Abstract
In this work, the metalloporphyrin film of PtOEP/Poly (St-co-TFEMA) modified by nano Al2O3 powder was prepared, and the enhancement performance of oxygen sensing was studied in detail. It was verified that the modified film extended the residence time of oxygen through the characterization of SEM. The phosphorescence intensity changes with the content of Al2O3 and PtOEP were studied. The Stern-Volmer equations before and after modification of Al2O3 powder was compared. It was found that the linearity of the calibration curve was still high, but the oxygen sensitivity value of KSV was significantly improved due to the increase of quenching probability between indicator and oxygen. Finally, the stability test shows that the Al2O3@PtOEP/Poly (St-co-TFEMA) oxygen sensing film presents a strong anti-photo-bleaching ability, and the response time is shortened.
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