Improved photocatalytic and gas sensing properties of α-Fe2O3 nanoparticles derived from β-FeOOH nanospindles

Hydrothermal synthesis, growth mechanism and gas sensing properties of Zn-doped α-Fe2O3 microcubes

“…However, there are few reports on Zn-doped α-Fe 2 O 3 microcubes with gas sensing properties. The gas sensors were fabricated from the as-prepared Zn-doped α-Fe 2 O 3 microcubes obtained at 160 1C for 12 h. Previous works have indicated that the sensitivity of sensor is greatly influenced by the operating temperature [20]. In order to find the optimum operating temperature the sensors to 30 ppm acetone are tested at different operating temperatures, as shown in Fig.…”

Synthesis and Use in Catalysis of Hematite Nanoparticles Obtained from a Polymer Supported Fe(III) Complex

“…In fact, by using neat 1-propanol microcrystalline magnetite (Fe 3 O 4 ) formed, while adding 1-3 % of water to 1-propanol yielded only hematite (α-Fe 2 O 3 ) which, in turn, slowly transformed into magnetite after a long reaction time. In 2014, Yan et al synthesized α-Fe 2 O 3 nanoparticles by calcination of the spindle-like β-FeOOH precursors at 600 °C for 2 h. [22] By using co-precipitation method, in 2015 Farahmandjou et al reported the synthesis of hematite NPs by using FeCl 3 • 6H 2 O as precursor and ammonia solution as precipitator. The α-Fe 2 O 3 nano-powders, with a particle size about 30 nm, were obtained by calcination at 500 °C.…”

Surface-Controlled Photocatalysis and Chemical Sensing of TiO2, α-Fe2O3, and Cu2O Nanocrystals

“…Hematite α-Fe 2 O 3 is generally more sensitive to alcohols and NO 2 . A lot of papers appeared on different forms of nanostructured α-Fe 2 O 3 [220][221][222] for gas sensing. Adsorption of water acting as a donor has an important influence on its electronic properties [11].…”