【摘要】 将纳米TiO2粉体分散在钛酸四丁酯中制成纳米TiO2胶体溶液,在ITO上涂膜烧结制成纳米TiO2薄膜电极。利用循环伏安法发现纳米TiO2薄膜电极表面有.OH产生,并进一步利用电子自旋共振(ESR)谱来检测.OH的产生情况。得到在自然光下,纳米TiO2薄膜电极吸收紫外光能量后产生了空穴(h+),与吸附在电极表面的水分子反应产生.OH。通过降解甲醛的实验,初步验证了.OH光催化降解甲醛的机理。更多还原

【Abstract】 It was applied for the preparation of nano-TiO₂ sol to separate nano-TiO₂ in tetrabutyl titanate,which was roasted on the substrate of the conductive glass to form nanocrystalline TiO₂ film electrode.In this paper,the ·OH was discovered on the surface of nanocrystalline TiO₂ film electrode by cyclic voltammetry,which was ulteriorly detected by the electron spin resonance（ESR） spetra.It can be conclude that film electrode absorb UV light energy and create vacancies（h⁺）,which react with H₂O molecule on the surface of electrode.Reaserch on degradation of formaldehyde to show the mechanism of the ·OH photocatalysing formaldehyde.更多还原