α-fe 2 o 3 Fabrication of nano-microsphere hydrogen sulfide sensitive materials and components
A technology of nano-microspheres and hydrogen sulfide, which is applied in the fields of analysis of materials, material resistance, nanotechnology, etc., can solve the problems of large amount of ionic liquid and high preparation cost, and achieve uniform morphology, good dispersibility, synthesis and post-processing methods. simple effect
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[0022] First add 2.0 mmol FeCl 3 ·6H 2 O and 0.05-0.1 mmol [C 12 mim][PF 6 ] mixed and dissolved in 35 mL of water, and magnetically stirred for 60 min; the resulting mixture was transferred to a 30-50 mL stainless steel self-pressurized reactor with a polytetrafluoroethylene liner, sealed, and kept at 150-210 °C React for 8-12 hours. Naturally cooled to room temperature and centrifuged to obtain a red iron oxide precursor.
[0023] The precursor was washed several times with ultrapure water and ethanol, and then dried in vacuum at 80 °C for 12 hours. The scanning electron microscope image of the powder is as follows: Figure 1-2 shown. It can be seen from the figure that the precursor is a monodisperse nanosphere with a diameter of about 2 μm, and a rough spherical structure formed by self-assembly and accumulation of nanoparticles with a particle size of 20-100nm.
[0024] The XRD patterns obtained after the precursors were heat-treated at 250, 400 and 600 °C for 2 hou...
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