黄腐酸键联5,10,15,20-四(2-羟基苯基)铁(Ⅲ)卟啉的合成及其性能的研究

Studies on synthesis and activity of fulvic acid bonded 5,10,15, 20-tetrakis(2-hydroxyphenyl)-porphyrin iron(Ⅲ)

通过甲醛缩聚将黄腐酸与5,10,15,20-四(2-羟基苯基)铁(III)卟啉键联,合成一种复合型铁卟啉催化剂。研究了其在KHSO5体系中,pH值及2,4-二氯苯酚初始浓度对复合型催化剂和铁卟啉催化剂降解2,4-二氯苯酚效果的影响。当催化剂∶KHSO5∶二氯苯酚=1∶100∶30(摩尔浓度比),温度为25℃,pH值为3,反应时间1 h,复合型催化剂对二氯苯酚的降解率可达96.4%,高于铁卟啉催化剂的62.3%。通过紫外光谱检测两种催化剂在KHSO5参与反应时的自降解情况,两者的自降解动力曲线表明,复合型催化剂的自降解时间与速率都优于铁卟啉催化剂。结果表明,键联黄腐酸可有效的抑制铁卟啉催化剂自降解,提高催化剂的催化活性及稳定性。

A kind of compound catalyst was synthesized by formaldehyde polycondensation of fulvic acid and 5,10,15,20-tetrakis（2-hydroxyphenyl） -porphyrin iron （Ⅲ）. In KHSO5 system, several influence of degradation effect of the compound catalyst and iron porphyrin catalyst for the 2,4-dichlorophenol, such as pH value ,2,4-dichlorophenol initial concentration were investigated. When the catalyst： KHSO5： dichloro- phenol = 1 ： 100：30 （ molar concentration ratio） ,25 ℃, pH = 3, reaction time 1 h, dichlorophenol degradation rate of the compound catalyst was 96.4% ,higher than 62.3% of the iron porphyrin catalysts. Detected by UV spectra for two catalysts when KHSO5 participate in the reaction from the degradation of both self-degradation power curve shows that the composite-type catalyst from the degradation time and rate are superior to iron-porphyrin catalysts. The results indicate that fulvic acid-bonded catalyst can inhibit catalyst from self-degradation, and improve its activity and stability.