Hydrogen Bonding Assisted Formation Of Sandwich-Type Titanium-Containing Heteropolymolybdates: Water-Soluble And Photoelectroactive

Titanium-substituted polyoxometalates related with the semiconductor TiO(2)have potential applications in photocatalytic, photovoltaic and semiconducting materials. In this work, we synthesize two water-soluble titanium-containing polyoxomolybdates (NH4)(8)[(CH3)(4)N](2)[Ti-2(SbMo7O27)(2)]center dot 15H(2)O (1) and (NH4)(10)[Ti-2(AsMo7O27)(2)]center dot 16H(2)O (2) by a conventional aqueous solution method. Ammonia water as a starting material could play dual roles of a pH adjustor and a hydrogen bond assistant, resulting in the formation of many strong hydrogen bonds in their crystal structures. The electrochemical properties of compounds1and2were investigated by cyclic voltammogram measurements, and the diffuse reflectance UV-vis spectra of1and2were recorded to calculate their semiconductor band gap (E-g) values. Furthermore, using the two compounds as semiconducting materials, we carried out the photoelectrochemical sensing of bisphenol A in aqueous solution, indicating that bisphenol A in aqueous solution could be detected by means of photocurrent change.