Preparation and characterization of TiO2-masked Fe3O4 nano particles for enhancing catalytic combustion of 1,2-dichlorobenzene and incineration of polymer wastes

Choi, Jin Hee; Youn, Hyun Ki; Kwak, Bu Ho; Wang, Qiang; Yang, Kyung Shik; Chung, Jong Shik

doi:10.1016/j.apcatb.2009.05.026

Cited by 33 publications

(11 citation statements)

References 33 publications

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“…Furthermore, the characteristic peaks of Fe 3 O 4 nearly disappeared in the XPS spectrum of Fe 3 O 4 @SiO 2 and disappeared in the XPS spectrum of P25/Fe 3 O 4 @SiO 2 (3:1). The XPS results confirmed that Fe 3 O 4 was well coated by SiO 2 with the coreshell structure of Fe 3 O 4 @SiO 2[36]. The XPS spectra of Ti, O and Si…”

supporting

confidence: 86%

A new strategy for utilization of NIR from solar energy—Promotion effect generated from photothermal effect of Fe3O4@SiO2 for photocatalytic oxidation of NO

Wang

Dong

et al. 2017

Applied Catalysis B: Environmental

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supporting

confidence: 86%

A new strategy for utilization of NIR from solar energy—Promotion effect generated from photothermal effect of Fe3O4@SiO2 for photocatalytic oxidation of NO

Wang

Dong

et al. 2017

Applied Catalysis B: Environmental

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“…The peaks in the Auger kinetic spectra of 916. 4 The above results indicate that the Cu + species is easier to form over the catalysts synthesized by the UHT protocol, and the increase of manganese content is beneficial for the formation of low valence copper species. The surface copper contents over Cu 0.2 Mn 0.1 Ce 0.7 O x (29.1%) and CuMnCeO x -imp (34.6%) catalysts are higher than those of the theoretical values (that is, 20% and 15%), which indicates that the copper nanoparticles aggregate to some extent.…”

Section: X-ray Photoelectron Spectroscopymentioning

confidence: 77%

“…In the past decades, three types of catalysts, that is, noble metalbased catalysts, transition metal oxide catalysts, and solid acid catalysts [3][4][5], have been studied for the catalytic combustion of CVOCs. Although the noble metal catalysts are catalytically more active at low temperature in comparison with the other metal oxides, the high cost, limited availability, and low resistance to halide such as HCl and Cl 2 , greatly restrict their large-scale application [6,7].…”

Section: Introductionmentioning

confidence: 99%

Catalytic behavior and synergistic effect of nanostructured mesoporous CuO-MnOx-CeO2 catalysts for chlorobenzene destruction

Shen

et al. 2014

Applied Surface Science

104

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a b s t r a c tMesoporous CuO-MnO x -CeO 2 composite metal oxides with different copper and manganese loadings were prepared by a urea-assistant hydrothermal method, and were further adopted for the complete catalytic combustion of chlorobenzene. The effects of reaction conditions such as inlet reagent concentration and water feed concentration on chlorobenzene combustion were also studied. The structure and textural properties of the synthesized catalysts were characterized via the XRD, N 2 adsorption/desorption, FE-SEM, TEM, H 2 -TPR, O 2 -TPD, and XPS techniques. The characterization results reveal that the presence of a small amount of Mn species can facilitate the incorporation of Cu and Mn ions into ceria lattice to form Cu-Mn-Ce-O solid solution. The synergistic effect of Cu and Mn species can reduce the redox potential of the composite catalysts, and produce large amounts of oxygen vacancies in the interface of CuO x , MnO x , and CeO 2 oxides. The catalyst with Cu/Mn atomic ratio of 1/1 exhibits the best chlorobenzene elimination capability, oxidizing about 95% of the inlet chlorobenzene at 264• C with CO 2 selectivity higher than 99.5%. The concentration and mobility of the chemically adsorbed oxygen are vital for the effective removal of surface Cl species, which inhibits the dissociation of oxygen molecules and decreases the reducibility of the copper and manganese species. It can be rationally concluded that the superior catalytic performance and durability of the mesoporous CuO-MnO x -CeO 2 composite oxides are primarily attributed to the higher surface oxygen concentration and better active oxygen mobility.

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“…The preparation of TiO 2 NTs/γ-Fe 2 O 3 composite utilized the principle of isoelectric point method [16]. Two particles with different isoelectric point values show opposite surface charges at pH 6 so that attraction will occur between two particles.…”

Section: 2mentioning

confidence: 99%

Synthesis, characteristics and sonocatalytic activities of calcined γ-Fe2O3 and TiO2 nanotubes/γ-Fe2O3 magnetic catalysts in the degradation of Orange G

Pang

Lim

Ong

et al. 2016

Ultrasonics Sonochemistry

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In this work, γ-Fe2O3 and TiO2 NTs/γ-Fe2O3 composites with good magnetism and sonocatalytic activity were prepared by a facile polyol method and utilize the principle of isoelectric point method, respectively. The structural and magnetic features of the prepared calcined γ-Fe2O3 and composite catalysts were investigated by transmission electron microscopy (TEM), powder X-ray diffraction (XRD), surface analysis, UV-Vis diffuse reflectance spectra (UV-Vis DRS), vibrating sample magnetometry (VSM) and zeta potential analysis. The effects of calcination temperature on γ-Fe2O3 phase variation, physical properties and sonocatalytic properties were investigated. The porosity, specific surface area, band gap energy and sonocatalytic activity of γ-Fe2O3 were gradually decreased with calcination temperature increased. TiO2 NTs/γ-Fe2O3 with appropriate composition and specific structural features possess synergetic effects such as efficient separation of charge carriers and hydroxyl radicals produced by heterogeneous fenton and fenton-like reactions. This enhanced the sonocatalytic activity for the degradation of Orange G under ultrasonic irradiation. The sonocatalytic reactions obeyed pseudo first-order kinetics. All these information provide insight into the design and development of high-efficiency catalyst for wastewater treatment.

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Preparation and characterization of TiO2-masked Fe3O4 nano particles for enhancing catalytic combustion of 1,2-dichlorobenzene and incineration of polymer wastes

Cited by 33 publications

References 33 publications

A new strategy for utilization of NIR from solar energy—Promotion effect generated from photothermal effect of Fe3O4@SiO2 for photocatalytic oxidation of NO

A new strategy for utilization of NIR from solar energy—Promotion effect generated from photothermal effect of Fe3O4@SiO2 for photocatalytic oxidation of NO

Catalytic behavior and synergistic effect of nanostructured mesoporous CuO-MnOx-CeO2 catalysts for chlorobenzene destruction

Synthesis, characteristics and sonocatalytic activities of calcined γ-Fe2O3 and TiO2 nanotubes/γ-Fe2O3 magnetic catalysts in the degradation of Orange G

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