水热法在钛箔上制备多孔 TiO2 薄膜及其对乙基紫染料的光催化性能和机制。
Fabrication of porous TiO2 film on Ti foil by hydrothermal process and its photocatalytic efficiency and mechanisms with ethyl violet dye.
机构信息
Department of Biochemistry, School of Medicine, Taipei Medical University, Taipei 110, Taiwan, ROC.
出版信息
J Hazard Mater. 2010 May 15;177(1-3):864-75. doi: 10.1016/j.jhazmat.2009.12.113. Epub 2010 Jan 7.
Most of commercial dyes and pigments have rather complicated polyaromatic chemical structures with prolonged lifetime surviving in the Mother Nature. However, TiO(2) has been reported as one of the best photocatalytic candidates for degrading dye pollutants. In this report, TiO(2) film/Ti foil was prepared by hydrothermal reaction in alkali solution, the porous TiO(2) film with microcrystalline structure has been obtained. The porous structure of TiO(2) film was analyzed and characterized by XRD, FE-SEM and XPS. This is the first report that demonstrates that TiO(2) film/Ti foil has an excellent commercial application potential for photocatalytic degradation of Ethyl Violet (EV). Especially, because of refluxing at 100 degrees C, the porous TiO(2) film structure remained undisturbed, and EV decomposed in the period of 20 h. In addition, porous TiO(2)-mediated EV photo degradation mechanism has been proposed, as intermediates are isolated and clearly identified by GC-MS and HPLC-PDA-ESI-MS.
大多数商用染料和颜料都具有相当复杂的多环化学结构，在大自然中寿命很长。然而，TiO(2)已被报道为降解染料污染物的最佳光催化候选物之一。在本报告中，通过在碱性溶液中的水热反应制备了 TiO(2)薄膜/Ti 箔，得到了具有微结晶结构的多孔 TiO(2)薄膜。通过 XRD、FE-SEM 和 XPS 对多孔 TiO(2)薄膜的结构进行了分析和表征。这是首次报道 TiO(2)薄膜/Ti 箔在光催化降解乙基紫（EV）方面具有优异的商业应用潜力。特别是，由于在 100°C 回流，多孔 TiO(2)薄膜结构保持完整，EV 在 20 h 内分解。此外，提出了多孔 TiO(2)介导的 EV 光降解机制，通过 GC-MS 和 HPLC-PDA-ESI-MS 对中间体进行了分离和明确的鉴定。
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