Mesoporous bimetallic Fe/Co as highly active heterogeneous Fenton catalyst for the degradation of tetracycline hydrochlorides

Abstract

Mesoporous bimetallic Fe/Co was prepared as a Fenton-like catalyst to degrade the tetracycline hydrochlorides (TC). The nanocasting strategy with KIT-6 as a hard template was carried out to synthesize the mesoporous bimetallic catalyst. The mesoporous bimetallic Fe/Co catalyst was characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), nitrogen adsorption-desorption isotherms, and Brunauer-Emmett-Teller (BET) method. The results showed that the catalyst has significant nanofeatures; the surface area, pore size, and particle size were 113.8 m2g−1, 4 nm, and 10 nm, respectively. In addition, the effects of the operating parameters, such as the iron-to-cobalt ratio, pH, H2O2, and initial TC concentrations on its catalytic performance were investigated. The best operating parameters were as follows: iron-to-cobalt ratio = 2:1 to 1:1, pH = 5–9, H2O2: 30 mmol, initial TC less than 30 mg/L. Furthermore, the mesoporous bimetallic Fe/Co showed a good performance for degrading TC, achieving a removal rate of 86% of TC after 3 h under the reaction conditions of H2O2 = 30 mmol, mesoporous bimetallic Fe/Co = 0.6 g/L, TC = 30 mg/L, pH = 7.0, and temperature = 25.5 °C. The mesoporous bimetallic Fe/Co catalyst shows good stability and reusability. This work demonstrated that mesoporous bimetallic Fe/Co has excellent catalytic efficiency, smaller amounts of leached ions, and wider pH range, which enhance its potential applications.

Itaconate regulates macrophage function through stressful iron‐sulfur cluster disrupting and iron metabolism rebalancing

“…As described above, iron metabolism is an essential host regulatory mechanism in itaconate‐stimulated macrophages. Free iron participates in Fenton reactions, promoting the formation of ROS 23 . Surprisingly, the addition of iron chelators (deferoxamine, 2ʹ2‐Dipyridyl, dexrazoxane HCl) did not inhibit IL‐1β secretion; instead, it promoted IL‐1β secretion and caspase‐1 activation (Figure 5A,E).…”

“…Free iron participates in Fenton reactions, promoting the formation of ROS. 23 Surprisingly, the addition of iron chelators (deferoxamine, 2ʹ2-Dipyridyl, dexrazoxane HCl) did not inhibit IL-1β secretion; instead, it promoted IL-1β secretion and caspase-1 activation (Figure 5A,E). In contrast, high concentrations of ferric citrate (FAC) and ferrous sulfate also increased IL-1β secretion in itaconate-stimulated macrophages (Figure 5B,E).…”

Análise Do Escoamento Turbulento Em Torneira Bica Alta Por Meio Da Fluidodinâmica Computacional

“…Além desses, a utilização de cobalto também tem sido investigado e apresentado potencial significativo para aplicação em sistemas Fenton (Junfeng Wen et al, 2021), (J. Li et al, 2019) e (X. Li et al, 2015).…”

Enhanced Heterogeneous Fenton-like Process for Sulfamethazine Removal via Dual-Reaction-Center Fe-Mo/rGO Catalyst

“…To avoid these disadvantages, a novel dual-reaction-center mechanism was proposed to solve the rate-limiting step by generating non-uniform electron distribution on the surface of heterogeneous Fenton-like catalysts [ 9 , 10 ]. For example, Hu et al prepared a dual-reaction-center CuTiAl-SiO 2 nanocatalyst to destroy hazardous pollutants [ 7 ].…”