Fe/meso-Al₂O₃: An Efficient Photo-Fenton Catalyst for the Adsorptive Degradation of Phenol

Abstract

A series of Fe(II)/meso-Al 2 O 3 catalysts was prepared by the wetness impregnation method using ferrous sulfate and mesoporous alumina. Mesoporous alumina was synthesized at pH 6 by the precipitation method using aluminum isopropoxide as the aluminum source and sucrose as the template. These catalysts were characterized by different techniques such as SEM, XRD, XPS, FTIR spectroscopy, and BET surface area analysis. The catalytic activities in phenol degradation by the photo-Fenton reaction were evaluated. The effects of H 2 O 2 concentration, pH, and additive (ethanol) on the photo-Fenton reaction were studied. The sample with 0.25 wt % Fe(II)/meso-Al 2 O 3 -6 was found to be an efficient catalyst, showing 98% degradation of 2.1 × 10 -5 mol of phenol at pH 6 in 1 h.

Effects of operating parameters and additives on degradation of phenol in water by the combination of H2O2and hydrodynamic cavitation

“…Among those studies, H 2 O 2 was often used for degradation/ oxidation reaction. It is known that H 2 O 2 in combination with other conventional methods such as ultrasound/Fe [1], microwave and UV [2], ozone [3], photocatalysis [4], electrocoagulation process [5], and UV/Fe 2+ [6] have obtained better results than conventional method alone. Moreover, phenol mineralization by combined hydrodynamic cavitation and heterogeneous advanced Fenton processing was also reported [7].…”

ZnFe2O4‐Decorated Mesoporous Al2O3 Modified MCM‐41: A Solar‐Light‐Active Photocatalyst for the Effective Removal of Phenol and Cr (VI) from Water

“…AOPs are found to be a more successful and alternative way of removing the toxic compounds from wastewater through highly active hydroxyl radicals (OH • ) . Hydroxyl radical is found to be highly active species as the oxidation potential of OH • is E =2.73 V is more than potentials of H 2 O 2 (E =1.78 V) and Ozone (E =2.08 V) ,. In photo‐Fenton reaction, H 2 O 2 along with Fe 2+ ions in presence of light are responsible for the production of reactive species like hydroxyl radicals which have the ability to oxidize the contaminants.…”

“…Nevertheless, developing a semiconductor photocatalyst that can harvest solar light with a broad spectrum from ultraviolet (UV) to visible light and improve the conversion efficiency, is undoubtedly an urgent challenge. To address these issues, different methodologies such as advance oxidation process (AOPs), adsorption, photocatalytic degradation, reverse osmosis, biological treatment, precipitation, and electrodialysis have been utilized for the elimination of both organic and inorganic pollutants from wastewater . AOPs are found to be a more successful and alternative way of removing the toxic compounds from wastewater through highly active hydroxyl radicals (OH • ) .…”

Fenton‐Type Oxidative Degradation of N,N‐Diethyl‐p‐phenylenediamine by a Mesoporous Wormhole Structured FeTUD‐1 Catalyst

“…Recent studies were aimed at the development and utilization of heterogeneous-based Fenton-type processes. Several solid supports containing Fe, such as pillared clays, non-porous solids, mixed metal oxides, and silicabased ordered mesoporous materials, such as MCM-41 and SBA-15 have been researched [14][15][16][17][18][19][20][21][22][23][24][25][26][27].…”