最小粒径钒/铁共掺杂纳米TiO_2透明光触媒乳液的制备及其光催化性能

Minimum particle diameter of the vanadium/iron co-doped nano-TiO_2 transparent hydrosol at room temperature

采用常温络合-控制水解法,以TiCl_4、硝酸铁、偏钒酸铵等为主要实验原料,制备出了平均粒径为3.8nm的钒/铁共掺杂纳米TiO_2透明光触媒乳液.对样品的组成、物相、粒径、光吸收、光催化等性质,通过XRD、EDS、纳米激光粒度分析仪、紫外-可见分光光度计等设备来进行表征.采用酸性红3R染料为实验降解材料,研究了钒/铁共掺杂纳米TiO_2光触媒的光催化特性.结果表明,样品乳液的光催化性能在回流时间是15min,pH值是6,钒/铁掺杂量的比例是0.5%时达到最好.将加入相同酸性红3R染料溶液的样品乳液,在太阳光照持续60min的条件下,降解率最高能够达到96%以上.

Vanadium/iron co-doped nano TiO_2 transparent hydrosol with an average particle size of3.8nm was synthesized by a novel complexation-controlled hydrolysis method at room temperature and atmospheric pressure by using TiCl_4,ferric nitrate,ammonium metavanadate,etc.as raw materials.The composition,phase structure,particle size,absorbance spectrum,and photocatalytic performance of sam-ples were characterized by XRD,EDS,nano laser particle size analyzer,and UV-Vis spectrophotometer.The photocatalytic properties of V/Fe doped TiO_2 were studied through degrading acid 3Rdye,and the results showed that when the content of V/Fe was 0.5%,the degradation rate reached more than 96% under irridation for 60 min.