Facile Ionic Liquid Combustion Synthesis and Visible-light Photocatalytic Ability of Mesoporous FeAl2O4 with High Specific Surface Area

Abstract

A facile synthesis route of pure FeAl 2 O 4 via self-combustion of ionic liquid is developed using (C 2 H 5 ) 2 NH¢HCl and urea as cofuels. (C 2 H 5 ) 2 NH¢HCl not only is the source of cation in ionic liquid but also serves as fuel. The products possess pure hercynite phase, mesoporous structure, and large specific surface areas (89185 m 2 g ¹1

Solution Combustion Synthesis of Complex Oxide Semiconductors

“…However, increasing F/O to 2.0 produced a well-crystallized material [49]. A similar trend was also found for the combustion synthesis of FeAl 2 O 4 and MgAl 2 O 4 [24][25][26]. For the synthesis of FeAl 2 O 4 , different molar ratios of urea (3 to 7) were used; excess urea reduced the surface area and increased the particle size.…”

“…For the synthesis of FeAl 2 O 4 , different molar ratios of urea (3 to 7) were used; excess urea reduced the surface area and increased the particle size. However, after a certain F/O ratio, the surface area started to increase [24].…”

Magnetic mapping of hercynite produced by combustion synthesis

“…Spinel structured materials have FCC structure and general formula AB2O4 [1] and can be synthetized by several methods, including co-precipitation, sol-gel [2] and combustion reaction [3]. The latter is particularly convenient, even for nanoparticles, due the low cost, high reaction speed, that may take only a few minutes, and for being energetically efficient, because the reaction environment releases enough energy for the reaction to occur [4]. In this sense, we have synthetized and characterized hercynite particles (FeAl2O4iron-aluminum spinel) with the method described in references [1,3], with citric acid as a combustible.…”

Characterization of Combustion Synthesis of Ferromagnetic FeAl2O4 spinel

“…Several synthesis methods for these materials have been proposed, including co-precipitation, sol-gel [3], and combustion reaction synthesis [4]. The last is particularly convenient because of its low costs, high-reaction speed, and also energy efficient as the reaction release energy, which is contrary to other techniques mentioned [5]. In this work we synthetize and characterize FeAl2O4 spinel because of its magnetic properties and wide possibility of applications.…”

“…Such solutions were mixed and heated up to 500 °C in a hot plate until ignition occurred, burning and the production of a solid products in a powder form [6]. This method is particularly advantageous compared to other combustion synthesis since does not require a muffle furnace, complex combustibles [4] or multiple combustibles [5]. The final product has been characterized in terms of structure and compositional by means of X-ray diffraction (DRX -Panalytical), and Analytical Electron Microscopy (AEM): scanning electron microscopy (SEM JEOL 7100F) and scanning and transmission electron microscopy (TEM/STEM -JEOL 2100F), aiming at phase identification of the solid product as well as detailed morphological characterization.…”