摘要
以Ti(SO4)2为前驱体,H2SO4或NaOH为pH调节剂,通过水热法合成了不同晶粒尺寸的锐钛矿相纳米TiO2,并研究了反应体系的pH值、反应时间和Ti(SO4)2浓度对TiO2晶粒尺寸的影响。结果表明,纳米TiO2的晶粒尺寸与反应时间近似成对数关系,Ti(SO4)2浓度与反应体系的pH值对纳米TiO2晶粒尺寸的影响有近似线性叠加关系。通过对pH值、反应温度和Ti(SO4)2浓度的调节,可实现纳米TiO2的可控合成。
Hydrothermal synthesis of anatase titania nano-powder is a widely used method in the chemical industry and the material sciences.The size of the nanomaterial is one of the significant concerns in related researches.Anatase titania with different sizes are synthesized from Ti（SO4）2 by adjusting the pH value,the reaction time and the precursor＇s concentrations.The results indicate that the size of nano-titania has an approximately logarithmic relation with the reaction time;the influence of Ti（SO4）2 concentration and pH value on the particle size is independent;the synthesis of anatase titania nano-powder with different sizes could be achieved by controlling the synthesis temperature,the precursor concentrations and the pH values.
出处
《北京大学学报（自然科学版）》
CAS
CSCD
北大核心
2010年第4期525-530,共6页
Acta Scientiarum Naturalium Universitatis Pekinensis
基金
国家自然科学基金(104901802,20471005,10775008)
高等学校博士学科点专项科研基金(20060001032)
国防科学技术工业委员会军工遗留专项基金(科工计[2007]840)
国家大学生创新训练计划资助
关键词
二氧化钛
水热法
可控合成
nano-titania
hydrothermal method
condition synthesis
