Design and development of conjugated polymer-ferrite composite for selective recognition of NO2 vapors br

The present work mainly focused on the synthesis and characterization of o-aminophenol-aniline copolymer with Ni-ZnFe 2 O 4 nano composite for selective recognition of NO 2 gas. The polymer composite sensors showed excellent specificity with sensing response of 70% with LOD of 38.2 ppb for NO 2 gas at room temperature. The specific surface area of the Ni-ZnFe 2 O 4 was found to be 50.806 m 2 /g with average pore diameter of 12.16 nm. The polymer composite with 10% of Ni-ZnFe 2 O 4 showed highest response of 3s with good repeatability and maximum sensitivity of 1.34 for NO 2 target gas. Newly prepared polymer composite sensors showed good stability up to 60 days without any noticeable change under ambient conditions. Theoretical calculations also reveal the moderate binding energies ( similar to 0.8 eV) between polymer and NO 2 , thus offering high selectivity and good reversibility towards NO 2 gas sensing. (c) 2022 Elsevier B.V. All rights reserved.

Automated summary

The present work focused on the synthesis and characterization of o-aminophenol-aniline copolymer with Ni-ZnFe 2 O 4 nano composite for selective recognition of NO 2 gas. The polymer composite sensors showed excellent specificity and sensitivity at room temperature, and exhibited stable performance.