Degradation of bisphenol-a using a sonophoto Fenton-like hybrid process over a LaFeO$_{3}$ perovskite catalyst and a comparison of its activity with that of a TiO$_{2}$ photocatalyst

Abstract

Oxidation of bisphenol-A (BPA) was investigated using a sonophoto Fenton-like hybrid process under visible light irradiation in the presence of iron-containing perovskite LaFeO 3 catalysts. For this purpose, firstly the perovskite catalyst (LaFeO 3) was prepared by the sol-gel method and calcined at different temperatures (500, 700, and 800 • C). The prepared catalysts were characterized using XRD, SEM, FTIR, nitrogen adsorption, UV-vis DRS, and ICP/OES measurements. Among the prepared catalysts the catalyst that was calcined at 500 • C showed better catalytic activity with respect to degradation and chemical oxygen demand (COD) reduction (of 21.8% and 11.2%, respectively, after 3 h of reaction duration) than the other catalysts calcined at 700 • C and 800 • C. The catalytic activity of the LaFeO 3 perovskite catalyst calcined at 500 • C was compared with that of a TiO 2 photocatalyst containing Fe and prepared by the sol-gel method. Better photocatalytic activity in terms of degradation of BPA, total organic carbon (TOC), and COD reductions was observed with the LaFeO 3 perovskite catalyst under visible light. The degradation, COD, and TOC reductions after 6 h of oxidation were 34.8%, 26.9%, and 8.8% for the LaFeO 3 perovskite catalyst, and 33.1%, 19.7%, and 4.9% for the Fe/TiO 2 catalyst, respectively.

Graphene‐supported LaFeO 3 for photocatalytic hydrogen energy production

“…In the literature, it is stated that the BET surface area of LaFeO 3 catalyst calcined at 700 C is found as 3.61 m 2 g −1 , which is lower than LFO and GLFO catalysts, which were synthesized in this study. 32 Moreover, it has been found that the surface area of LFO increased by introduction of graphene. LFO and GLFO possessed pore sizes of 5.46 and 5.03 nm, respectively.…”

Thermocatalytic membrane distillation for clean water production

“…For instance, by setting T F1 to 54.0°C, the feed temperature after leaving the module (T F2 ) is 40.0 and 48.4°C for cross-flow velocities of 0.028 and 0.078 m s −1 , respectively. In general, high cross-flow velocities are beneficial to preserve a water vapor pressure gradient across the membrane by reducing temperature drop from inlet to outlet of the filtration module and by mitigating temperature polarization at the membrane surface [37][38][39][40][41][42][43][44][45] . This results in higher water permeation rates (Fig.…”

Modeling and optimization of simultaneous degradation of rhodamine B and acid red 14 binary solution by homogeneous Fenton reaction: a chemometrics approach

“…The optimized concentration profiles were used to calculate the responses of each experiment using Eq. (8).…”

“…Fenton's oxidation reaction is one of the most cost-effective AOP methods which uses ferric ions to catalyze the generation of hydroxyl radical for subsequent mineralization organic materials to CO 2 , H 2 O and light-weight organic acids (Eq. (1) and (2)) [7][8][9]. F e 2+ + H 2 O 2 → F e 3+ + OH • + OH − (1) OH • + Organic Compounds → Degradation P roducts (2) Fenton process was affected by various parameters such as the concentration of respective catalysts, concentration of hydrogen peroxide, initial pH value of the solution, temperature, mixing rate and other operational parameters that require the implementation of an optimization strategy to obtain desirable results [10,11].…”