The constraints of transition metal substitutions (Ti, Cr, Mn, Co and Ni) in magnetite on its catalytic activity in heterogeneous Fenton and UV/Fenton reaction: From the perspective of hydroxyl radical generation

Zhong, Yuanhong; Liang, Xiaoliang; Zhu, He; Tan, Wei; Yuan, Peng; He, Hongping

doi:10.1016/j.apcatb.2014.01.007

Cited by 134 publications

(70 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Co-substituted magnetite samples were synthesized using magnetite (Fe 3 O 4 ) and cobalt chloride (CoCl 2 ) by a precipitationoxidation routine [4,5]. The resultant samples were labeled S 0.25 , S 0.50 , S 0.75 , and S 1.0 , corresponding to the initial Co doping amounts (x) in Fe 3-x Co x O 4 of 0.25, 0.50, 0.75, and 1.0, respectively.…”

Section: Preparation Of Magnetite Samplesmentioning

confidence: 99%

See 1 more Smart Citation

Quantitative analysis of Fe and Co in Co-substituted magnetite using XPS: The application of non-linear least squares fitting (NLLSF)

Wei

et al. 2016

Applied Surface Science

110

View full text Add to dashboard Cite

Section: Preparation Of Magnetite Samplesmentioning

confidence: 99%

“…substituted magnetite because of its surface catalytic properties [1][2][3][4][5]. For example, the catalytic activities of magnetite in the heterogeneous Fenton reaction are greatly improved by the introduction of Mn [6], V [7], and Co [3].…”

Section: Introductionmentioning

confidence: 99%

Quantitative analysis of Fe and Co in Co-substituted magnetite using XPS: The application of non-linear least squares fitting (NLLSF)

Wei

et al. 2016

Applied Surface Science

110

View full text Add to dashboard Cite

“…• OH radicals generated in heterogeneous photo-Fenton processes were trapped with dimethyl sulfoxide (DMSO) to produce formaldehyde quantitatively, and then reacted with 2,4-dinitrophenylhydrazine (DNPH) to form hydrazone (DNPH o ), which were analyzed by high performance liquid chromatography (HPLC) [35]. Furfur alcohol (FFA, 10 −4 mol/L) was used as 1 O 2 acceptor [36,37], and the residual concentration of FFA was determined by HPLC.…”

Section: Analysis Of Reactive Speciesmentioning

confidence: 99%

“…The details of analysis procedure were described according to the paper of Zhong et al [35] and Zhang et al [36].…”

Section: Analysis Of Reactive Speciesmentioning

confidence: 99%

Fullerol modification ferrihydrite for the degradation of acid red 18 under simulated sunlight irradiation

Liu

Zhou

et al. 2016

Journal of Molecular Catalysis A: Chemical

Self Cite

View full text Add to dashboard Cite

“…23 22 [33,[43][44][45][46][47][48][49] and FeOOH [50][51][52]. Among these iron oxides and/ or iron hydroxides, the inverse spinel Fe3O4 has been found to work efficiently as a heterogeneous catalyst in the heterogeneous Fenton-like reaction, based on its high Fenton activity [46,53,54]. This is due to the fact that the Fe3O4 possesses several unique features [46,[55][56][57][58] on the octahedral sites allowing the iron species to be reversibly oxidised and reduced without structural change; and (iv) the iron ions in the spinel structure of Fe3O4 can be isomorphically substituted with several transition metals which have various redox properties altering the catalytic properties of the resulting materials.…”

Section: Heterogeneous Fenton-like Reactionmentioning

confidence: 99%

Graphene oxide-iron oxide nanocomposites for dye contaminated wastewater remediation

Zubir¹

View full text Add to dashboard Cite

The development of active and stable heterogeneous Fenton-like catalysts have emerged as an alternative to overcome the practical limitations related to the homogeneous Fenton catalyst, where various iron species and/or iron oxides are immobilised within the structure of different catalyst supports. Clay, alumina, zeolite and carbonaceous materials such as activated carbon and carbon nanotubes have been used as catalyst supports of choice by the scientific community. However, there is a knowledge gap associated with using high aspect ratio 2D (dimension) graphene oxide (GO) as an alternative catalyst support. Of particular interest, it is postulated that the structure and functionalities of GO as a support confers to the resultant catalyst overall catalytic activity beyond the conventional Fenton catalysts. In this thesis, the structural and physicochemical properties of resultant catalyst with their corresponding catalytic activity were systematically investigated. To this end, the synergistic interaction between GO and immobilised iron oxide nanoparticles (Fe3O4 NPs) was proposed for an oxidative degradation of synthetic dye acid orange 7 (AO7), which is a major water pollutant from textile production.The GO-Fe3O4 nanocomposites were initially synthesised through a facile one-pot method by coprecipitating irons salts onto GO sheets in a basic solution. The formation of GO-Fe3O4 was postulated as follows: (i) Fe 3+ / Fe 2+ ions are adsorbed and coordinated by the carboxyl groups (C=O) of GO sheets, (ii) hydrolysed ions form nanoclusters on GO sheets when NaOH is introduced, (iii) followed by condensation of the nanoclusters to form Fe3O4 nuclei, and (iv) further nucleation and growth of Fe3O4 crystallites on GO sheets were due to the redox reaction as the pH is increased to 10. The incorporation of GO led to an enhancement on the catalytic activity of the nanocomposites with 76% AO7 removal over the control catalysts of Fe3O4 NPs and GO sheets, which corresponds to 48 and 22%, respectively.Further improvements on the catalytic activity of GO-Fe3O4 were performed by modifying the synthesis through pre-hydrolysing iron salts prior to GO addition at pH 4 with various GO loadings.The key finding of this new method is the formation of two sets of different mesoporous structure.At low GO loadings 10 wt%, GO-Fe3O4 nanocomposites resulted in high surface area up to 409 m 2 g -1 , in tandem with high 92-98% degradation of AO7. By contrast, GO loadings 10 wt% led to reduced surface area and lower GO-Fe3O4 activity (60%). The presence of strong interfacial interactions (Fe-O-C bonds) in the nanocomposites contributed to the superior degradation of AO7, in tandem with structural-morphological features.iiiThe operational conditions of heterogeneous Fenton-like reaction were evaluated and modelled as a function of nanocomposites dosage, pH, temperature, oxidant and dye concentrations. Best results showed a fast 80% degradation in ~20 min, whilst ~98% of AO7 was successfully removed after 180 min of reaction time. O...

show abstract

The constraints of transition metal substitutions (Ti, Cr, Mn, Co and Ni) in magnetite on its catalytic activity in heterogeneous Fenton and UV/Fenton reaction: From the perspective of hydroxyl radical generation

Cited by 134 publications

References 37 publications

Quantitative analysis of Fe and Co in Co-substituted magnetite using XPS: The application of non-linear least squares fitting (NLLSF)

Quantitative analysis of Fe and Co in Co-substituted magnetite using XPS: The application of non-linear least squares fitting (NLLSF)

Fullerol modification ferrihydrite for the degradation of acid red 18 under simulated sunlight irradiation

Graphene oxide-iron oxide nanocomposites for dye contaminated wastewater remediation

Contact Info

Product

Resources

About