Polyaniline/(TaO-SnO) hybrid nanocomposite for efficient room temperature CO gas sensing

• Published in: RSC advances Vol. 12; no. 25; pp. 15759 - 15766
• Main Authors: Aranthady, Chethana, Shanbhag, Ganapati V, Sundaram, Nalini G
• Format: Journal Article
• Language: English
• Published: England Royal Society of Chemistry 23.05.2022; The Royal Society of Chemistry
• Subjects: Carbon monoxide; Chemistry; Gas sensors; Heterostructures; Hybrid composites; Low concentrations; Nanocomposites; Operating temperature; Oxygen; Polyanilines; Recovery time; Room temperature; Tantalum; Tantalum oxides; Tin dioxide; Vacancies; X ray photoelectron spectroscopy
• ISSN: 2046-2069; 2046-2069
• DOI: 10.1039/d2ra00602b

Development of efficient CO sensors that can detect low concentration CO at room temperature is of prime importance. Herein, we present a Ta 2 O 5 -SnO 2 -PANI hybrid composite for the efficient sensing of CO at room temperature and at very low concentrations. The material was synthesized by the oxidative polymerization method. The structural and morphological characteristics of the nanostructured (Ta 2 O 5 -SnO 2 )-PANI hybrid composite were examined using p-XRD and FESEM techniques. The oxygen vacancies in the material were confirmed by XPS analysis. The hybrid material exhibited superior CO sensing performance with high sensitivity, low operating temperature, and fast response and recovery time compared to the individual counterparts. The enhanced sensing ability of the hybrid material is accredited to the synergistic properties such as conductivity of PANI, improved oxygen vacancies and the heterostructure formed between the PANI and the (Ta 2 O 5 -SnO 2 ) composite. These remarkable features make TaSn : PANI a potential sensor at room temperature for sensing of low concentration CO. Room temperature CO sensing using a hybrid (Ta 2 O 5 -SnO 2 ) : PANI composite material.