Synergistic effect between UV light and PANI/Co3O4 content on TiO2 composite nanoparticles for room-temperature acetone sensing
- Authors
- Lee, Jae-Hyoung; Kim, Jin-Young; Nam, Myung-Sung; Mirzaei, Ali; Kim, Hyoun Woo; Kim, Sang Sub
- Issue Date
- Jan-2023
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Acetone gas sensor; TiO2; Polyaniline; UV illumination
- Citation
- SENSORS AND ACTUATORS B-CHEMICAL, v.375, pp.1 - 11
- Indexed
- SCIE
SCOPUS
- Journal Title
- SENSORS AND ACTUATORS B-CHEMICAL
- Volume
- 375
- Start Page
- 1
- End Page
- 11
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/182343
- DOI
- 10.1016/j.snb.2022.132868
- ISSN
- 0925-4005
- Abstract
- Ternary hybrid composites are less explored for gas sensing purposes due to their complexity of structures. However, their complexity brings about a greater potential for resistance changes. In this study, we have syn-thesized a new ternary hybrid composite composed of polyaniline (PANI)-loaded Co3O4-TiO2 composite nano -particles (NPs) for acetone sensing at 25 degrees C. For this purpose, PANI and Co3O4 were added into TiO2 NPs using sol-gel method. The gas sensing characteristics of PANI-TiO2, Co3O4-TiO2 composite NPs and PANI-loaded Co3O4-TiO2 composite NPs sensors were systematically investigated with and without UV illumination (at 25 degrees C). Based on the sensing results, the ternary 0.01 wt% PANI-loaded 0.85TiO2 -0.15 Co3O4 composite NPs revealed the highest response to acetone under UV illumination at 25 degrees C. The enhanced performance of opti-mized gas sensor was due to formation of p-n heterojunctions, promising effects of PANI, and UV light effect. The results obtained herein, highlighted the possibility of making a highly reliable acetone sensor working at 25 degrees C using this compounds or related compounds.
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