Sonocatalytic performance of Er3+:YAlO3/TiO2–Fe2O3 in organic dye degradation

Gao, Jingqun; Jiang, Renzheng; Wang, Jun; Wang, Baoxin; Li, Kai; Kang, Peng; Liu, Ying; Zhang, Xiangdong

doi:10.1016/j.cej.2011.01.079

Cited by 34 publications

(12 citation statements)

References 26 publications

(38 reference statements)

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“…11. Gao et al [7] and Moshaii et al [45] claimed that ultrasound centers for electron-hole pairs [9], causing the reduction efficiency of electron-hole separation.…”

Section: Possible Mechanismsmentioning

confidence: 98%

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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“…11. Gao et al [7] and Moshaii et al [45] claimed that ultrasound centers for electron-hole pairs [9], causing the reduction efficiency of electron-hole separation.…”

Section: Possible Mechanismsmentioning

confidence: 98%

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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“…The maximum saturation magnetization (M S ) of the FS, FST, and FST-N NCPs were measured 17.35, 4.26, and 3.68, respectively. As there were no Fe 2 O 3 characteristic peaks (2θ = 24.28°,33.26°, 35.76°, 41.10°, 49.58°, and 54.20°) (Gao et al 2011) observed in the XRD patterns of FST and FST-N NCPs, the decrease of the magnetic saturation of the FS core could be attributed to the contribution of the volume of the non-magnetic coating layer to the total sample volume. No hysteresis phenomenon was found, and the obtained remanent magnetization (M r ) and coercivity (H C ) of the magnetic samples were negligible and close to zero, indicating the superparamagnetic behavior of the synthesized NCPs at room temperature.…”

Section: Vsm Analysismentioning

confidence: 93%

Efficient photocatalytic degradation of organic pollutants by magnetically recoverable nitrogen-doped TiO2 nanocomposite photocatalysts under visible light irradiation

Hamzezadeh-Nakhjavani

Tavakoli

Akhlaghi

et al. 2015

Environ Sci Pollut Res

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Preparation of novel nanocomposite particles (NCPs) with high visible-light-driven photocatalytic activity and possessing recovery potential after advanced oxidation process (AOP) is much desired. In this study, pure anatase phase titania (TiO2) nanoparticles (NPs) as well as three types of NCPs including nitrogen-doped titania (TiO2-N), titania-coated magnetic silica (Fe3O4 cluster@SiO2@TiO2 (FST)), and a novel magnetically recoverable TiO2 nanocomposite photocatalyst containing nitrogen element (Fe3O4 cluster@SiO2@TiO2-N (FST-N)) were successfully synthesized via a sol-gel process. The photocatalysts were characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, field emission scanning electron microscopy (FE-SEM) with an energy-dispersive X-ray (EDX) spectroscopy analysis, X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectroscopy (DRS), and vibrating sample magnetometer (VSM). The photocatalytic activity of as-prepared samples was further investigated and compared with each other by degradation of phenol, as a model for the organic pollutants, in deionized (DI) water under visible light irradiation. The TiO2-N (55 ± 1.5%) and FST-N (46 ± 1.5%) samples exhibited efficient photocatalytic activity in terms of phenol degradation under visible light irradiation, while undoped samples were almost inactive under same operating conditions. Moreover, the effects of key operational parameters, the optimum sample calcination temperature, and reusability of FST-N NCPs were evaluated. Under optimum conditions (calcination temperature of 400 °C and near-neutral reaction medium), the obtained results revealed efficient degradation of phenol for FST-N NCPs under visible light irradiation (46 ± 1.5%), high yield magnetic separation and efficient reusability of FST-N NCPs (88.88% of its initial value) over 10 times reuse.

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“…Nevertheless, the ultravoilet-light in solar spectrum is less than 5.0%. In order to obtain a photocatalyst being capable of responding to visible-light, we have been engaged in the research of TiO 2 combined with some up-conversion luminescence agents to perform the simulated visible-light photocatalytic degradation of pollutants and achieved some satisfactory results in the past few years [28][29][30][31][32]. The high degradation effect can be attributed to some special properties of the up-conversion luminescence agents, which can generate one high-energy photon by absorbing two or more incident low-energy photons.…”

Section: Introductionmentioning

confidence: 99%

Sol–gel-hydrothermal synthesis of Er3+:Y3Al5O12/Pt–TiO2 membrane and visible-light driving photocatalytic hydrogen evolution from pollutants

Ma¹,

Li²,

Yang³

et al. 2015

Applied Catalysis A: General

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Sonocatalytic performance of Er3+:YAlO3/TiO2–Fe2O3 in organic dye degradation

Cited by 34 publications

References 26 publications

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

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

Efficient photocatalytic degradation of organic pollutants by magnetically recoverable nitrogen-doped TiO2 nanocomposite photocatalysts under visible light irradiation

Sol–gel-hydrothermal synthesis of Er3+:Y3Al5O12/Pt–TiO2 membrane and visible-light driving photocatalytic hydrogen evolution from pollutants

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