在碳纳米管悬浮夜中,通过Zn(NO3)2与Na2S反应制备了硫化锌/碳纳米管复合物.研究发现:回流后处理以及合适的加料顺序,对强化硫化锌纳米晶体和碳纳米管的结合非常重要.亚甲基蓝水溶液的光降解试验显示:碳纳米管可有效提高硫化锌纳米晶体的光催化活性.原因是碳纳米管与硫化锌纳米晶体的紧密结合改善了电子迁移的界面,促使硫化锌激发电子快速向碳纳米管迁移,从而抑制了激发电子与空穴的复合.
Carbon nanotubes with attached ZnS nanocrystals were prepared by a reaction between Zn (NO3)2and Na2S in an aqueous suspension of carbon nanotubes. Post-refluxing treatment and the order in which the reactants were intro-duced played a crucial role in the improvement of the interaction between ZnS nanocrystals and carbon nanotubes. Stu-dies on methylene blue degradation revealed that carbon nanotubes could effectively increase the photocatalytic activity of the ZnS nanocrystals. Close contact between carbon nanotubes and the ZnS improved the interracial electron transfer and restrained the electron/hole (e-/h+) pair recombination of ZnS.
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