金属离子掺杂纳米TiO2(M-TiO2, M = Zn2+, Cu2+, Co2+, Mn2+, Ni2+)在CO2与环氧化合物的偶联反应中表现出较高的催化活性。反应以四正丁基碘化铵(TBAI)为共催化剂,在无溶剂条件下进行。考察了反应温度、反应时间和CO2压力在Zn-TiO2/TBAI体系中对反应性能的影响。作为无毒的多相催化剂, Zn-TiO2可循环使用5次,其催化活性没有明显降低。
TiO2 doped with metal ions (M-TiO2, M=Zn2+, Cu2+, Co2+, Mn2+, or Ni2+) was investigated as a heter-ogeneous catalyst for the coupling reaction of CO2 and epoxides, using tetrabutylammonium iodide (TBAI) as a co-catalyst under solvent-free conditions. These compounds were found to exhibit high catalytic activities. The effects of reaction temperature, reaction time, and CO2 pressure on the effec-tiveness of a Zn-TiO2/TBAI catalyst system were also examined. Zn-TiO2 represents a nontoxic, heterogeneous catalyst that can be reutilized up to five times without a significant loss of catalytic activity.
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