Effect of Pr/Zn on the anti-humidity and acetone-sensing properties of Co3O4 prepared by electrospray. Issue 30 (4th July 2022)

• Record Type: Journal Article
• Authors: Fan, Xiangxiang; Wang, Junfeng; Sun, Chuanlong; Huang, Chun; Lu, Yujie; Dai, Pan; Xu, Yajuan; He, Wuming
• Is Part Of: RSC advances. Volume 12:Issue 30(2022)
• Page Start: 19384
• Page End: 19393
• Publication Date: 2022-07-04
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d2ra03321f
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : With the synergistic effect of Pr and Zn, the material of Co3 O4 mixed with Pr/Zn exhibits improved properties of anti-humidity and acetone sensitivity. Abstract : Co3 O4 is a P-type metal-oxide semiconductor which can realize acetone detection at a lower temperature, but the lower working temperature brings the enhanced humidity effect. In order to solve the problem of a Co3 O4 gas sensor being easily affected by humidity, an acetone-sensing material of Co3 O4 mixed with Pr/Zn was prepared by electrospray in this work. The optimal working temperature of Pr/Zn–Co3 O4 is 160 °C, and the detection limit can reach 1 ppm. The fluctuation of the acetone response is about 7.7% in the relative humidity range of 30–90%. Compared with pure Co3 O4, the anti-humidity property of this material is obviously enhanced, but the gas-sensing response deteriorates. Compared with Pr–Co3 O4, the anti-humidity and acetone sensing properties of Pr/Zn–Co3 O4 were both improved. The morphology, composition, crystal state and energy state of the material were analyzed by SEM, EDS, XRD and XPS. The material of Pr/Zn–Co3 O4 is a multi-component mixed material composed of PrCoO3, ZnO, Pr6 O11 and Co3 O4 . The improved anti-humidity and acetone sensing properties exhibited by this material are the result of the synergistic effect of ZnO and Pr 3+ .