Heterogeneous photo-Fenton degradation of organics using highly efficient Cu-doped LaFeO3 under visible light

Abstract

Highlights  Cu-doped LaFeO3 was studied as catalyst for Fenton-degradation of organics  It was much more effective in degrading organic compared with undoped LaFeO3  The mechanism for photo-Fenton degradation was studied  Its application was optimized in terms of solution pH, H2O2 and catalyst dosage  The excellent stability and reusability suggested its potential for practical use

Activity enhancement pathways in LaFeO3@TiO2 heterojunction photocatalysts for visible and solar light driven degradation of myclobutanil pesticide in water

“…4D). The LFO surface is also characterized by the broad multi-contribution envelope of the O 1s core orbital spectra, in agreement with the literature [65], and with a main contribution at 528.8 eV assigned to lattice oxygen species [66,67]. Regarding the TiO2 reference, the Ti 2p spectra shows the usual doublet related to the Ti 2p3/2-Ti 2p1/2 spin-orbit components of octahedral symmetry Ti 4+ (Ti-O) in a typical TiO2 crystalline structure, at 458.6 eV and 464.3 eV respectively, with no contribution attributed to Ti 3+ species, indicating the presence of few surface defects [68][69][70].…”

Ferrite Materials for Photoassisted Environmental and Solar Fuels Applications

“…Lately, the research has been moved towards the material modification taking into account the composition of a ferrite and its ability to exchange A or B cation and so to tune its catalytic properties. In this scenario, recently the last trend has been the doping of the materials with transition metals [31,44,97,107,108]. ZnxFe3-XO4 materials were synthesized by a soft chemical route by Mandal et al [97].…”

Adsorption and photo-Fenton catalytic degradation of organic dyes over crystalline LaFeO3-doped porous silica

“…8,62 The cOH radical is considered as a strong oxidizing agent because of its standard redox potential (+2.8 V), which could oxidize most of the dyes to the mineral end-products. 63 Meanwhile, HPS-0.15LFO can absorb visible light to produce photogenerated electron-hole pairs (eqn (11)); 64 the electron is trapped by H 2 O 2 to generate highly reactive cOH (eqn (12)) and the hole is also an important active species to directly mineralize organic (eqn (14)). 62 Note that the role of h + in oxidation process of organics has so far remained inconclusive.…”

“…The literature suggests that LaFeO 3 (LFO), as a member of the group of perovskite materials, could be a promising heterogeneous catalyst in the photo-Fenton degradation of pollutants. [10][11][12][13] In the photo-Fenton reaction, the pollutant is believed to be oxidized and degraded by the attack of the hydroxyl radicals; thereby it is necessary to increase the number of active sites on the catalyst surface and in turn enhance the contact area between the pollutant and the catalyst towards the optimization of pollutant removal. However, LFO crystals synthesized via the traditional sol-gel method normally possess small specic surface area, show no porosity and therefore have a limited amount of active sites for catalytic degradation, 10,14 due to the high temperature usually used in the synthesis.…”