C-TiO_2光催化还原CO_2的实验研究  

Test of Photocatalytic Reduction of Carbon Dioxide by C-TiO_2

作　　者：薛丽梅[1,2] 张风华[2] 樊惠娟[3] 陈彬[2] 白雪峰[1,3] 

机构地区：[1]哈尔滨工程大学材料与化工学院,黑龙江哈尔滨150001 [2]黑龙江科技学院资源与环境学院,黑龙江哈尔滨150027 [3]黑龙江省石油化学研究院,黑龙江哈尔滨150040

出　　处：《矿冶工程》2011年第1期84-87,共4页Mining and Metallurgical Engineering

摘　　要：采用浸渍-焙烧法制备了C掺杂TiO2纳米粉体,并对所制备的光催化剂进行了表征。结果表明,C取代了TiO2晶格中的Ti原子,形成了Ti—O—C的结构;掺杂C后,晶型未发生变化,电荷分离效率提高,TiO2的吸收边发生红移。碳掺杂TiO2降低了TiO2的禁带宽度,拓展了可见光吸收区域。在模拟日光灯照射下,选取可见光吸收最好的催化剂C-TiO2-3/1-600进行了光催化还原CO2制取甲酸的研究,光照6 h,甲酸产量达到2 633.98μmol/g-Cat。C-doped TiO2 nanopowder was obtained by impregnation-calcination method.The prepared photocatalyst was characterized.The results showed that C substituted Ti atoms in the lattice of TiO2 and formed Ti—O—C structure.C-doping resulted in no change in the crystal shape but enhancement of the charge separation efficiency and red shift at TiO2 absorption edge.The doped carbon lowered the band gap and expanded the absorption region of visible light.CO2 was photocatalytically reduced by C-TiO2-3/1-600 nanoparticles with the best visible light absorption to form HCOOH under simulated fluorescent light.Methanoic acid yield may reach to 2 633.98 μmol/g-Cat when the light irradiation time is 6 hours.

关 键 词：碳掺杂 TIO2 光催化 还原 二氧化碳 

分 类 号：TQ116.3[化学工程—无机化工] O643.36[理学—物理化学]