Efficient photocatalytic degradation of acid fuchsin in aqueous solution using separate porous tetragonal-CuFe2O4 nanotubes

Jing, Panpan; Li, Jianan; Pan, Lining; Wang, Jianbo; Sun, Xiaojun; Liu, Qingfang

doi:10.1016/j.jhazmat.2014.11.015

Cited by 76 publications

(25 citation statements)

References 51 publications

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“…Therefore, both of the pure SrTiO 3 and pure NiFe 2 O 4 are prepared without any other additives by the single-spinneret electrospinning. 24 In regard to the SrTiO 3 /NiFe 2 O 4 composites (Fig. After evenly blending their precursor-sols of the above two pure samples followed by the same preparation process, the signals of perovskite SrTiO 3 and inverse spinel NiFe 2 O 4 are tracked together in the XRD pattern of the obtained sample shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…20,21 Out of the numerous semiconductor photocatalysts, strontium titanate (SrTiO 3 ) is a promising candidate for the photocatalytic technique because of its high catalytic activity, strong photo-corrosion resistibility and good structural stability. 24 Moreover, recycling is another consideration for evaluating an ideal photocatalyst. 24 Moreover, recycling is another consideration for evaluating an ideal photocatalyst.…”

Section: Introductionmentioning

confidence: 99%

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Hierarchical SrTiO₃/NiFe₂O₄ composite nanostructures with excellent light response and magnetic performance synthesized toward enhanced photocatalytic activity

Jing

Wang

et al. 2015

Nanoscale

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Being capable of gathering advanced optical, electrical and magnetic properties originating from different components, multifunctional composite nanomaterials have been of concern increasingly. Herein, we have successfully demonstrated the preparation of SrTiO3/NiFe2O4 porous nanotubes (PNTs) and SrTiO3/NiFe2O4 particle-in-tubes (PITs) via a single-spinneret electrospinning and a side-by-side-spinneret electrospinning, respectively. The products were characterized by using scanning electron microscopy, transmission electron microscopy, X-ray diffraction, UV-visible diffuse reflectance spectra and a vibrating sample magnetometer in detail. The results indicate that SrTiO3/NiFe2O4 PNTs are the heterojunction nanotubes by connecting perovskite SrTiO3 and spinel NiFe2O4 nanoparticles, but SrTiO3/NiFe2O4 PITs are the self-assembled core/shell structures by embedding SrTiO3 nanoparticles into NiFe2O4 nanotubes. Compared with pure SrTiO3 nanofibers, the two SrTiO3/NiFe2O4 composites exhibit a powerful light response and excellent room temperature ferromagnetism. The magnetic separations directly reveal that such amazing recycling efficiencies of about 95% for SrTiO3/NiFe2O4 PNTs and about 99.5% for SrTiO3/NiFe2O4 PITs are obtained. Furthermore, both the magnetic composites perform considerable photocatalytic activity in the degradation of rhodamine B. We propose that Kirkendall-diffusion and phase-separation are probably responsible for the formation of SrTiO3/NiFe2O4 PITs, and this work could provide a feasible way to assemble the core/shell structures of different materials.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hierarchical SrTiO₃/NiFe₂O₄ composite nanostructures with excellent light response and magnetic performance synthesized toward enhanced photocatalytic activity

Jing

Wang

et al. 2015

Nanoscale

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“…After that, a lot of superoxide radicals (O 2•− ) and hydroxyl radicals (OH • ) are formed. These produced active radicals react with the ionized MG molecules to decompose them into the harmless H 2 O, CO 2 , and mineral acids (NO 2− , NO 3− , or SO4 2− ) [37,[41][42][43][44]; during this step, partial strong oxidizing holes (h +) can also directly participate in the decomposition of the MG molecules. According to the results obtained, the self decomposition of MG molecules is very negligible.…”

Section: Mechanism Of Photocatalytic Activitymentioning

confidence: 99%

Green and chemical-engineered CuFe2O4: characterization, cyclic voltammetry, photocatalytic and photoluminescent investigation for multifunctional applications

Surendra¹,

Veerabhdraswamy

Anantharaju

et al. 2018

J Nanostruct Chem

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CuFe 2 O 4 nanoparticles (CNPs) with cubic and tetragonal spinel structures were synthesized by Jatropha oil-assisted green combustion route (GCR) and urea-assisted chemical combustion route (CCR) and well-characterized. The photocatalytic activity of CNPs prepared via GCR and CCR showed 96 and 83% sunlight degradation of Malachite green (MG) dye, respectively. Electrochemical properties of CNPs were studied by means of Cyclic Voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The current research work pledges to provide some novel insights into the design of material for multifunctional long-term applications for environmental clean-up.

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“…The “shake‐up” satellites at 941.7 eV and 961.8 eV in the Cu 2p XPS spectrum (Figure a) are characteristic for Cu 2+ , confirming the presence of Cu 2+ . Several literatures have reported different results for the Cu XPS spectrum in spinel‐type CuFe 2 O 4 , some containing only Cu 2+[3e,3f,18] while some containing both Cu 2+ and Cu + . In order to determine the valences of Cu species in CuFe 2 O 4 and CuFe 2 O 4 @CeO 2– δ ‐ x samples, the oxidation state of Cu was further confirmed by LMM Auger electron spectroscopy mesurement (Figure c).…”

Section: Resultsmentioning

confidence: 94%

CeO_2–δ‐Modified CuFe₂O₄ with Enhanced Oxygen Transfer as Efficient Catalysts for Selective Oxidation of Fluorene under Mild Conditions

et al. 2018

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The design of efficient catalysts for the selective oxidation of sp3 C–H bond with air at low temperature is of great importance to the scientific and industrial community. In this work, we design a CeO2–δ modified CuFe2O4 catalyst by a post‐modification method for the selective oxidation of fluorene under an air atmosphere and N‐hydroxyphthalimide (NHPI) at 60 °C. HRTEM results indicate that CeO2–δ nanoclusters sized around 5 nm are successfully modified on the surface of CuFe2O4. XPS and H2‐TPR results show that CeO2–δ modification would favor oxygen transfer at lower temperature due to the synergetic effect between CuFe2O4 and CeO2–δ with rich Ce3+/Ce4+ couples. The results demonstrate that CuFe2O4@CeO2–δ‐0.05 with 4.20 wt.‐% Ce present the best catalytic performance with 94 % conversion of fluorene and excellent reusability at least five times. It is anticipated that the modification of CeO2–δ nanoclusters on the surface leads to increased oxygen activation and transfer to CuFe2O4, which favors the activation of NHPI to phthalimide‐N‐oxyl (PINO) radicals and exhibits an improved catalytic performance. Our results provide some guidance on the design of efficient catalysts by the surface modification strategy.

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Efficient photocatalytic degradation of acid fuchsin in aqueous solution using separate porous tetragonal-CuFe2O4 nanotubes

Cited by 76 publications

References 51 publications

Hierarchical SrTiO₃/NiFe₂O₄ composite nanostructures with excellent light response and magnetic performance synthesized toward enhanced photocatalytic activity

Hierarchical SrTiO₃/NiFe₂O₄ composite nanostructures with excellent light response and magnetic performance synthesized toward enhanced photocatalytic activity

Green and chemical-engineered CuFe2O4: characterization, cyclic voltammetry, photocatalytic and photoluminescent investigation for multifunctional applications

CeO_2–δ‐Modified CuFe₂O₄ with Enhanced Oxygen Transfer as Efficient Catalysts for Selective Oxidation of Fluorene under Mild Conditions

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Efficient photocatalytic degradation of acid fuchsin in aqueous solution using separate porous tetragonal-CuFe2O4 nanotubes

Cited by 76 publications

References 51 publications

Hierarchical SrTiO3/NiFe2O4 composite nanostructures with excellent light response and magnetic performance synthesized toward enhanced photocatalytic activity

Hierarchical SrTiO3/NiFe2O4 composite nanostructures with excellent light response and magnetic performance synthesized toward enhanced photocatalytic activity

Green and chemical-engineered CuFe2O4: characterization, cyclic voltammetry, photocatalytic and photoluminescent investigation for multifunctional applications

CeO2–δ‐Modified CuFe2O4 with Enhanced Oxygen Transfer as Efficient Catalysts for Selective Oxidation of Fluorene under Mild Conditions

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Hierarchical SrTiO₃/NiFe₂O₄ composite nanostructures with excellent light response and magnetic performance synthesized toward enhanced photocatalytic activity

Hierarchical SrTiO₃/NiFe₂O₄ composite nanostructures with excellent light response and magnetic performance synthesized toward enhanced photocatalytic activity

CeO_2–δ‐Modified CuFe₂O₄ with Enhanced Oxygen Transfer as Efficient Catalysts for Selective Oxidation of Fluorene under Mild Conditions