镧硫共掺杂纳米 TiO2可见光催化性能研究

摘要

In order to study the photocatalytic degradation efficiency of acid red dye wastewater by nano ?TiO2 co?doped with La and S,the anatase La/S/TiO2 powders were prepared by the coprecipitation? impregnation method with tetrabutyl titanate as raw material and characterized with XRD,the process conditions of photocatalytic degradation of acid red under visible light were determined.The experimental results showed that the degradation rate of acid red could reach more than 95% under the optimum conditions as follows:the initial concentration of dye solution was 20 mg·L-1 ,the pH value was 6,catalyst dosage was 16 g · L-1 ,visible light irradiation time was 60 min,and the addition of electron acceptor could significantly improve the photocatalytic activities.%为研究镧硫共掺杂 TiO2对酸性红染料废水的降解效果，以钛酸四丁酯为原料采用共沉淀？浸渍法制备了锐钛型La／S／TiO2催化剂，确定了催化剂在可见光照射下对酸性红溶液的降解工艺条件。实验结果表明：染料溶液初始质量浓度为20 mg·L－1，溶液 pH 值为6，La／S／TiO2的质量浓度为16 g·L－1，室温下可见光照射反应60 min，酸性红降解率可达到95％以上，且电子受体的加入可明显改善其光催化活性。