Fabrication of iron-cerium mixed oxide: an efficient photocatalyst for dye degradation

Abstract

We report herein the fabrication of nanostructured and mesoporous iron-cerium mixed oxides for photocatalytic application. Phase, electronic structure and other properties of the products were characterized by both low-angle and wide-angle X-ray diffraction, diffuse reflectance spectroscopy, transmission electron microscopy, raman spectroscopy, X-ray photoelectron spectroscopy, and N 2 adsorption-desorption isotherm methods. Analytical results demonstrate that the catalyst is in the nano order and mesoporous in nature. These samples were screened for photocatalytic degradation of phenol, methylene blue (MB) and congo red (CR). About 13 % (phenol) and 93 % (MB) photodegradation were observed where as complete mineralization was obtained in case of CR. The reason for higher catalytic activity of 1:1 (Fe/Ce) sample is ascribed to their higher surface area, surface acidity which determines the active sites of the catalyst and accelerates the photocatalytic reaction.

Magnetic and Mössbauer Study of Cerium-Based Reactive Sorbent

“…Recently they appear in combination with cerium dioxide for photocatalytic applications [3] or as a magnetically separable reactive sorbent tested for degradation of the organophosphorus pesticide parathion methyl and some chemical warfare agents -nerve gasses, e.g. soman.…”

Effect of support composition and metal loading on Au catalyst activity in steam reforming of methanol

“…This incorporation can enhance the formation of vacancies in the anion sublattice during the charge balancing, where the redox properties in ceria can be improved. The addition of another interesting support, Fe 2 O 3 , with CeO 2 has been receiving much attention due to the creation of an active solid solution phase (Ce x Fe 1Àx O 2 ), which could be beneficial for many applications [20,23,24]. The Au/CeO 2 eFe 2 O 3 showed high activity for the PROX and WGSR when the strong CeeFe interaction was formed in solid solution [25,26].…”

Laser direct writing of crystalline Fe2O3 atomic sheets on steel surface in aqueous medium

“…On the other hand, magnetic memory devices require each functional oxide layers to be a few atomic monolayers thin. Iron oxide (Fe 2 O 3 ) is a very stable, economic, low band gap (∼2.1 eV) semiconductor and has been employed for numerous applications [20][21][22][23][24][25]. In addition, it has magnetic applications as well [26][27][28][29].…”