Phase identification and morphology study of hematite (Fe2O3) with sintering time varitions

Abstract

Abstract. Iron oxide has been the interest of many studies due to its applications in various scientific and industrial fields including in environment, corrosion, soil science, and exhaust emissions. Iron oxide (Fe2O3) has potential applications in catalytic reactions in electronic devices such as semiconductors, paint formulations, and lithium rechargeable batteries. Fe2O3 can be synthesized through the process of stirring, decomposition of organic iron, sol-gel, combustion, and evaporating solvents. Most of the methods used involve several steps and take a long time. The aim of this research was to investigate the phase and morphology characterization of iron oxide (Fe2O3) powder with solvent ethylene glycol after being sintered for 1 hour, 2 hours and 3 hours. The characterization tools utilized were XRD, SEM-EDX, and FTIR. The results of XRD analysis showed that the Fe2O3 sintered for 1 hour had the smallest crystallite size with a diameter of 21.05 nm. In the XRD test, the beam of X-ray was shot directly at the grain being tested. The results of SEM analysis showed thatthe Fe2O3 sintered for 1 hour produced the best result due to its crystallite size of 12.36 nm and hada shape of homogeneous nanosphere; the duration of sintering indeed had a great influence on the grain size of iron oxide (Fe2O3). In addition, the results of the elemental composition analysis indicate that the longer the sintering process, the higher the concentration of O but the lower the Fe.

Ni–Fe Cocatalysts on Magnesium Silicate Supports for the Depolymerization of Kraft Lignin

“…This may provide iron oxides in the Ni− Fe/MS catalyst, thus increasing acidic sites to promote the deoxygenation ability and enable better selectivity. These results also agree with those presented by Zhai et al 14 So far, several researchers have reported the effect of the Ni−Fe ratio on various supports, such as activated carbon, 14 mesoporous carbon spheres, 41 and CeO 2 −Al 2 O 3 . 48 The results revealed that Ni−Fe in a 1:1 ratio exhibited better performance in lignin depolymerization than the monometallic catalyst.…”

“…00-002-0546). On the other hand, the main diffraction peaks of 20Fe/MS at 2θ 43.50° for Fe and 2θ 33.35, 55.90, and 62.30°, additionally observed, confirmed the formation of Fe 2 O 3 . 20Ni/MS also showed diffraction peaks at 2θ 43.90, and 76.80°, indicating the existence of 111 and 220 planes of Ni, respectively .…”

Hybrid Technique for Removal of Arsenic from Drinking Water

“…8 shows the XRD analysis of the calcined samples of As(III) and As(V). The XRD pattern confirms the formation of ferric oxide in both the precipitates 71. The peak positions obtained are 24.12 (012), 33.16 (104), 35.64 (110), 40.88 (113), 49.44 (024), 54.06 (116), 57.56 (018), 62.42 (214), and 63.98 (300).…”

Gas sensing properties of hematite nanoparticles synthesized via different techniques

“…The corresponding 2θ peaks located at ∼24°, 33°, 35°, 41°, 50°, 54°, 58°, 62°, and 64° represent the crystal planes of (012), (104), (110), (113), (024), (116), (018), (214), and (300), respectively. 24,25 No secondary phases were observed, indicating the high purity of the synthesized materials. As depicted in Fig.…”