Synthesis, Characterization and Gas Sensing Properties of Ag-doped α-Fe₂O₃ by Solid-state Grinding Method

Title:Synthesis, Characterization and Gas Sensing Properties of Ag-doped α-Fe₂O₃ by Solid-state Grinding Method

Volume: 11 Issue: 4

Author(s): Yan Wang, Guiyun Yi, Kai Li, Guang Sun, Xiaodong Wang, Hari Bala, Zhanying Zhang and Jianliang Cao

Affiliation:

Keywords: Ag-doped α-Fe₂O₃, ethanol, gas sensor, H₂S, solid-state grinding method, synthesis.

Abstract: Ag-doped α-Fe₂O₃ nanoparticles were synthesized by the solid-state grinding method, and the as-prepared samples were characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), thermogravimetry-differential thermal analysis (TG-DTA), and X-ray photoelectron spectroscopy (XPS) techniques. The analysis results indicated that all the particles were of spherical morphology and their size was about 10 nm. The gas sensing properties of the sensors based on the as-prepared Ag/Fe₂O₃ nanoparticles to different gas were investigated in detail. Compared the gas sensing test results of the Ag-doped α-Fe₂O₃ with the -Fe₂O₃ without doped, all of the sensors based on the Ag-doped α-Fe₂O₃ nanoparticles possess much better sensing behavior than that of pure α-Fe₂O₃. The sensor based on the 300 °C-calcined 3%-Ag/Fe₂O₃ materials displayed the maximum response to H₂S at 150 °C, and to ethanol at 245 °C. This solid-state grinding method prepared Ag/α-Fe₂O₃ nanomaterials are promising candidate for low temperature H₂S detection.

Cite this article as:

Wang Yan, Yi Guiyun, Li Kai, Sun Guang, Wang Xiaodong, Bala Hari, Zhang Zhanying and Cao Jianliang, Synthesis, Characterization and Gas Sensing Properties of Ag-doped α-Fe₂O₃ by Solid-state Grinding Method, Current Nanoscience 2015; 11 (4) . https://dx.doi.org/10.2174/1573413711666150213213055