Enhancement of oxygen sensing performance of metalloporphyrin film modified with nano Al2O3 powder

Honglin Zhang; Ke Zhang; Zhiguo Zhiguo; Jian Hao

doi:10.1016/j.heliyon.2023.e18300

Enhancement of oxygen sensing performance of metalloporphyrin film modified with nano Al₂O₃ powder

Heliyon. 2023 Jul 17;9(7):e18300. doi: 10.1016/j.heliyon.2023.e18300. eCollection 2023 Jul.

Authors

Honglin Zhang¹, Ke Zhang², Zhiguo Zhiguo³, Jian Hao⁴

Affiliations

¹ College of General Education, Guangzhou Huali College, Guangzhou, 511325, China.
² MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China.
³ School of Instrumentation Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China.
⁴ State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan, 750021, China.

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 K_SV 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.

Keywords: Al2O3 modification; Oxygen sensing; Stern-volmer equation.