以乙二醇为电子给体在CuO／TiO2上光催化分解水制氢  

Photocatalytic Water Splitting for Hydrogen Evolution over CuO/TiO_2 with Ethylene Glycol as Electron Donor

作　　者：杨旭[1] 李小龙[1] 胡彩花 沙作良[1] 杨立斌[1] 

机构地区：[1]天津科技大学海洋科学与工程学院,天津市海洋资源与化学重点实验室,天津300457 [2]国家纳米技术与工程研究院,天津300457

出　　处：《无机化学学报》2015年第11期2167-2173,共7页Chinese Journal of Inorganic Chemistry

基　　金：国家国际科技合作专项项目(No.2013DFG52490);天津市应用基础与前沿技术研究计划重点项目(No.14JCZDJC40900)资助

摘　　要：采用浸渍、热分解的方法在TiO2纳米颗粒上负载CuO制备得到光催化剂CuO/TiO2。研究了以乙二醇为电子给体,在CuO/TiO2上光催化分解水制氢的反应过程。重点分析考察了影响光催化产氢速率的因素如CuO的负载量、反应时间、光催化剂用量、乙二醇初始浓度等,同时对光催化制氢的反应机理进行了初步探讨。结果表明,氙灯光源模拟太阳光下最佳产氢速率达到604.5μmol·h-1·g-1;CuO/TiO2催化剂改善了光吸收性能、减少了光生载流子的复合速率,CuO可以起到传输电子的作用;乙二醇为电子给体很可能经过羟基乙醛进一步被氧化。Nanosized TiO2 with deposited CuO （CuO/TiO2） photocatalysts were synthesized by impregnation and thermal decomposition method. The photocatalytic water splitting for hydrogen evolution was investigated over CuO/TiO2 with ethylene glycol as an electron donor. The effect of CuO loading, irradiation time, photocatalyst amount, initial concentration of the ethylene glycol solution on the reaction rate of photocatalytic hydrogen evolution was studied. The possible reaction mechanism hydrogen evolution rate reachs 604.5 μmol·h-1·g-1 was also discussed. The results show that the optimal under irradiation of 300 W Xe lamp. The CuO/TiO2 photocatalyst possesses enhanced optical absorption property, which can help to reduce the electron-hole recombination because the photo-generated electrons in TiO2 can be readily transferred to CuO. We suggest that ethylene glycol as electron donor may be further oxidized via glycolic acid.

关 键 词：光催化 分解水 制氢 乙二醇 CuO/TiO2 

分 类 号：O643.3[理学—物理化学] O643.36[理学—化学]