Enhancing heterogeneous catalytic activity of iron (II) phthalocyanine by ethanol and its application in 2,4-dichlorophenol detection

• Published in: Journal of Wuhan University of Technology. Materials science edition 2014-06, Vol.29 (3), p.567-571
• Main Authors: Tong, Yilin, Li, Dapeng, Huang, Jun, Li, Kun, Ding, Liyun, Wang, Tianxia, Gong, Jingjing
• Format: Article
• Language: English
• Subjects: Catalysis; Catalytic activity; Chemistry and Materials Science; Dyes; Ethanol; Ethyl alcohol; Iron; Materials Science; Mathematical analysis; Regression
• ISSN: 1000-2413; 1993-0437
• DOI: 10.1007/s11595-014-0958-8

A chemical system for facile and accurate detection of 2,4-dichlorophenol (DCP) via iron (II) phthalocyanine (Fe(II)Pc) catalyzed chromogenic reaction is reported for the first time. In this system, DCP could be oxidized by dioxygen with the catalysis of Fe(II)Pc and then coupled with 4-aminoantipyrine (4-AAP) to generate pink antipyrilquinoneimine dye. Control experiments showed that the addition of ethanol could obviously enhance the catalytic activity of heterogeneous Fe(II)Pc catalysts because of the partial dissolution of Fe(II)Pc nanocubes, which was confirmed by the SEM analysis. On the basis of the detection results of DCP in the range from 2×10 −5 to 9×10 −4 mol/L, we obtained a regression equation ( A = 0.187 5 + 0.01 209C ( R 2 =0.995 6)) with the detection limit (3σ) of 3.26×10 −6 mol/L, which could be successfully used in detecting the real samples.