Synthesis and property of HNbWO6/Pt layered nanocomposite photocatalyst

HNbWO6 was prepared by calcining stoichiometric mixture of Li2CO3, WO3 and Nb2O5 followed by ion exchange reaction with HNO3. HNbWO6/Pt layered nanoco mposite photocatalyst was synthesized by successive reaction of HNbWO6 with n-PrNH2 and [Pt(NH3)(4)]Cl-2 under U-V light irradiation. The influence of different preparation methods on property,of HNbWO6/Pt was compared. The r esults of XRD, DRS (diffuse reflectance spectrum), ICP(inductivity coupled plasma) and specific surface area measuremtents for the samples indicated t hat, for HNbWO6/Pt, the gallery height was 0. 3 similar to 0. 5 nm, the ban d gap energy was 2. 25 similar to 3. 10 eV. Under irradiation with lambda > 290 nm from a Hg lamp of 450 W for 5 h, about 40 ml of hydrogen was produc ed from 1250 ml of methanol solution(10 %) containing 1 g of dispersed HNbW O6/Pt.