【摘要】 以Na2WO4和C12H25NH3.Cl作原料,通过液相沉淀法制备了WO3纳米粉体,再用钛酸胶体浸滞法制备了TiO2包覆的WO3纳米粉体,并采用透射电子显微镜、紫外-可见漫反射吸收光谱和X-射线衍射对其结构进行了表征.实验结果表明,TiO2包覆使WO3的光响应范围扩大,吸附量增大,显著提高了WO3对可溶性染料罗丹明B的光催化降解活性和光稳定性.更多还原

【Abstract】 Columnar WO3 nanoparticles have been prepared from Na2WO4 and C12H25NH3.Cl via a liquid precipitation process,and TiO2-coated WO3 nanoparticles were synthesized by solvent impregnating method with TiO2 colloid.The obtained samples were characterized by X-ray diffraction,transmission electron microscopy,the UV-vis diffuse reflectance spectrum.Moreover,the samples were employed for degradation of Rhodamine B in aqueous suspension.The results showed that TiO2 coating enhanced the photocatalytic activity and photostability of WO3 for Rhodamine B degradation.更多还原