Wang Qifeng, Zhang Ling, Qiu Lingying, Sun Junqi, Shen Jiacong
Key Lab of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, People's Republic of China.
Langmuir. 2007 May 22;23(11):6084-90. doi: 10.1021/la700239r. Epub 2007 Apr 18.
Composite films of titanium phosphate (TiPS)/Prussian blue (PB) were fabricated by the alternative deposition of TiPS layer and PB nanocrystals. The layer of TiPS was fabricated by adsorption of hydrated titanium from aqueous Ti(SO4)2 solution and subsequent reaction with phosphate groups. The layer of PB nanocrystals was fabricated by sequential adsorption of FeCl3 solution and K4[Fe(CN)6] solution. Regular deposition of TiPS/PB composite films were verified by UV-vis absorption spectroscopy and quartz crystal microbalance measurements. The successful fabrication of the TiPS/PB composite films was further confirmed by X-ray photoelectron spectroscopy and Fourier transform infrared (FT-IR) spectroscopy. Instead of producing films of TiPS layers alternating with PB nanocrystal layers, the TiPS/PB composite films have a structure in which the interstices of the PB nanocrystal films are filled with TiPS component. TiPS/PB composite films show enhanced electrochemical properties and improved stability in comparison with pure PB films prepared by the multiple sequential adsorption process. TiPS/PB composite films have the capability to catalyze the electrochemical reduction of H2O2 and can be used as a biosensor for detecting H2O2.
通过交替沉积磷酸钛（TiPS）层和普鲁士蓝（PB）纳米晶体来制备磷酸钛（TiPS）/普鲁士蓝（PB）复合膜。TiPS层是通过从Ti(SO4)2水溶液中吸附水合钛并随后与磷酸基团反应制备的。PB纳米晶体层是通过依次吸附FeCl3溶液和K4[Fe(CN)6]溶液制备的。通过紫外可见吸收光谱和石英晶体微天平测量验证了TiPS/PB复合膜的规则沉积。通过X射线光电子能谱和傅里叶变换红外（FT-IR）光谱进一步证实了TiPS/PB复合膜的成功制备。TiPS/PB复合膜并非是由TiPS层与PB纳米晶体层交替形成的膜，而是具有一种结构，其中PB纳米晶体膜的间隙被TiPS组分填充。与通过多次顺序吸附过程制备的纯PB膜相比，TiPS/PB复合膜表现出增强的电化学性能和更高的稳定性。TiPS/PB复合膜具有催化H2O2电化学还原的能力，可作为检测H2O2的生物传感器。
