Characterization and catalytic activity of CuFeZSM-5 catalysts for oxidative degradation of Rhodamine 6G in aqueous solutions

Abstract

This study presents an evaluation of the catalytic performances of Fe and Cu containing ZSM-5 zeolites for oxidation of Rhodamine 6G. Fe and Cu were loaded by ion exchange or through hydrothermal synthesis. The catalytic process was carried out in an aqueous solution using H2O2 as an oxidant. The catalyst prepared by hydrothermal synthesis showed the highest activity (100% decolorization, 59.1% aromatic degradation and 51.8% TOC removal at initial pH of 3.5). This catalyst was stable against leaching even at low pH. The change in activity of the catalysts prepared was attributed to incorporation of the Fe and Cu species with ZSM-5. Fe and Cu were in structural locations - in the framework - in the catalyst prepared by hydrothermal synthesis while there were extraframework cations or species in catalysts prepared by ion exchange. Incoporation of Cu into FeZSM-5 increased its catalytic activity. © 2010 Elsevier B.V. All rights reserved.TÜBİTAK and NASU project number 107M62

A heterogeneous Fenton-like system with nanoparticulate zero-valent iron for removal of 4-chloro-3-methyl phenol

“…An important observation here revealed that at solution original pH of 6.1, the complete degradation of CMP was obtained within 15 min of reaction. The activity of nZVI in the neutral pH range is higher than that of many reported heterogeneous Fenton-like catalysts [4,10,12,38,39]. Thus, no or less pH adjustment of the medium is needed for effective oxidation over the wider pH range, which is an important advantage for application.…”

Heterogeneous Fenton-like degradation of Rhodamine 6G in water using CuFeZSM-5 zeolite catalyst prepared by hydrothermal synthesis

“…The precise procedures for preparation and characterization of the catalysts were described in Ref. [24]. Metal contents and Si/Fe ratios of the catalysts were determined by ICP-AES method.…”

Self-sustained combustion of carbon monoxide promoted by the Cu-Ce/ZSM-5 catalyst in CO/O 2 /N 2 atmosphere

“…The reason for this may be that copper and cerium species cover the external surface of ZSM-5, blocking a number of zeolite channels, and impeding entry of N 2 into the pores. XRD patterns ( No diffraction peaks attributed to either copper or cerium oxides are observed, which suggests that the copper and cerium species are well dispersed on the ZSM-5 support [15,16].…”