摘要
为了改善纳米TiO2的分散性能和细化其颗粒尺寸,采用超声波强化均匀沉淀法制备纳米TiO2.首先以工业级硫酸氧钛为原料,用均匀沉淀法制备纳米TiO2,通过对比试验来反映超声波对于制备纳米TiO2的影响.然后采用BET比表面积与孔隙度分析、扫描电子显微镜、透射电子显微镜、X射线衍射分析研究了超声波的强化作用.试验结果表明:超声波的强化作用具有明显的细化颗粒尺寸的作用;能增加纳米TiO2的比表面积、孔容积与孔径;能改善分散度,使颗粒粒径分布范围变窄.通过均匀沉淀过程能直接获得纯锐钛型纳米TiO2,而无需经过特定温度的煅烧定型,超声波作用对产物晶型无影响.
In order to improve the dispersion of nano-TiO2 and to reduce the particle size,nano-TiO2 were synthesized by homogeneous precipitation intensified with ultrasound.Industrial grade TiOSO4 was used as raw material to synthesize nano-TiO2 by homogeneous precipitation.The effect of ultrasound on the fabrication of nano-TiO2 was studied by comparison tests.The characterization of nano-TiO2 was investigated by the BET surface area and porosity analysis,scanning electron microscope,transmission electron microscope,and X-ray diffraction analysis.The results show that the role of ultrasound can reduce the particle size significantly.Also it can increase the surface area,pore volume and pore size of nano-TiO2,and improve the dispersion properties and particle size distribution.Anatase nano-TiO2 can be obtained directly by the homogeneous precipitation process without specific calcine steps.And ultrasonic treatment does not change anatase crystal of the nano-TiO2 samples.
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2012年第4期680-684,共5页
Journal of Southeast University：Natural Science Edition
基金
国家高技术研究发展计划(863计划)资助项目(2008AA05Z303)
江苏省科技支撑计划资助项目(BE2010184)
江苏省环保科研课题资助项目(201031)
关键词
SCR催化剂
超声波
均匀沉淀
纳米TIO2
selective catalytic reduction（SCR） catalyst
ultrasound
homogeneous precipitation
nano-TiO2
