2013年3月1日 · α-Fe 2 O 3 nanoparticles were synthesized by a low temperature solution combustion method. The structural, magnetic and luminescence properties were studied. Powder X-ray diffraction (PXRD) pattern of α-Fe 2 O 3 exhibits pure rhombohedral structure. SEM micrographs reveal the dumbbell shaped particles.

2020年3月1日 · EPR is a sensitive and powerful technique that allows the identification of the presence and concentration of oxygen vacancies. The EPR spectra of α-Fe 2 O 3 and 5%Ca-Fe 2 O 3 are shown in Fig. 5. A weak signal can be observed in the EPR spectrum of α-Fe 2 O 3, which is typical of electrons trapped in oxygen vacancies [43].

2021年10月5日 · In this study, oxygen vacancies enriched α-Fe2 O 3 was prepared from thermally treated goethite (α-FeOOH) and employed as a PMS activator. Systematic characterization demonstrated that α-Fe2 O 3 with most abundant oxygen vacancies could be obtained by heating α-FeOOH at 300 °C.

EPR spectroscopy shows that the α-Fe2O3 is superparamagnetic, showing an intense narrow EPR signal at room temperature which shifts to a lower field and broadens to be barely detectable at 77 K or below.

2019年12月1日 · Low oxygen annealing can activate a significant photoelectrochemical response of α-Fe 2 O 3 even at a low temperature of 400 °C and provide an excellent PEC performance compared with classic air annealing.

Three types of iron-based oxide nanoparticles (weight compositions Fe2O3, BaFe2O4, and BaFe12O19) embedded in a polyethylene matrix are studied using the electron paramagnetic resonance...

2010年6月1日 · Fe3O4/Fe2O3/TiO2/Ag: an innovative photocatalyst under visible light irradiation in deep eutectic solvent for efficient conversion of 5-HMF to chemo-and bio-based chemicals besides their determination using HPLC.

α-Fe (2)O (3) nanoparticles were synthesized by a low temperature solution combustion method. The structural, magnetic and luminescence properties were studied. Powder X-ray diffraction (PXRD) pattern of α-Fe (2)O (3) exhibits pure rhombohedral structure. SEM micrographs reveal the dumbbell shaped particles.

α-Fe2O3 nanoparticles were synthesized using Tabebuia aurea leaf extract by a facile approach. The signature peaks for Fe and O in the EDX spectrum verified the formation of Fe2O3 nanoparticles. Cuboidal-shaped nanoparticles were observed in the FE-SEM image.

2010年3月18日 · FTIR spectra exhibit characteristic absorption bands for B 2 O 3 and Bi 2 O 3 for their various structural units. The EPR spectra exhibit two resonance signals at g ≈ 6.4 and g ≈ 4.2 for Fe 2 O 3 doped glasses. The resonance signals at g ≈ 4.2 and g ≈ 6.4 are attributed to Fe 3+ ions in rhombic and axial symmetry sites, respectively.