新型TiO_2-铜卟啉催化剂的合成及其光催化甲基橙降解研究

Study on the synthesis of novel TiO_2-copper porphyrin catalyst and photocatalytic degradation of methyl orange

为了研究不同长度侧链催化剂对光催化降解甲基橙溶液的影响,更好地解决水污染治理问题,以1-萘酚为原料,经两步反应得到中间体4-(3-萘氧基-烷氧基)-苯甲醛,利用Lindsey法合成4个结构新颖的卟啉及铜卟啉衍生物,中间体和目标产物的结构经MS,NMR和元素分析进行确认,制备了TiO_2-铜卟啉催化剂,并进行了光催化甲基橙降解实验。结果表明:当铜卟啉衍生物苯环上连有侧链时,其光催化活性优于四苯基铜卟啉催化剂,但侧链的长度对活性的影响不明显。该研究为今后合成高效催化剂提供了思路。

In order to study the effect of different length side chain catalysts on photocatalytic degradation of methyl orange solution,solving the poroblem of water pollution control,four novel porphyrins and their corresponding copper complexes are synthesized from the starting material 1-naphthol,and their structures are characterized by MS,NMR and elemental analysis.Novel TiO2-porphyrins hybrid systems are prepared and its photocatalytic activity is investigated by photodegradation of methyl orange in aqueous solution under visible light.The results indicate that when there are side chains on the benzene ring of copper-porphyrin derivatives,the photocatalytic activity of substituted TiO2-copper porphyrins is better than TiO2-copper tetraphenyl porphyrin,but the effect of the side chains＇ length on the activity is not obvious.This study provides an idea for the synthesis of highly efficient catalysts in the future.