Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 651, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.colsurfa.2022.129727
Keywords
Sulfide detection; Porphyrin; Porous organic polymer; Oxidase-like activity
Categories
Funding
- National Natural Science Foundation of China (NSFC) [21601142]
- Open Project of Key Laboratory of Green Chemical Engineering Process of Ministry of Education [GCP202116]
- Outstanding Young and Middle-aged Scientific Innovation Team of Colleges and Universities of Hubei Province: Biomass chemical technologies and materials [T201908]
- Innovation Project of Key Laboratory of Novel Biomass-Based Environmental and Energy Materials in Petroleum and Chemical Industry [2022BEEA07]
- second batch of the Key Research and Development Project of Hubei Province [2020BAB073]
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In this study, a porous organic polymer based on iron porphyrin (Fe-PPOP) was synthesized and used for the detection of sulfide ions. Fe-PPOP exhibited high selectivity and sensitivity, and sulfide detection can be achieved through a simple colorimetric method, with high reliability and accuracy.
The high concentration of sulfide in environment does great harm to human beings' health due to its toxicity, corrosivity, and disagreeable odor. Therefore, it's highly urgent to develop a simple, selective, and sensitive method for sulfide ion detection. In this work, we synthesized an iron porphyrin-based porous organic polymer (Fe-PPOP) through a facile Friedel-Crafts reaction. The structure of Fe-PPOP was confirmed through a series of methods, such as FT-IR, SEM, EDS, TEM, XPS and nitrogen physisorption. Fe-PPOP exhibited high oxidase-like activity, which could catalyze the oxidization of colorless 3,3',5,5'-tetramethylbenzidine (TMB) into blue product (ox-TMB) in the presence of oxygen. With the addition of sulfide ion to the above system, the color of solution gradually changed from blue to colorless. Therefore, the Fe-PPOP/TMB system could be used for sulfide detection through a facile colorimetric method. The interference experiments using other similar ions verified the high selectivity of Fe-PPOP for sulfide detection. The limit of detection (LOD) of sulfide was calculated to be 1.08 mu M. This work provided a promising method for sulfide measurement in environmental pollutants with high reliability and accuracy.
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