Fabrication and Electrochemical Investigation of Layer-by-Layer Deposited Titanium Phosphate/Prussian Blue Composite Films

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• 作者：Qifeng Wang ; Ling Zhang ; Lingying Qiu ; Junqi Sun ; Jiacong Shen
• 刊名：Langmuir
• 出版年：2007
• 出版时间：May 22, 2007
• 年：2007
• 卷：23
• 期：11
• 页码：6084 - 6090
• 全文大小：271K
• 年卷期：v.23,no.11(May 22, 2007)
• ISSN：1520-5827

文摘

Composite films of titanium phosphate (TiPS)/Prussian blue (PB) were fabricated by the alternative deposition ofTiPS layer and PB nanocrystals. The layer of TiPS was fabricated by adsorption of hydrated titanium from aqueousTi(SO₄)₂ solution and subsequent reaction with phosphate groups. The layer of PB nanocrystals was fabricated bysequential adsorption of FeCl₃ solution and K₄[Fe(CN)₆] solution. Regular deposition of TiPS/PB composite filmswere verified by UV-vis absorption spectroscopy and quartz crystal microbalance measurements. The successfulfabrication of the TiPS/PB composite films was further confirmed by X-ray photoelectron spectroscopy and Fouriertransform infrared (FT-IR) spectroscopy. Instead of producing films of TiPS layers alternating with PB nanocrystallayers, the TiPS/PB composite films have a structure in which the interstices of the PB nanocrystal films are filledwith TiPS component. TiPS/PB composite films show enhanced electrochemical properties and improved stabilityin comparison with pure PB films prepared by the multiple sequential adsorption process. TiPS/PB composite filmshave the capability to catalyze the electrochemical reduction of H₂O₂ and can be used as a biosensor for detectingH₂O₂.