Tert-butyl alcohol (TBA) was used as a low dielectric constant solvent for the fabrication of TiO2 nanoparticles by electrostatic jet. The phase, morphology and diameter distribution properties of the resulting TiO2 nanoparticles were characterized by XRD and SEM, respectively. As the PVAc content of the precursor solutions increased, the diameter of the electrostatic jet PVAc/butyl titanate composite nanoparticles increased. The resulting composite nanoparticles possessed a smooth surface and displayed perfect spherical structures when the PVAc content was 3 wt%, where as a PVAc content of 9 wt% or more led to a co-continuous structure of nanoparticles and fibers, other were erythrocyte-liked in shape and contained large pits on their surface. Anatase TiO2 nanoparticles were formed from the butyl titanate/PVAc nanoparticles following their calcination at 550 °C. The diameter distribution of the TiO2 nanoparticles was wide, with the values falling in the range of 623.8 ± 122.8 to 1328.3 ± 247.6 nm. When its diameter is 238 nm and adding content is 2 g/L, the 40 min degradation rate of methylene blue catalyzed by titanium oxide nanoparticles is 92.39%.
采用
叔丁醇(TBA)作为低介电常数溶剂,通过静电喷射法制备
二氧化钛纳米粒子。XRD 和
SEM 分别对所制备的 TiO2 纳米粒子的相貌、形态和直径分布特性进行了表征。随着前驱体溶液中 PVAc 含量的增加,静电喷射 PVAc/
钛酸丁酯复合纳米粒子的直径增大。当 PVAc 含量为 3 wt% 时,生成的复合纳米粒子表面光滑,呈完美的球形结构;当 PVAc 含量为 9 wt% 或更高时,纳米粒子和纤维呈共连续结构,其他纳米粒子呈红细胞状,表面有大坑。
钛酸丁酯/PVAc 纳米粒子在 550 ℃ 煅烧后形成了
钛酸钛酸酯纳米粒子。
二氧化钛纳米粒子的直径分布范围很广,在 623.8 ± 122.8 至 1328.3 ± 247.6 nm 之间。当直径为 238 nm,添加量为 2 g/L 时,纳米氧化
钛催化
亚甲基蓝 40 分钟的降解率为 92.39%。