Synthesis of akageneite (beta-FeOOH)/reduced graphene oxide nanocomposites for oxidative decomposition of 2-chlorophenol by Fenton-like reaction

Abstract

h i g h l i g h t s• Ak/rGO was successfully prepared by co-precipitating and reduction processes.• Fe O C band inhabited the reduction of graphene oxide.• Degradation rate of 2-chlorophenol for Ak/rGO increased 2-5 times than that for Ak.• Higher removal rate is due to the syn- In this work, the composite of reduced graphene oxide and akageneite (Ak/rGO) was synthesised by co-precipitating and reduction processes. The morphological and structural features of the synthesized composites (Ak/rGO) were characterized by XRD, SEM, BET, FTIR, Zeta potential and XPS. The results revealed that (1) beta-FeOOH was successfully loaded on the reduced graphene oxide (rGO); (2) the presence of strong interfacial interactions (Fe O C bonds) between rGO and beta-FeOOH was observed; (3) the reduction of graphene oxide may be inhabited in the formation process of beta-FeOOH, producing rGO sheets rather than rGO sphere. In the heterogeneous Fenton-like reaction, the degradation rate constants of 2-chlorophenol (2-CP) increased 2-5 times after the addition of rGO probably due to the Fe O C bond. The increase of the content of rGO could contribute to the removal of 2-CP, due to the synergy of catalysis and 2-CP adsorption towards Ak/rGO. In this study, the Ak/rGO composite has exhibited great potential and significant prospects for environmental application.

Multiwalled carbon nanotube-supported CuCo2S4 as a heterogeneous Fenton-like catalyst with enhanced performance

“…10 To overcome these negative effects, recyclable heterogeneous catalysts like metal oxides, hydroxides and suldes have been used to replace homogeneous catalysts. [11][12][13][14][15][16] Since then, enormous progress has been made in heterogeneous catalysis; however, most catalysts still show stability issues at certain values of pH, particularly under strong alkaline conditions. Hence, it is necessary to prepare other types of catalysts with a high catalytic activity and a wide applicable pH range.…”

Fe Oxides Loaded on Carbon Cloth by Hydrothermal Process as an Effective and Reusable Heterogenous Fenton Catalyst

“…X-ray diffraction patterns ( Figure S1) did not show any specific diffraction peaks of Fe oxides, which could be explained by the high dispersity of the Fe oxides particles and the relatively low Fe loading content (around 1.5% determined by ICP-9000) [22]. The XPS (X-ray photoelectron spectroscopy) spectra of Fe@CC were shown in Figure 1.…”

Renewable Material-derived Biochars for the Efficient Removal of 2,4-Dichlorophen from Aqueous Solution: Adsorption/Desorption Mechanisms

“…Similarly, the peak that appeared at 1383 cm -1 to 1449 cm -1 was a methylene stretching that linked to the C−C groups in the BCs. The FTIR results revealed that the different BCs had different functional groups, which could be attributed to the biochar species (Xiao et al 2016). The biochar properties considerably affect the interactions between 2,4-DCP and the functional groups during the sorption process (Cui et al 2016).…”

“…It is extensively used to control insects and weeds globally (Peng et al 2016). The excessive use of chlorophenols leads to the pollution of surface water, underground water, air, and agricultural fields (Shih et al 2012;Xiao et al 2016). Vlastos et al (2016) reported that 2-chlorophenol (only one Cl element) with the concentrations up to 1 μg mL -1 could cause chronic toxicity to microbes and fish.…”