Fe-Cu Doped Multiwalled Carbon Nanotubes for Fenton-like Degradation of Paracetamol Under Mild Conditions

Abstract

A series of carbon nanotubes doped with Fe and/or Cu, Fe100−xCux/CNT (x = 0, 25, 50, 75 and 100) has been prepared by an easy method of wetness impregnation of commercial multiwalled carbon nanotubes previously oxidized with nitric acid. The wide characterization of the solids by different techniques demonstrates that the incorporation of Fe and Cu to the CNTs has been successfully produced. Fe100−xCux/CNT samples were tested as catalysts in the removal of paracetamol from aqueous solution by a combined process of adsorption and Fenton-like oxidation. Under mild conditions, 25 °C and natural pH of solution, i.e., nearly neutral, values of oxidation of paracetamol between 90.2% and 98.3% were achieved after 5 h of reaction in most of cases. Furthermore, with the samples containing higher amounts of copper, i.e., Cu100/CNT and Fe25Cu75/CNT, only 2 h were necessary to produce depletion values of 73.2% and 87.8%, respectively. The influence of pH and dosage of H2O2 on the performance has also been studied. A synergic effect between both Cu+/Cu2+ and Fe2+/Fe3+ in Fenton-like reaction was observed. These results demonstrate that Fe100−xCux/CNT are powerful Fenton-like catalyst for degradation of paracetamol from aqueous solution and they could be extended to the removal of other organic pollutants.

Synthesis of Substituted Pyrimido[1,2‐b]indazoles through (3+2+1) Cyclization of 3‐Aminoindazoles, Ketones, and N,N‐Dimethylaminoethanol as One‐Carbon Synthon

“…Based on the above control experiments as well as our previous reports, [14][15][16] a plausible reaction mechanism is proposed as shown in Scheme 4. Initially, DMEA coordinates with Fe 3 + by the nitrogen and oxygen atoms and performs a Fenton-like reaction [24] in the presence of oxygen to generate a radical cation E and superoxide radical anion. Removal of one proton from cation E gives a reactive iminium F. At the meantime, condensation of 1 a and 2 a in the presence of a Lewis acid such as FeCl…”

Progress in the design of nanoporous adsorbent materials containing transition metals for the removal of contaminants of emerging concern

“…There are several techniques that can be utilized for the effective incorporation of transition metals onto an adsorbent structure, including wetness impregnation [45][46][47], spontaneous monolayer dispersion [45,48], grafting [49][50][51][52][53], and ion exchange [54][55][56][57]. Among these, grafting and ion exchange have produced better results with respect to water-stability and loading of metal.…”

A Detailed Insight into the Effects of Morphologies of Cerium Oxide on Fenton‐like Reactions for Different Applications

“…The use of Fe 2 + /Fe 3 + and Cu + /Cu 2 + to catalyze the Fenton reaction is a more classic example. [8][9][10][11] However, the practical applications of these Fenton reagents are limited by high solubility that leads to the accumulation of metal ions and consequently causes biotoxicity and the accumulation of metal sludge in the environmental treatment process. [12,13] To address these problems, many efforts have been made to develop other effective Fenton/Fenton-like reagents.…”