【摘要】 采用溶胶-凝胶法制备了纳米Fe³⁺/TiO₂光催化剂,并用X射线衍射、傅里叶变换红外光谱和透射电子显微镜等技术对其粒径和晶相进行表征。考察了Fe³⁺掺杂量、乙醇加入量、水加入量、体系pH、陈化时间、锻烧温度等因素对该催化剂降解罗丹明B溶液的影响,得到了催化剂的最佳制备条件:钛酸四丁酯10 mL、Fe³⁺掺杂量（质量分数,基于体系的总质量）为0.010%、乙醇50 mL、水5.0 mL、体系pH=1.5、陈化时间3 d、煅烧温度400℃。实验结果表明,以在最佳条件下制备的纳米Fe³⁺/TiO₂和纯纳米TiO₂为光催化剂,在相同的操作条件下对含酚炼油废水进行光催化降解,纳米Fe³⁺/TiO₂比纯纳米TiO₂具有更好的降解效果,挥发酚的降解率达到75%。更多还原

【Abstract】 Fe³⁺-doped nano-TiO₂(nano-Fe³⁺/TiO₂) photocatalyst was prepared by sol-hydrothermal process and was used in photodegradation of refinery wastewater containing phenol.Particle size and crystal phase of nano-Fe³⁺/TiO₂ were characterized by means of XRD,FTIR and TEM.Effects of Fe³⁺-doping amount,ethanol dosage,water addition amount,system pH,aging time and calcination temperature in the catalyst prepration on the photocatalyst activity in degradation of Rhodamine B solution were investigated.Rhodamine B was chosen as a probe compound of phenol.The optimal preparation conditions for nano-Fe³⁺/TiO₂ photocatalyst were:tetrabutyl titanate 10 mL,Fe³⁺-doping amount（mass fraction,based on total mass of system） 0.010%,ethanol 50 mL,water 5.0 mL, system pH 1.5,aging time 3 d,calcination temperature 400℃.The obtained nano-Fe³⁺/TiO₂ was used as photocatalyst in photodegradation of refinery wastewater containing phenol and compared with nano TiO₂ without Fe³⁺ doping under same degradation conditions.The performance of the former was betterand the degradation rate of the volatile phenol reached 75%.更多还原