摘要
以四氯化锡(Ⅳ)五水化合物、钛酸四丁酯作为前驱体,以硝酸铈作为Ce源,采用溶胶凝胶法-共沉淀法相结合制备Ce掺杂TiO_(2)-SnO_(2)粉体。用甲基红模拟污染物作为目标降解物,以污染物的降解率作为光催化性能的主要评价指标,考察了SnO_(2)摩尔分数、Ce掺杂量、光照时间等因素对光催化性能的影响。用扫描电镜(SEM)、X射线衍射(XRD)、拉曼光谱、紫外-可见漫反射光谱(UV-Vis DRS)对材料进行表征。实验结果表明,当Sn^(4+)复合比为10.00%、Ce^(4+)掺杂比为1.00%时材料呈现最优形貌与晶相结构;Ce掺杂样品在波段>420nm的光响应增强;LED光照下搅拌时间4 h,对0.050 g/L甲基红溶液的降解效率最高,为76.78%。
Ce-doped TiO_(2)-SnO_(2) powders were prepared by sol-gel method and co-precipitation method using tin tetrachloride(IV)pentahydrate and tetrabutyl titanate as precursors and cerium nitrate as Ce source.The methyl red was used as the target pollutant,and the degradation rate of the pollutant was used as the main evaluation index of the photocatalytic performance.The effects of SnO_(2) molar fraction,Ce doping amount and illumination time on the photocatalytic performance were investigated.The materials were characterized by scanning electron microscopy(SEM),X-ray diffraction(XRD),Raman spectroscopy and UV-Vis diffuse reflectance spectroscopy(UV-Vis DRS).The experimental results show that the material exhibits the optimal morphology and crystal phase structure when the Sn^(4+) composite ratio is 10.00%and the Ce^(4+) doping ratio is 1.00%.The light response of Ce-doped samples is enhanced in the band of>420 nm.The degradation efficiency of 0.050 g/L methyl red solution was the highest(76.78%)when the stirring time was 4 hours under LED illumination.
作者
周树年
唐小强
张贞发
赵汉民
Zhou Shunian;Tang Xiaoqiang;Zhang Zhenfa;Zhao Hanmin(Guangxi Normal University for Nationalities,Chongzuo 532200,China)
出处
《广东化工》
2026年第1期13-16,共4页
Guangdong Chemical Industry
基金
2020年广西民族师范学院校级科研项目(2020YB008)(民师院科研[2020]3号)。
