线衍射(XRD)分析可知,溶液中残留的TiO2粉体主要为锐钛矿型,粒径5.3 nm;扫描电镜(SEM)观察发现,棉织物表面不均匀分布大量纳米级TiO2颗粒;紫外-可见光谱(UV-VIS)测试显示,负载TiO2的织物在紫外光区有明显吸收,可见光区吸收平台上移,超声及水热处理时间的延长有利于增强织物对紫外和可见光的吸收。
Nano-TiO2 with anatase crystalline phase is in-situ formed on cotton fabric using tetrabutyl tita- nate（TBT） as a precursor at low temperature and ultrasonic conditions, and its photocatalytic perfor- mance to Methylene Blue （MB） is discussed. With MB photo-decolorization rate as an evaluation value, the concentrations of TBT and acetic acid and sonication time are investigated, and the optimum process conditions are obtained by the uniform design and regression analysis as： decolorization rate of MB is 85.94% under UV radiation with TBT 4 mL and sonication time 2.5 h; and decolorization rate of MB is 76.58% under visible-light with TBT 4 mL and sonication time 5.5 h. The photocatalytic performance of nano-TiO2 loaded cotton fabric with ultrasonic and conventional hydrothermal method is compared. X- ray diffraction （XRD） analysis demonstrates that the residual TiO2 powder in the solution is mainly anatase phase with particle size of 5.3 nm; the scanning electron microscopy （SEM） images show that the surface of cotton fabric covered with a large number of uneven nano particals; UV-visible spectroscopy （UV-VlS） shows that TiO2 loaded fabrics have significant absorption in the UV region, and its absorption in visible light shows redshift. Extending ultrasound and hydrothermal time is conducive to improve the UV-visible light absorption of the treated fabric.
出处
《印染》
北大核心
2015年第11期10-13,共4页
China Dyeing and Finishing
关键词
功能性整理
原位
二氧化钛
光催化
棉织物
钛酸丁酯
超声
functional finish
in-situ
titanium dioxide
photo catalysis
cotton fabric
tetrabutyl titanate
ultrasonic
