Hydrothermal synthesis, characterization and magnetic properties of BaFe2O4 nanostructure as a photocatalytic oxidative desulfurization of dibenzothiophene

Abstract

In this work BaFe 2 O 4 nanostructure have been produced hydrothermal method using PTSA (p-toluenesulfonic acid) as fuel. The as-produced nanostructures were characterized by techniques like X-ray powder diffraction (XRD), Fourier transform infrared spectra (FT-IR), Energy-dispersive X-ray spectrometry (EDS), Scanning electron microscopy (SEM) and vibrating sample magnetometer (VSM). The photocatalytic oxidation of dibenzothiophene (DBT), benzothiophene (BT) and dodecanethiol (RSH) in model oil was studied at room temperature (30 o C) with catalyst. The system contained BaFe 2 O 4 , H 2 O 2 , and acetonitrile liquid, UV-Vis lamp which played vitally important roles in the photocatalytic oxidative desulfurization. Especially, the molar ratio of H 2 O 2 and sulfur (O/S) was only 3:1, which corresponded to the stoichiometric reaction. The sulfur removal of DBT-containing model oil with BaFe 2 O 4 could reach 96.6%. The system could be recycled seven times without a significant decrease in photocatalytic activity.

Preparation and Identification of BaFe2O4 Nanoparticles by the Sol–Gel Route and Investigation of Its Microwave Absorption Characteristics at Ku-Band Frequency Using Silicone Rubber Medium

“…The FTIR analysis was used to determine the structure and measurement of chemical species. According to the results shown in Figure 3, the peaks at 497.12, 618.30, and 764.16 cm −1 are related to stretching vibrations of Ba 2+ -O 2− and Fe 3+ -O 2− in the octahedral and tetrahedral sites, and the peaks at 1053.63 and 1111.98 cm −1 are associated with vibrations of M-O-M (M = Ba 2+ or Fe 3+ ) in the finger print region corresponding to the orthorhombic crystalline structure of the prepared BaFe2O4 nanoparticles [2,7,8]. The peak at 1630.34 cm −1 and broadband absorption at 3434.51 cm −1 are attributed to the bending and stretching vibration of the O-H bond associated with adsorbed water as well as the remaining hydroxyl functional groups on the surface of the nanoparticles [5,6].…”

“…In recent decades, extensive research has been performed to improve the synthesis methods to increase crystal purity, decrease size, and control the morphology of the nanostructures. Diverse methods have been used to prepare of BaFe2O4 nanoparticles, such as spray pyrolysis, co-precipitation, microemulsion, ball milling, and hydrothermal approaches [1][2][3]. The crystallinity, size, and shape of the nanostructures are the most influential factors on the properties of nanomaterials [4].…”

“…The crystallinity, size, and shape of the nanostructures are the most influential factors on the properties of nanomaterials [4]. Most of methods require a high calcination temperature of about 800-1000 °C [2,5,6]. In this research, a single phase of ferrite nanoparticles was prepared by the sol-gel method with a low sintering temperature.…”

Green and efficient organic–inorganic hybrid nanocatalyst for oxidative desulfurization of gasoline

“…In recent decades, bentonite (BEN) has attracted more attention as a new type of mesoporous material due to its useful physical and chemical properties, low cost, thermal stability, high exchange capacity and adsorptive affinity for organic and inorganic ions . BEN has been widely applied as a binder of metal oxide adsorbents for sulfur dioxide, dibenzothiophene and ethylbenzene …”

Designing multifunctional SO3H-based polyoxometalate catalysts for oxidative desulfurization in acid deep eutectic solvents

“…[1][2][3][4] However, removal of alkylated dibenzothiophenes (DBTs), such as 4,6-dimethyldibenzothiophene, requires high temperature and pressure, and highactivity catalysts, making the HDS process very expensive. [5][6][7] Several techniques have been developed to address this limitation, the most widely researched of which are oxidative desulfurization (ODS), [8][9][10] adsorptive desulfurization (ADS), 11 extractive desulfurization (EDS), 12 and biodesulfurization (BDS). 13 Oxidative desulfurization has several advantages over the other techniques because of its mild operating conditions and high efficiency for removing DBTs.…”