High Sensing Performance Toward Acetone Vapor Using TiO2 Flower-Like Nanomaterials

Weiye Yang; Quanhong Ou; Xueqian Yan; Lei Liu; Shaoyu Liu; Huohuo Chen; Yingkai Liu

doi:10.1186/s11671-022-03721-4

High Sensing Performance Toward Acetone Vapor Using TiO₂ Flower-Like Nanomaterials

Nanoscale Res Lett. 2022 Sep 2;17(1):82. doi: 10.1186/s11671-022-03721-4.

Authors

Weiye Yang^{1

2

3

4}, Quanhong Ou^{1

2

3}, Xueqian Yan^{1

2

3}, Lei Liu^{1

2

3}, Shaoyu Liu^{1

2

3}, Huohuo Chen^{1

2

3}, Yingkai Liu^{5

6

7}

Affiliations

¹ Yunnan Key Laboratory of Opto-Electronic Information Technology, Yunnan Normal University, Kunming, 650500, China.
² Institute of Physics and Electronic Information, Yunnan Normal University, Kunming, 650500, China.
³ Key Laboratory of Advanced Technique and Preparation for Renewable Energy Materials, Ministry of Education, Yunnan Normal University, Kunming, 650500, China.
⁴ Zunyi Medical University, Zunyi, 563000, China.
⁵ Yunnan Key Laboratory of Opto-Electronic Information Technology, Yunnan Normal University, Kunming, 650500, China. liuyingkai99@163.com.
⁶ Institute of Physics and Electronic Information, Yunnan Normal University, Kunming, 650500, China. liuyingkai99@163.com.
⁷ Key Laboratory of Advanced Technique and Preparation for Renewable Energy Materials, Ministry of Education, Yunnan Normal University, Kunming, 650500, China. liuyingkai99@163.com.

Abstract

For real-application gas sensors, high performances (response, selectivity, response/recovery time and stability) are demanded. An effective strategy is applying nanomaterials in gas sensors. In this study, the anatase TiO₂ flower-like nanomaterials (FLNMs) are prepared through a one-step hydrothermal method which exhibit high-performance toward acetone vapor. TiO₂ FLNMs sensors property are characterized at optimal working temperature of 330 °C with selectivity (acetone), response (S = 33.72 toward 250 ppm acetone), linear dependence (R² = 0.9913), response/recovery time (46/24 s toward 250 ppm acetone) and long-term stability (30 days). These demonstrate that TiO₂ FLNMs get a high performance for acetone sensor. Moreover, the limit of detection of acetone is 0.65 ppm which is lower than that of exhaled air for diabetes (0.8 ppm), indicating that TiO₂ FLNMs gas sensor gets potential application in medical diagnosis.

Keywords: Acetone; Flower-like TiO2; Gas sensing; Hydrothermal method; Medical diagnosis.

Grants and funding

No.11764046/National Natural Science Foundation of China