摘要
本实验采用P25(商用纳米TiO2)为光催化剂,以罗丹明B溶液的降解为模型反应,讨论了降解体系pH值及外加氧化剂H2O2的用量对罗丹明B溶液降解效果的影响.实验结果表明,在250W汞灯的照射下,单独使用P25,140 min时罗丹明B的降解率低于5%,但增加体系的酸度或者加入一定量氧化剂H2O2时,P25对罗丹明B的降解率有明显改善.当pH值为3,加入1.5mL H2O2时,80 min时罗丹明B的降解率即可达到90%以上,而当pH值为6时,需加入5mL H2O2,120 min时罗丹明B的降解率才能达到90%以上.
By adopting the degradation process of Rhodamine B solution as model reaction, the factors influencing the degradation effect of P25 （commercial nano-TiO2） such as pH value of the system and the dosage of additional H2O2 oxidant were discussed. The experimental results showed that the degradation rate of Rhodamine B solution was less than 5 % using P25 as photocatalyst under the irradiation of 250W mercury lamp, and the degradation rate increased significantly when increasing the acidity of the system or adding the dosage of H2O2 oxidant. The degradation rate of Rhodamine B was more than 90 % at 80 min with the pH value 3 and adding 1.5mL H2O2, and the degradation rate can reach above 90 % at 120 min when the pH value is 6 and the dosage of H2O2 is 5mL.
出处
《内蒙古民族大学学报（自然科学版）》
2013年第1期19-21,共3页
Journal of Inner Mongolia Minzu University：Natural Sciences
基金
国家自然科学基金资助项目(21061010)
内蒙古自治区人才开发基金资助项目(2009)
