CeO2/TiO2光催化剂的制备及其可见光脱氮性能

Preparation and Visible Light Denitrification Performance of CeO_2/TiO_2 Photocatalyst

采用溶胶-凝胶和浸渍掺杂两步法合成了Ce O2/Ti O2光催化剂,并对催化剂的理化结构进行表征分析;以吡啶-正辛烷体系为模拟油品氮源,研究了该催化剂在可见光作用下的光催化脱氮行为,并探究了光催化脱氮的最佳反应条件。结果表明,掺杂的铈主要以Ce O2的形式存在,且增强了催化剂在可见光区的吸收;在可见光辐照150 min的条件下,铈的掺杂量质量分数为8%,所制备的Ce O2/Ti O2催化剂投入量为1.0 g/L时,模拟油品中吡啶的脱氮率高达76.45%。

CeO2/TiO2 photocatalyst was synthesized by sol-gel processing and dip-doping technique. Its physicochemical structure and properties were characterized. With pyridine n-octane system as the nitrogen source of simulative oil, the denitrification behavior of this photocatalyst under visible light was studied. The optimal photocatalysis reaction conditions were also explored. The doped cerium component in CeO2 enhances the adsorption of catalyst in the visible light region. When the illumination time is 150 min under visible light, the amount of cerium doped is 8%, the dosage of the CeO2/TiO2 photocatalyst is 1.0 g/L, the denitrification percent of pyridine in the simulative oil reaches up to 76.45%.