碳纳米管-二氧化钛光催化降解普萘洛尔.PDF

34 2010, Vol. 31, No. 21 食品科学 ※基础研究 1 2 1, 陈海波 ，戴 珂 ，陈 浩 * (1.华中农业大学理学院，湖北 武汉 430070 ；2.华中农业大学资源与环境学院，湖北 武汉 430070) 水环境中普萘洛尔残留会对水产食品安全造成危害，并通过食物链威胁人体健康，因此需采取有效的方 法去除普萘洛尔。本实验以碳纳米管 - 二氧化钛纳米复合材料(MWCNTs-TiO2) 为光催化剂，对普萘洛尔溶液进行 光催化降解研究，在最佳实验条件：普萘洛尔质量浓度 20mg/L 、溶液初始pH 值为 7 、10% MWCNTs-TiO2 光催 化剂加入量 2.0g/L 时，紫外光照射 180min 普萘洛尔的降解率达到 95% 。并对普萘洛尔的降解机理进行初步探讨， 结果表明 MWCNT-TiO2 降解普萘洛尔主要发生·OH 氧化反应，从而达到有效降解普萘洛尔的效果。 碳纳米管 - 二氧化钛纳米复合材料(MWCNTs-TiO2 ) ；光催化剂；普萘洛尔；机理 Photocatalytic Degradation of Propranolol with MWCNTs-TiO2 Composite 1 2 1, CHEN Hai-bo ，DAI Ke ，CHEN Hao * (1. College of Science, Huazhong Agricultural University, Wuhan 430070 China； 2. College of Resource and Environment, Huazhong Agricultural University, Wuhan 430070, China) Abstract ：Residual propranolol in the aquatic environment would cause harm to aquatic products safety, and even threaten human health through the food chain, so it is necessary to take effective measures to remove propranolol. The photocatalytic degradation of propranolol in aqueous heterogeneous solution containing nanosized multi-walled carbon nanotubes (MWCNTs)- TiO2 composite as a photocatalyst was investigated under ultraviolet (UV) illumination, and the optimal experimental conditions for the photocatalytic degradation of propranolol such as propranolol concentration, initial pH, catalyst dose, light illumination time and mixing ratio for MWCNTs and TiO2 were determined. After 180-min UV illumination under optimized experimental conditions, the degradation rate of propranolol wa