Preparation of copper doped magnetic porous carbon for removal of methylene blue by a heterogeneous Fenton-like reaction

Abstract

High-specific-surface-area copper doped magnetic porous carbon (CuFe 2 O 4 /Cu@C) was fabricated by annealing iron, copper and 1,3,5-benzenetricarboxylic ([Cu/Fe]-BTC) metal-organic coordination polymers, which were prepared via a one-pot solvothermal method. The novel CuFe 2 O 4 /Cu@C catalyst consists of Cu (3.80%), CuFe 2 O 4 (64.84%), and C (31.36%). Scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, elemental analysis, inductively coupled plasma, Brunauer-Emmett-Teller surface area measurement, and vibrating sample magnetometer analysis were used to characterize the materials. The as-prepared materials were employed as a heterogeneous Fenton's reagent with the addition of H 2 O 2 for degradation of methylene blue (MB). The results showed that the materials effectively catalyzed H 2 O 2 to generate hydroxyl radicals (cOH). And due to their magnetism, the materials can be easily separated from wastewater to achieve repeatability. It also turned out that CuFe 2 O 4 /Cu@C had a higher catalytic activity than Fe 3 O 4 @C, which proved the importance of copper doped into the catalyst.This work indicated that porous carbon composites provide good support for the development of a highly efficient heterogeneous Fenton catalyst, which is useful for environmental pollution cleanup.

Simple and Controllable Synthesis of High-Quality MnTiO3 Nanodiscs and Their Application as A Highly Efficient Catalyst for H2O2-Mediated Oxidative Degradation

“…According to the linear relationships between–ln­( c t / c 0 ) and t at different temperatures, we calculated the rate constants k values from the slopes of the straight lines, and the results are shown in inset of Figure b. Under similar conditions, the rate constant of MnTiO 3 nanodiscs (e.g., 0.16849 min –1 at 30 °C) is also much higher than those of many previously reported catalysts such as MPCMS-500 (0.1058 min –1 ), W–Fe/meso-C (0.0159 min –1 ), CuFe 2 O 4 /Cu@C (0.10942 min –1 ), and Fe 3 O 4 /SiO 2 /C (0.12 min –1 ), which further indicates the high catalytic efficiency of MnTiO 3 nanodiscs. Furthermore, the activation energy ( E a ) was also calculated from the plots of ln k against 1/ T according to the Arrhenius equation .…”

MoS2/FeS Nanocomposite Catalyst for Efficient Fenton Reaction

“…Further increasing their dosage to 25 and 40 mM decreased the degradation efficiency to 80.7 and 74.6% because of the self-quenching of • OH by excess H 2 O 2 (eq 6). 31,32 Degradation efficiencies monotonously increased with increased dosages of MoS 2 /FeS from 2.0 to 15 mg (Figure S5b). At 10 min, the degradation efficiencies were 8.8, 39.5, 62.8, and 97.1% in the presence of 2.0, 5.0, 10, and 15 mg of catalysts, respectively.…”

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

“…In our literature survey [27][28][29][30], in addition to Fe, other multiple redox state elements such as, cerium (Ce), manganese (Mg), chromium (Cr), copper (Cu) and cobalt (Co) can react with H2O2 to generate • OH in the Fenton-like process. Especially, Cu attracted our research interest as a substituting cation due to its advantageous features over Fe [31][32][33][34][35][36]. For example, Cu endows high reducibility; the reduction of Cu(II) by H2O2 occurs more easily than that of…”