ZnO&amp;Fe2O3-incoportaed TiO2 nanofibers as super effective photocatalyst for water splitting under visible light radiation

Barakat, Nasser A.M.; Ahmed, Taha; Motlak, Moaaed; Nassar, Mamdouh M.; Mahmoud, Mohamed S.; Al‐Deyab, Salem S.; El‐Newehy, Mohamed H.; Kim, Hee Young

doi:10.1016/j.apcata.2014.04.045

Cited by 40 publications

(14 citation statements)

References 41 publications

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“…In this study, the photocatalytic activity of TiO 2 nanofibers toward AB hydrolysis under the visible light radiation has been strongly enhanced by ZnO-Fe 2 O 3 -doping. The introduced nanofibers have been prepared using simple, low cost and effective technique; electrospinning (Barakat et al , 2014). The results indicated that the nanofibers composition has strong influence on the catalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Super effective Zn-Fe-doped TiO₂nanofibers as photocatalyst for ammonia borane hydrolysis

Barakat

Motlak

Ahmed

et al. 2015

International Journal of Green Energy

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In this study, the photocatalytic activity of TiO 2 nanofibers toward ammonia borane hydrolysis has been strongly modified by doping the nanostructure by ZnO and Fe 2 O 3 oxides.Due to the differences in the work function and band gap energy among the three semiconductors (TiO 2 , ZnO and Fe 2 O 3 ), illumination of TiO 2 leads to accumulate the electrons and holes on the conduction and valance bands of Fe 2 O 3 and ZnO, respectively. Accordingly, the experimental results indicated that the surface of the obtained nanofibers is very active which results in an instant hydrolysis of ammonia borane molecules reaching the active zone Downloaded by [New York University] at 04:01 19 February 2015A c c e p t e d M a n u s c r i p t 2 surrounding the nanofibers. Moreover, negative activation energy was determined as increasing the temperature led to decrease the photocatalytic performance. Furthermore, kinetic studies indicated that the heterogeneous catalytic reaction describing the ammonia borane hydrolysis process is zero order which additionally supports the super activity of the introduced nanofibers.It was also observed that Fe 2 O 3 content in the introduced nanofibers has distinct influence as the best performance was obtained at 1 wt%. The modified TiO 2 nanofibers were prepared by calcination of electrospun nanofibers composed of titanium isopropoxide, zinc acetate and iron acetate in air at 700 o C for 1 h. Overall, the present study opens a new avenue to overcome the fast electrons/holes recombination dilemma facing TiO 2 -based nanostructures.

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Section: Introductionmentioning

confidence: 99%

Super effective Zn-Fe-doped TiO₂nanofibers as photocatalyst for ammonia borane hydrolysis

Barakat

Motlak

Ahmed

et al. 2015

International Journal of Green Energy

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“…[2][3][4][5][6][7][8][9][10][11][12] In this regard, TiO 2 (titania), a commonly used n-type semiconducting photocatalyst, has received widespread attention due to its relatively high efficiency, easy accessibility, low cost and chemical stability. [2][3][4][5][6][7][8][9][10][11][12] In this regard, TiO 2 (titania), a commonly used n-type semiconducting photocatalyst, has received widespread attention due to its relatively high efficiency, easy accessibility, low cost and chemical stability.…”

Section: Introductionmentioning

confidence: 99%

Fe₂O₃–TiO₂nanosystems by a hybrid PE-CVD/ALD approach: controllable synthesis, growth mechanism, and photocatalytic properties

et al. 2015

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nanocomposites are fabricated by an original vapor phase synthetic strategy, consisting of the initial growth of Fe 2 O 3 nanosystems on fluorine-doped tin oxide substrates by plasma enhanced-chemical vapor deposition, followed by atomic layer deposition of TiO 2 overlayers with variable thickness, and final thermal treatment in air. A thorough characterization of the target systems is carried out by X-ray diffraction, atomic force microscopy, field emission-scanning electron microscopy, energy dispersive X-ray spectroscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy. High purity nanomaterials characterized by the co-presence of Fe 2 O 3 (hematite) and TiO 2 (anatase), with an intimate Fe 2 O 3 -TiO 2 contact, are successfully obtained. In addition, photocatalytic tests demonstrate that, whereas both single-phase oxides do not show appreciable activity, the composite systems are able to degrade methyl orange aqueous solutions under simulated solar light, and even visible light, with an efficiency directly dependent on TiO 2 overlayer thickness. This finding opens attractive perspectives for eventual applications in wastewater treatment. CrystEngCommThis journal is

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“…Accordingly, metal acetates are the most widely used inorganic precursor for the fabrication of metallic nano¯bers using the electrospinning process. [40][41][42] Because of the polycondensation characteristics of the utilized precursors, the sintering process did not a®ect the morphology of the nano¯bers as shown in Fig. 1 which displays two magni¯cations of SEM images for the calcined CoAc/CrAc/PVA electrospun mats.…”

Section: Characterizationmentioning

confidence: 99%

Cobalt/Chromium Nanoparticles-Incorporated Carbon Nanofibers as Effective Nonprecious Catalyst for Methanol Electrooxidation in Alkaline Medium

Mohamed

Motlak

Fouad

et al. 2016

NANO

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Cobalt-Chrome nanoparticles-incorporated carbon nano¯bers (CNFs) are proposed as an e®ec-tive nonprecious electrocatalyst for methanol oxidation in the alkaline media. The introduced nano¯bers were prepared by simple technique, electrospinning. Carbonization of as-spun mat composed of chromium acetate, cobalt acetate and poly(vinyl alcohol) (PVA) at high temperature (900 C) leads to production of the introduced nano¯bers. The physicochemical characteristics were investigated by X-ray di®ractometer (XRD), scanning electron microscope (SEM), eld emission scanning electron microscope (FESEM), transmission electron microscope (TEM) equipped with EDX and TEM mapping. The exploited analyses con¯rmed that the¯nal product is in the form of CNFs decorated by Co/Cr nanoparticles. Based on the results obtained from the cyclic voltammetry (CV) measurements, the proposed Co/Cr-incorporated CNFs possess high electrocatalytic activity toward methanol electrooxidation as a clear peak of methanol oxidation appeared with corresponding current density of 56 mA/cm 2 . Moreover, the current density increased by increasing methanol concentration up to 4.0 M. Overall, the proposed nano¯bers open new avenue for platinum-free and stable nanostructural catalysts for fuel cell technology.

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ZnO&Fe2O3-incoportaed TiO2 nanofibers as super effective photocatalyst for water splitting under visible light radiation

Cited by 40 publications

References 41 publications

Super effective Zn-Fe-doped TiO₂nanofibers as photocatalyst for ammonia borane hydrolysis

Super effective Zn-Fe-doped TiO₂nanofibers as photocatalyst for ammonia borane hydrolysis

Fe₂O₃–TiO₂nanosystems by a hybrid PE-CVD/ALD approach: controllable synthesis, growth mechanism, and photocatalytic properties

Cobalt/Chromium Nanoparticles-Incorporated Carbon Nanofibers as Effective Nonprecious Catalyst for Methanol Electrooxidation in Alkaline Medium

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ZnO&Fe2O3-incoportaed TiO2 nanofibers as super effective photocatalyst for water splitting under visible light radiation

Cited by 40 publications

References 41 publications

Super effective Zn-Fe-doped TiO2nanofibers as photocatalyst for ammonia borane hydrolysis

Super effective Zn-Fe-doped TiO2nanofibers as photocatalyst for ammonia borane hydrolysis

Fe2O3–TiO2nanosystems by a hybrid PE-CVD/ALD approach: controllable synthesis, growth mechanism, and photocatalytic properties

Cobalt/Chromium Nanoparticles-Incorporated Carbon Nanofibers as Effective Nonprecious Catalyst for Methanol Electrooxidation in Alkaline Medium

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Super effective Zn-Fe-doped TiO₂nanofibers as photocatalyst for ammonia borane hydrolysis

Super effective Zn-Fe-doped TiO₂nanofibers as photocatalyst for ammonia borane hydrolysis

Fe₂O₃–TiO₂nanosystems by a hybrid PE-CVD/ALD approach: controllable synthesis, growth mechanism, and photocatalytic properties