Chowdhury Devasish, Paul Anumita, Chattopadhyay Arun
Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781 039 India.
Langmuir. 2005 Apr 26;21(9):4123-8. doi: 10.1021/la0475425.
Herein, we report a new method of generation of TiO(2) nanoparticles (NPs) incorporated thin films of polypyrrole (PPy) at the air-water interface. Aqueous TiO(2) NPs when treated with H(2)O(2) and left in a chamber of pyrrole vapor resulted in the formation of a film at the interface, in addition to bulk precipitate. Spectroscopic, X-ray diffraction, and electron microscopic measurements establish the formation of a thin film of PPy with the incorporation of TiO(2) NPs. The TiO(2)-containing PPy films when transferred onto glass substrates were able to photo catalyze the decomposition of aqueous organic dyes: methyl orange and methylene blue. Further, these films could also photo catalyze the oxidation of iodide to triiodide ions in aqueous potassium iodide solution. We find that the PPy-TiO(2) composite films catalyze the reactions in the presence of light more efficiently than a suspension of TiO(2) NPs.
在此，我们报告了一种在气-水界面生成掺入二氧化钛（TiO₂）纳米颗粒（NPs）的聚吡咯（PPy）薄膜的新方法。当用H₂O₂处理水性TiO₂ NPs并将其置于吡咯蒸气室中时，除了大量沉淀外，还会在界面处形成薄膜。光谱、X射线衍射和电子显微镜测量证实了掺入TiO₂ NPs的PPy薄膜的形成。当将含TiO₂的PPy薄膜转移到玻璃基板上时，它们能够光催化分解水性有机染料：甲基橙和亚甲基蓝。此外，这些薄膜还能在碘化钾水溶液中将碘化物光催化氧化为三碘离子。我们发现，PPy-TiO₂复合薄膜在光存在下催化反应的效率比TiO₂ NPs悬浮液更高。
