Fabrication of magnetically recyclable ZrO2-TiO2/CoFe2O4 hollow core/shell photocatalysts: Improving photocatalytic efficiency under sunlight irradiation

Jing, Hongxia; Huang, Jing; Li, Na; Li, Long-xiang; Zhang, Jingyue

doi:10.1007/s11814-019-0241-y

Cited by 13 publications

(2 citation statements)

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“…[21] In photocatalysts with magnetic properties, a magnetic core of CoFe 2 O 4 is used to recycle the photocatalyst magnetically. [22] It has been determined that the composite materials obtained when magnetic core TiO 2 photocatalysts are modified with carbon additives, such as fullerenes (C60), carbon nanotubes (CNT), and graphene, a conductive polymer, increase the photocatalytic activity. [23] Polyaniline (PANI) is a conductive polymer type that attracts attention due to its environmental stability, high electrical conductivity and corrosion protection, tunable conductivity by doping with appropriate dopants, non-toxicity, inexpensive monomer, and easy synthesis.…”

Section: Introductionmentioning

confidence: 99%

“…Cobalt ferrite (CoFe 2 O 4 ), which has a cubic structure, is typically preferred for the decolorization of inorganic pollutants as a photocatalyst due to its superior electromagnetic performance, excellent chemical stability, magnetic saturation power, and mechanical hardness [21] . In photocatalysts with magnetic properties, a magnetic core of CoFe 2 O 4 is used to recycle the photocatalyst magnetically [22] . It has been determined that the composite materials obtained when magnetic core TiO 2 photocatalysts are modified with carbon additives, such as fullerenes (C60), carbon nanotubes (CNT), and graphene, a conductive polymer, increase the photocatalytic activity [23] …”

Section: Introductionmentioning

confidence: 99%

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Synthesis of CoFe₂O₄/TiO₂/PANI Nanocomposite Photocatalyst, and Examination of Its Decolorization Efficiency on Rhodamine B

Keleş Güner,

Kızıltaş,

Tırpancı

2024

ChemistrySelect

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This study aims to reduce the band gap by doping wide band‐gap TiO2 with CoFe2O4 and PANI to improve the photocatalytic efficiency and examine the decolorization kinetic of Rhodamine B (RhB). The characteristics of the nanocomposites were thoroughly assessed through the utilization of SEM‐EDS, TEM, XRD, FTIR, VSM, UV‐Vis, PL, and XPS analyses. The SEM and TEM analyses revealed that CoFe2O4/TiO2/PANI has a homogeneously porous structure. XRD analysis results were found to show good agreement with the standard diffraction data cards. The band structures obtained by FTIR analyses were compatible with literature studies. The band gap energies determined by UV‐Vis analyses were determined as 2.86 eV for CoFe2O4/TiO2/PANI. The decrease of CoFe2O4/TiO2/PANI recombination rate was proven with PL results. The different initial dye concentrations, temperature, and light intensity parameters were used to determine the decolorization kinetics of RhB over CoFe2O4/TiO2/PANI. The photodegradation rates of RhB in reactions catalyzed by PANI, CoFe2O4, commercial‐TiO2, CoFe2O4/TiO2, and CoFe2O4/TiO2/PANI were determined as 7.6 %, 20.7 %, 26.6 %, 32.4 %, and 48.8 %, respectively. According to data obtained from the decolorization of RhB on CoFe2O4/TiO2/PANI nanocomposite, the appropriate kinetic model was determined Network kinetic. The adsorption equilibrium constant (KB) and activation energy (Ea) were calculated as 0.007 and 7.9 kJ/mol, respectively.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis of CoFe₂O₄/TiO₂/PANI Nanocomposite Photocatalyst, and Examination of Its Decolorization Efficiency on Rhodamine B

Keleş Güner,

Kızıltaş,

Tırpancı

2024

ChemistrySelect

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Surface Roughening Strategy for Highly Efficient Bifunctional Electrocatalyst: Combination of Atomic Layer Deposition and Anion Exchange Reaction

et al. 2021

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nontoxic, abundant, and durable catalysts with high activity toward the oxygen and hydrogen evolution reactions (OER and HER, respectively) are preferred. [3] Electrode material and architecture play critical roles in electrocatalytic water splitting. [4] Electrochemical reactions occur at the electrode-electrolyte interface; therefore, electrochemical processes are interfacedependent. Typically, only a fraction of the exposed sites, namely the surface active sites, participates in the electrochemical charge transfer process (Scheme 1a). The electrochemically active surface area (ECSA) generated by the electrical double layer formed at the electrode-electrolyte interface features numerous inactive surface sites that do not participate in electrochemical charge transfer (electronation-deelectronation). Building 3D architectures with large ECSAs is a common method for increasing active surface sites and accelerating electrochemical water splitting (Scheme 1b). In particular, coreshell architectures are highly desirable for good electrode performance because they combine the distinct properties of the core and shell materials used to build multifunctional electrodes. [5] For example, core-shell electrodes with NiCo 2 S 4 (NCS) cores and various shell structures have been evaluated for electrocatalytic water splitting. [6] However, coreshell architectures lengthen the electron transport pathways and increase electrode mass and interfacial resistance, hindering the efficient electrode utilization. The increase in total mass results in lower mass activity, although the estimated electrochemical performance of the core-shell structure is superior to that of the core structure as a function of the geometric area of the electrodes. Hence, developing innovative electrode nano-architectures to increase the N A with higher mass activity is an important task for developing commercial electrochemical energy conversion and storage devices. Nano-roughening the outer surfaces of nanostructures is an advanced method for increasing N A . It has similar ECSAs compared to conventional core-shell structures, but a greater proportion of active sites and massive mass activity. The ECSAs of the structures in Scheme 1b,d are the same; however, the ratio of active to inactive sites of the structure in Scheme 1d is higher than that of the structure in Scheme 1b. This can be achieved using several approaches, such as top-down physical etching, controlled Electrocatalytic water splitting, which is an interface-dominated process, can be significantly accelerated by increasing the number of front-line surface active sites (N A ) of the electrocatalyst. In this study, a unique method is used for increasing the N A by converting the smooth ultrathin atomic-layer-deposited nanoshells of the electrocatalysts into nano-roughened active shell layers using a controlled anion-exchange reaction (AER). The coarse thin nanoshells present abundant surface active sites, which are generated owing to the inherent unit-cell volume mismatch induced during th...

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Metal Oxide-Based Materials for Urea Oxidation Reaction

Phule,

Gurav,

Tarwal

et al. 2024

Electrocatalytic Materials

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Fabrication of magnetically recyclable ZrO2-TiO2/CoFe2O4 hollow core/shell photocatalysts: Improving photocatalytic efficiency under sunlight irradiation

Cited by 13 publications

References 37 publications

Synthesis of CoFe₂O₄/TiO₂/PANI Nanocomposite Photocatalyst, and Examination of Its Decolorization Efficiency on Rhodamine B

Synthesis of CoFe₂O₄/TiO₂/PANI Nanocomposite Photocatalyst, and Examination of Its Decolorization Efficiency on Rhodamine B

Surface Roughening Strategy for Highly Efficient Bifunctional Electrocatalyst: Combination of Atomic Layer Deposition and Anion Exchange Reaction

Metal Oxide-Based Materials for Urea Oxidation Reaction

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Fabrication of magnetically recyclable ZrO2-TiO2/CoFe2O4 hollow core/shell photocatalysts: Improving photocatalytic efficiency under sunlight irradiation

Cited by 13 publications

References 37 publications

Synthesis of CoFe2O4/TiO2/PANI Nanocomposite Photocatalyst, and Examination of Its Decolorization Efficiency on Rhodamine B

Synthesis of CoFe2O4/TiO2/PANI Nanocomposite Photocatalyst, and Examination of Its Decolorization Efficiency on Rhodamine B

Surface Roughening Strategy for Highly Efficient Bifunctional Electrocatalyst: Combination of Atomic Layer Deposition and Anion Exchange Reaction

Metal Oxide-Based Materials for Urea Oxidation Reaction

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Synthesis of CoFe₂O₄/TiO₂/PANI Nanocomposite Photocatalyst, and Examination of Its Decolorization Efficiency on Rhodamine B

Synthesis of CoFe₂O₄/TiO₂/PANI Nanocomposite Photocatalyst, and Examination of Its Decolorization Efficiency on Rhodamine B