Flower-like In2O3/ZnO heterostructure with accelerated multi-orientation electron transport mechanism for superior triethylamine detection

• Published in: Applied surface science Vol. 569; p. 151074
• Main Authors: Ma, Qian, Chu, Shushu, Li, Hang, Guo, Jia, Zhang, Qi, Lin, Ziqiong
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.12.2021
• Subjects: Electron transport; Flower-like; Gas sensor; In2O3/ZnO heterostructure; Triethylamine; In2O3/ZnO heterostructure; Gas sensor; Electron transport; Flower-like; Triethylamine
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2021.151074

[Display omitted] •2D flower-like In2O3/ZnO composite derived from In2O3 precursor/ZIF-8 is gained.•Composite has flower-like In2O3/ZnO structure composed of needle-like nanorods.•Sensors show an excellent gas-sensing response of 188.01 to 100 ppm TEA at 120 °C.•Mechanism is mainly due to the accelerated multi-orientation electron transport.•In2O3-based sensors can be used for actual detecting area of seafood storage. Flower-like In2O3/ZnO heterostructures consisting of the assembled needle-like nanorods derived from In2O3 precursor/ZIF-8 have been prepared by a two-step approach. Flower-like In2O3/ZnO structures can be achieved by adjusting the nucleation competition and crystal surface matching of In2O3 and ZnO, leading to the enhancement of gas adsorption on the surface, chemical reaction kinetics, and the electron transport efficiency. In/Zn-2 sensors exhibit excellent gas-sensing response value of 188.01 to 100 ppm triethylamine at 120 °C as well as good gas selectivity, long-term stability, and linear relationship compared with pure In2O3, mainly attributed to the accelerated multi-orientation electron transport mechanism within flower-like In2O3/ZnO heterostructures. In addition, In/Zn-2 samples can be utilized to detect the practical triethylamine gas released during the storage of marine organism (fishes).