基于光催化性能的Cu-Ce/TiO_2湿性能

以Cu(NO_3)_2·3H_2O和Ce(NO_3)_3·6H_2O为改性剂,采用溶胶-凝胶法制备Cu-Ce/TiO_2。探讨Cu-Ce负载量、Cu与Ce摩尔比和煅烧温度对Cu-Ce/TiO_2性能的影响。利用SEM,LPSA,BET和UV-Vis测试Cu-Ce/TiO_2的表面形貌、粒度分布、孔结构和光学性能。结果表明:Cu-Ce负载量3%、Cu与Ce摩尔比1∶1、煅烧温度500℃时,制备的Cu-Ce/TiO_2具有良好的光催化性能与湿性能。Cu-Ce/TiO_2呈近似球体,具有较好的均匀化和分散性,其粒径分布为1202.98~5364.48nm,其中d50为2437.57nm。Cu-Ce/TiO_2具有狭小瓶颈的"墨水瓶"型孔结构,其比表面积为105.55m2/g,孔体积为0.1200~0.1246mL/g,平均孔直径为3.44~4.02nm。Cu-Ce掺杂促使Cu-Ce/TiO_2内部形成新的能级,提高捕获e-和h+的能力,增强光子的利用效率,促使吸收边带发生红移。

Cu-Ce/TiO2 Moisture Performance Based on Photocatalytic Performance

Cu(NO3)2 · 3H2O and Ce(NO3)3 · 6H2O were used as modifier to make Cu-Ce/TiO2 by solgel method.The influences of Cu-Ce loading capacity,Cu and Ce molar ratio,sintering temperature on Cu-Ce/TiO2 performance were explored.Then,surface morphology,particle size distribution,pore structure and optical property of Cu-Ce/TiO2 were characterized by SEM,LPSA,BET and UV-Vis,respectively.The results show that:prepared Cu-Ce/TiO2 shows good photocatalytic-moisture performance when Cu-Ce loading capacity is 3 ％,Cu and Ce molar ratio is 1:1 and sintering temperature is at 500℃.Cu-Ce/TiO2 presents approximate sphere,with better uniformity and dispersibility and the particle size distribution is 1202.98-5364.48nm,with d50 2437.57nm.Cu-Ce/TiO2 has pore structure,approximate to an "ink bottle" with a narrow bottleneck,with the specific surface area 105.55m2/g,hole size 0.1200-0.1246mL/g,and average pore diameter 3.44-4.02nm.Cu-Ce doping promotes to form a new energy level inside Cu-Ce/fiO2 so as to improve the ability to capture e and h+,enhance the efficiency of photon utilization,and promote red shift of absorption sideband.