(中南大學(xué) 化學(xué)化工學(xué)院，長沙 410083)
摘 要: 采用低溫固相反應(yīng)法制備低含量Pr3+(0.05%，質(zhì)量分?jǐn)?shù))摻雜的WO3催化材料，采用XRD、XPS和DRS對(duì)樣品進(jìn)行表征和分析，考察催化劑在電子接受體Fe3+溶液體系下的光催化分解水制氧活性。結(jié)果表明，0.05% Pr3+摻雜可以使WO3樣品的光譜響應(yīng)范圍向可見光區(qū)拓展。XPS分析表明，Pr3+摻雜可以導(dǎo)致催化劑樣品表面氧缺位增加。在可見光輻射下光催化分解水制氧的實(shí)驗(yàn)中，0.05% Pr3+摻雜WO3樣品的光催化析氧速率高達(dá)196.64 μmol/(L∙h)，是未摻雜WO3的2倍
關(guān)鍵字: 鐠；三氧化鎢；光催化；分解水
（College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China）
Abstract:Low content Pr3+(0.05%, mass fraction) doped WO3 samples were prepared by solid state reaction at low temperature and characterized by XRD, XPS and DRS. The photocatalytic activity for oxygen evolution was investigated. The results show that 0.05% Pr3+ dopant can make the optic response range of WO3 catalysts expand to the visual light obviously. The analytical results of XPS indicate that Pr3+-doping can result in the increase of the density of surface oxygen vacancies of catalysts. In the experiment of water splitting to oxygen at the visible radiation, the rate for oxygen evolution of 0.05% Pr3+ doped WO3 is up to 196.64 μmol/(L∙h), which is two times of that of pure WO3
Key words: praseodymium; tungsten trioxide; photocatalytic; water splitting
