C_(60)-TiO_2纳米复合材料的制备及其光催化产氢性能  

Preparation of C_(60)-TiO_2 nanocomposite and its photocatalytic hydrogen production performance

作　　者：戴珂[1,2] 张帅[1] 宋帅帅[1] 彭天右[1] 

机构地区：[1]武汉大学化学与分子科学学院,武汉430072 [2]华中农业大学资源与环境学院,武汉430070

出　　处：《中国科学：化学》2016年第5期478-486,共9页SCIENTIA SINICA Chimica

基　　金：国家自然科学基金(编号:21573166;21271146;20973128;20871096);湖北省创新群体(编号:2014CFA007)项目资助

摘　　要：采用表面功能化的C_（60）和Ti（SO_4）_2为起始原料水热制备了C_（60）-TiO_2纳米复合材料.在水热反应过程中功能化C_（60）分子在原位生长的锐钛矿TiO_2纳米粒子表面通过Ti–O–C化学键连作用形成表面配合物,并能抑制TiO_2晶粒的长大.合成的C_（60）-TiO_2纳米复合材料具有比单纯的TiO_2更宽的光谱响应范围、更优的光催化产氢性能和化学稳定性,其在350~550 nm波长范围内均具有光催化产氢活性,且在420和475 nm处的产氢表观量子产率分别为4.2%和8.3%.C_（60）-TiO_2复合材料的可见光催化产氢性能可能归结于其表面配合物的配体-金属电荷转移（LMCT）敏化作用机制.C_（60）-TiO_2 nanocomposite was fabricated via a hydrothermal process by using surface functionalized C_（60） and Ti（SO4）2 as starting materials. The additional functionalized C_（60） molecules can form surface complexes on the in situ grown anatase TiO_2 nanoparticles through the Ti–O–C chemical bonding, and retarded the growth and the crystal phase transformation of TiO_2 grains during the hydrothermal reaction process. The resultant C_（60）-TiO_2 nanocomposite exhibited wider spectral responsive range, better photocatalytic H_2 production activity and chemical stability compared with TiO_2 alone, and has photocatalytic activity for H_2 production in the wavelength range of 350–550 nm with an apparent quantum yield of 4.2% and 8.3% at 420 and 475 nm monochromatic light irradiation, respectively. The visible-light-responsive activity for H_2 production over the present C_（60）-TiO_2 nanocomposite can be ascribed to the lignad-metal charge transfer sensitization mechanism of the surface complexes formed between the functionalized C_（60） molecules and TiO_2 nanoparticles.

关 键 词：纳米复合材料 富勒烯 电荷转移配合物 可见光响应 光催化产氢 

分 类 号：O643.36[理学—物理化学] TQ116.2[理学—化学]