Abstract
Lately novel strategies to enhance the sensing properties on iron oxide have been proposed to achieve high performance gas sensors for acetone detection. In this working report, the synthesis of iron-glycerate (Fe-Gly) using glycerol to combine with Fe3+ is first presented. Depending on the thermal treatment, this compound can evolve into γ-Fe2O3, α/γ-Fe2O3 and α-Fe2O3. α/γ-Fe2O3 shows better sensing performance as far as acetone detection is concerned. Using the dual phases of α/γ-Fe2O3 as a fundamental building block, their sensing properties were further improved using Ni doping and Ru nanoparticles functionalization. The high response and selectivity to acetone detection was ascribed to the synergistic effects of unique nanosheets, mixed phases, rich oxygen vacancies and excellent catalytic activity of Ru nanoparticles.Graphical abstract
Highlights
Nowadays, human beings are more exposed to the environmental treats related to industrial development and resources overconsumption
A prominent weight loss of 44.81% occurs when the temperature is further increased to 318 °C due to the decomposition of organic ligands
The phases of the products can be identified in comparison with the Joint Committee for Powder Diffraction Standards (JCPDS) file number of 33–0664 (α-Fe2O3) and 39–1346 (γ-Fe2O3)
Summary
Human beings are more exposed to the environmental treats related to industrial development and resources overconsumption. Keywords Fe2O3 · Dual phases · Nanosheets · Gas sensor · Acetone detection Hjiri’s group has investigated into the effects of Gd doping on the sensing properties of γ-Fe2O3 for acetone detection.
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