Highly sensitive acetone sensor based on conjugated polymer nanocomposites. (8th December 2022)

• Record Type: Journal Article
• Authors: Hulimane Shivaswamy, Rashmi; Kanive bagilu Ananthapadmanabha, Vishnumurthy; Kusanur, Raviraj
• Is Part Of: Polymers for advanced technologies. Volume 34:Number 4(2023)
• Page Start: 1118
• Page End: 1132
• Publication Date: 2022-12-08
• Subjects: acetone sensing -- nanocomposite -- o‐amino phenol -- repeatability; Polymers -- Periodicals; 668.9
• DOI: 10.1002/pat.5956
• Languages: English
• ISSNs: 1042-7147

Abstract

Abstract: A copolymer of pyrrole and o‐aminophenol was synthesized by single step oxidative polymerization technique. Two different nanocomposites of copolymer with α‐Fe2 O3 and Co‐α‐Fe2 O3 were prepared and acetone sensing property of both composites were studied at room temperature with different gas concentrations. The calculated sensitivity of the Co‐α‐Fe2 O3 nanocomposite was 0.68 and α‐Fe2 O3 nanocomposite was 0.44. The sensitivity of prepared composites was higher than the pure polymer. The LOD of the α‐Fe2 O3 composite was found to be 0.13 ppm and Co‐α‐Fe2 O3 composite was 0.37 ppm. Both the prepared composites have showed excellent selectivity with good repeatability for the acetone gas. The 20% Co‐Fe2 O3 containing nanocomposite sensor exhibited faster response time of 1.4 s and recovery time of 4.4 s towards the target gas and 15% α‐Fe2 O3 containing nanocomposite sensor exhibited the response time of 1.4 s and recovery time of 4.8 s for the acetone gas. The polymer and the nanocomposites have shown excellent repeatability for 7 cycles. The faster response of the sensor can be attributed to the increased number of oxygen vacancies on the sensor as well as the free OH groups present in the polymer back bone.