Effects of Solvent Diols on the Synthesis of ZnFe2O4 Particles and Their Use as Heterogeneous Photo-Fenton Catalysts

Abstract

A solvothermal method was used to prepare zinc ferrite spinel oxide (ZnFe2O4) using ethylene glycol and 1,4 butanediol as solvent diols, and the influence of diols on the physical properties of ZnFe2O4 particles was investigated. The produced particles were characterized by X-ray powder diffraction (XRD), atomic force microscopy (AFM), Fourier transform infrared spectroscopy (FTIR) and nitrogen adsorption isotherms, and the catalytic activity for the organic pollutant decomposition by heterogeneous photo-Fenton reaction was investigated. Both solvents produced particles with cubic spinel structure. Microporous and mesoporous structures were obtained when ethylene glycol and 1,4 butanediol were used as diols, respectively. A higher pore volume and surface area, as well as a higher catalytic activity for the pollutant degradation were found when 1,4 butanediol was used as solvent.

Preparation of Mesoporous Fe2O3-Supported ZSM-5 Zeolites by Carbon-Templating and their Evaluation as Photo-Fenton Catalysts to Degrade Organic Pollutant

“…Subsequently, the respective mixture was charged into PTFE-lined stainless autoclaves and submitted to a hydrothermal treatment at 170 °C for 12 h. After the crystallization step, the formed powders were molecule, which it is widely applied in textile industries. The experimental conditions used in the experiments were based on a previous work 25 . The experiments were carried out at 25 °C using a glass reactor with 0.25 L of capacity.…”

Statistical optimization of Reactive Red 141 removal by heterogeneous photo–Fenton reaction using ZnFe2O4oxide prepared by microwave irradiation

“…Several ironbased materials, such as FeVO 4 , CuFe 2 O 4 , Fe 3 O 4 , α-Fe 2 O 3 , and α-FeOOH have been applied as catalysts in Fenton reaction in order to remove the pollutant compounds [8][9][10][11]. Recently, ZnFe 2 O 4 oxide has received attention due to its high catalytic potential to degrade organic pollutants [12][13][14].…”

“…The analytical grade reagents used in this work were acquired from Synth and Sigma 14 ; soluble in water) was provided by a textile company from southern Brazil. This dye was herein selected, because it is largely employed in textile industries and is a common pollutant in textile effluents [24,25].…”

“…The dye solutions (50 mL) with different initial concentrations (according to the statistical optimization; see Table 1) had the pH adjusted (according to the experimental design; Table 1) and, 0.025 g of ZnFe 2 O 4 was added. It is known that the acidic condition is required for a promising performance of the Fenton reaction [14,26]. The solutions were stirred in the dark at 100 rpm and 25˚C, until reaching the adsorption equilibrium.…”

Preparação do sistema Fe2O3/ZSM-5 para uso como catalisador na reação foto-Fenton

“…A tecnologia Fenton consiste na combinação de peróxido de hidrogênio e cátions de ferro em um meio aquoso, produzindo radicais altamente reativos (HO • ) [8], levando à oxidação do poluente orgânico. Na presença de luz (conhecida como reação foto-Fenton), a velocidade de degradação do poluente aumenta significativamente [9,10].…”