摘要
采用一步水热法合成了钛酸纳米材料,并以此为前驱体,通过二次水热处理制备了新型材料.使用XRD,TEM,N2吸附等温线等手段对催化剂进行了表征.结果表明,两种材料都为棒状纳米催化剂,其中二次水热材料为锐钛矿.光催化降解四环素结果表明两种催化剂都具有较高活性,二次水热纳米棒反应速率常数为一次水热材料的7倍;动力学实验表明TiO2纳米棒对四环素的光催化反应符合Langmuire-Hin-shelwood模型.
H-titanate nanowire was synthesized via one-step hydrothermal reaction,and new materials were obtained by hydrothermal post-treatments.The catalysts were characterized by XRD,TEM,N2adsorption.Results showed that the synthesized materials were rodshaped nanometerials.The material prepared using hydrothermal post-treatment consisted of pure anatase.Photocatalytic experiments demonstrated that these catalysts were highly active for tetracycline degradation.In addition,reaction rate constant with anatase nanorod was seven times higher than that with H-titanate nanowire.The photocatalytic degradation of tetracycline could be well described using Langmuire-Hinshelwood model.
出处
《环境化学》
CAS
CSCD
北大核心
2010年第3期476-480,共5页
Environmental Chemistry
基金
国家自然科学基金项目(20637030,20677026)
国家科技支撑计划项目(2006BAC02A15)资助
