以钨粉（W）和双氧水（H₂O₂）为原料，通过液相合成法制备前驱体粉末后，采用刮刀涂布工艺制备了具有高光电化学（PEC）水氧化效率的WO₃光阳极。并利用X射线衍射、拉曼光谱分析并结合热分析法研究煅烧温度对纳米WO₃的晶型和晶粒直径的影响。结果表明，煅烧温度为400℃时可制备单斜相WO₃，且WO₃的晶粒直径随温度升高而增大。扫描电镜分析结果表明，制备的WO₃颗粒尺寸约为20~70 nm。环伏安测试结果表明，WO₃-600光阳极的光电流达到1.88 mA/cm²，是WO₃-400的2.65倍。入射光子-电流转换效率（IPCE）说明WO₃光阳极的起始波长为470 nm。Co²⁺的添加大幅提升了PEC分解水的催化活性和稳定性。

Tungsten oxide (WO₃) photoanode for highly efficient photoelectrochemical (PEC) oxidation of water is prepared by a facile and simple doctor-blading technique utilizing a precursor that is synthesized from tungsten powder and hydrogen peroxide (H₂O₂) via liquid phase synthesis method.XRD,Raman and thermal analysis instruments of TG-DTA are used to investigate the effect of calcination temperature on crystal structure and crystallite diameter of the nano-WO₃.It is found that monoclinic WO₃ crystals can be obtained from the precursor via calcination above 400^oC,and the crystallite diameter of nano-WO₃ increases with the increasing calcination temperature.SEM images prove that WO₃ particles have a diameter between 20 nm and 70 nm.Cyclic voltammetry results indicate WO₃-600 photoanode can generate a photoanodic current density of 1.88 mA·cm^-2 at 1.0 V versus Ag/AgCl under visible light irradiation,which is about 2.65 times that of WO₃-400.IPCE results show WO₃-600 photoanode starts to generate photocurrent on illumination of visible light below 470 nm.The photoanodic current and photostability of WO₃ photoanode are improved due to addition of Co²⁺ ions in the electrolyte solution during PEC decomposition of water.