纤维素物质纳米级复制中的原子层沉积及光催化TiO2/纤维素复合材料的制备。
Atomic layer deposition in nanometer-level replication of cellulosic substances and preparation of photocatalytic TiO2/cellulose composites.
作者信息
Kemell Marianna, Pore Viljami, Ritala Mikko, Leskelä Markku, Lindén Mika
机构信息
Laboratory of Inorganic Chemistry, Department of Chemistry, FI-00014 University of Helsinki, Finland.
出版信息
J Am Chem Soc. 2005 Oct 19;127(41):14178-9. doi: 10.1021/ja0532887.
TiO2 replicas of filter paper with nanometer-level accuracy were prepared by atomic layer deposition of thin conformal TiO2 coating, followed by a removal of the paper by air-anneal at 450 degrees C. Photocatalytic anatase TiO2/cellulose composites were also made by leaving the paper intact. The TiO2 films were deposited from Ti(OMe)4 and H2O at 150-250 degrees C. The photocatalytic activity of the TiO2/cellulose composite was verified by photocatalytic reduction of Ag(I) from an aqueous solution to Ag nanoparticles on the TiO2 surface. The TiO2/cellulose composites are mechanically more stable than the free-standing TiO2 replicas and are therefore potentially suitable as lightweight, high surface area photocatalysts.
通过原子层沉积薄的 conformal TiO₂ 涂层制备具有纳米级精度的滤纸 TiO₂ 复制品，随后在 450℃ 下通过空气退火去除纸张。通过使纸张保持完整也制备了光催化锐钛矿 TiO₂/纤维素复合材料。TiO₂ 薄膜在 150 - 250℃ 下由 Ti(OMe)₄ 和 H₂O 沉积。通过将水溶液中的 Ag(I) 光催化还原为 TiO₂ 表面的 Ag 纳米颗粒，验证了 TiO₂/纤维素复合材料的光催化活性。TiO₂/纤维素复合材料在机械上比独立的 TiO₂ 复制品更稳定，因此有可能适合作为轻质、高表面积的光催化剂。
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