Rational design of magnetically separable core/shell Fe<sub>3</sub>O<sub>4</sub>/ZnO heterostructures for enhanced visible-light photodegradation performance

Pham, Hoai Linh; Nguyen, Van Dang; Le, Thi Hong Phong; Ta, Ngoc Bach; Chung, Pham Do; Trần, Quốc Toàn; Dang, Van Thanh

doi:10.1039/d1ra03468e

Cited by 11 publications

(5 citation statements)

References 54 publications

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“…Electron charge transfer is affected by the position of the conduction band (CB) and the valence band (VB) determined for the photocatalysts Fe 3 O 4 , ZrO 2 , and TiO 2 according to Eq’s (20) and (21) ( Ojha et al, 2019 ):

where in the above relations

and

represent the conductivity potential, the capacitance potential and the energy band gap,

is constant for all photocatalysts and represents the energy of free electrons, moreover X is the absolute electronegativity and for Fe 3 O 4 , ZrO 2 and TiO 2 the sequence has values of 5.73, 5.91 and 5.81, respectively ( Bi et al, 2020b ; Jiang et al, 2021 ; Pham et al, 2021 ).

of each photocatalyst was also determined by UV-vis DRS analysis.…”

Section: Fzt Y@wds > Fz Y@s > Fe 3 Omentioning

confidence: 99%

Yolk@Wrinkled-double shell smart nanoreactors: new platforms for mineralization of pharmaceutical wastewater

Zare

Mehrabani-Zeinabad

2023

Front. Chem.

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Nanomaterials with “yolk and shell” “structure” can be considered as “nanoreactors” that have significant potential for application in catalysis. Especially in terms of electrochemical energy storage and conversion, the nanoelectrode has a large specific surface area with a unique yolk@shell structure, which can reduce the volume change of the electrode during the charging and discharging process and fast ion/electron transfer channels. The adsorption of products and the improvement of conversion reaction efficiency can greatly improve the stability, speed and cycle performance of the electrode, and it is a kind of ideal electrode material. In this research, heterojunction nanoreactors (FZT Y@WDS) Fe3O4@ZrO2-X@TiO2-X were firstly synthesized based on the solvothermal combined hard-template process, partial etching and calcination. The response surface method was used to determine the performance of the FZT Y@WDS heterojunction nanoreactors and the effects of four process factors: naproxen concentration (NAP), solution pH, the amount of charged photocatalyst, and the irradiation time for photocatalytic degradation of NAP under visible light irradiation. To maximize the photocatalytic activity, the parameters of the loaded catalyst, the pH of the reaction medium, the initial concentration of NAP, and the irradiation time were set to 0.5 g/L, 3, 10 mg/L, and 60 min, respectively, resulting in complete removal of NAP and the optimum amount was calculated to be 0.5 g/L, 5.246, 14.092 mg/L, and 57.362 min, respectively. Considering the promising photocatalytic activity of FZT Y@WDS under visible light and the separation performance of the nanocomposite, we proposed this photocatalyst as an alternative solution for the treatment of pharmaceutical wastewater.

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where in the above relations

and

represent the conductivity potential, the capacitance potential and the energy band gap,

of each photocatalyst was also determined by UV-vis DRS analysis.…”

Section: Fzt Y@wds > Fz Y@s > Fe 3 Omentioning

confidence: 99%

Yolk@Wrinkled-double shell smart nanoreactors: new platforms for mineralization of pharmaceutical wastewater

Zare

Mehrabani-Zeinabad

2023

Front. Chem.

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“…Furthermore, the VB potential of Fe 3 O 4 (2.535 eV vs NHE) is lower than that of CuO (2.675 eV vs NHE) but surpasses the E o of • OH/OH – (2.38 eV vs NHE). Consequently, the photoexcited holes (h + ) within the VB of Fe 3 O 4 can oxidize OH – on the surface of the nanocomposites, leading to the production of • OH radicals . Finally, the • O 2 – , • OH, and h + species will directly react with MB molecules and degrade them into CO 2 , H 2 O, and other products …”

Section: Resultsmentioning

confidence: 99%

Fe₃O₄/CuO/Chitosan Nanocomposites: An Ultrasound-Assisted Green Approach for Antibacterial and Photocatalytic Properties

Thi Huong,

Thi Mai Huong,

Thi Kim Giang

et al. 2023

ACS Omega

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The fundamental goal of this research was to use an environmentally friendly sonochemical method to synthesize a Fe3O4/CuO/chitosan magnetic nanocomposite. The nanocomposites featured particle sizes ranging from 50 to 90 nm, and structural characteristics were thoroughly examined. Moreover, the material displayed selective photodegradation capabilities with MB, achieving an impressive efficiency of nearly 98% within 180 min under specific conditions. Notably, the material’s reusability was remarkable, maintaining an efficiency of approximately 88% even after five cycles. The possible photodegradation mechanism was proposed based on the evaluation of energy bands, along with a comprehensive analysis of the impacts on MB photodegradation. Concurrently, adsorption isotherms and kinetic models were evaluated. Additionally, this material exhibited promising antibacterial activity against Saccharomyces cerevisiae, Bacillus subtilis, and Escherichia coli. These findings suggested that the Fe3O4/CuO/chitosan material could be utilized in real-world scenarios for environmental purification due to its ability to function as a photocatalyst and antibacterial agent.

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“…The analytical comparative vibrational peak data of these FTIR curves was summarized after more precise interpretation by comparison of these curves with various references. [14,40,[42][43][44][45][46][47][48][49] According to Figure 7, the formation of Fe 3 O 4 nanopatricles (15) during step 2 1 of the synthetic pathway of 26 (Scheme 1), is evidenced by clear absorption peaks of stretching vibrations at 519 cm À 1 for OÀ Fe(II)À O, 598, 665, and 775 cm À 1 for Fe-(III)À OÀ Fe(II), 683 cm À 1 for OÀ Fe(III)À O, and 808 cm À 1 for the 4 atom ring pulse (… Fe(III)À OÀ Fe(III)À O …). Also, in the experimental FTIR spectrum of Fe 3 O 4 , the small and broad peaks at 916 and 960 cm À 1 are related to FeÀ OÀ H bending vibrations.…”

Section: Ftir Analysis Of Fe 3 O 4 @Sio 2 -Nh-ntaa(26)mentioning

confidence: 99%

“…In all experimental FTIR spectra, the C=O stretching vibration peaks of adsorbed CO 2 were observed at 1730 cm À 1 and in the range of 2289-2432 cm À 1 . [48,49]…”

Section: Ftir Analysis Of Fe 3 O 4 @Sio 2 -Nh-ntaa(26)mentioning

confidence: 99%

Decorated Magnetic Nanocatalyst with Trinitriloacetic Acid as a Heterogeneous Catalyst used in the Synthesis of Pyrimido[4,5]quinoline‐2,4‐diones

Rahmatzadeh,

Sardarian,

Nikmanesh

2024

ChemistrySelect

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To answer the challenges of using nitrilotriacetic acid (NTAA) as an efficient, recyclable, and durable acidic nanocatalyst, a novel, versatile, engineerable, affordable, eco‐friendly acidic heterogeneous magnetic nanocatalyst has been synthesized with high thermal stability and excellent catalytic efficiency through immobilization of NTTA on the surface of the functionalized magnetite core‐shell. Fe3O4@SiO2‐NH‐NTAA, has been synthesized and presented here. This nanomagnetic catalyst, Fe3O4@SiO2‐NH‐NTAA, was fully identified and characterized through analytical techniques such as FTIR, FESEM, TEM, EDX, elemental mapping, TGA‐DSC, DLS, VSM, and XRD, in addition to theoretical calculations based on DFT/B3LYP/6‐311++G(d, p). Its catalytic capability as well as easy separation, recoverability, and reuseability were examined in the one‐pot preparation of pyrimido[4,5]quinolone‐2,4‐diones under mild conditions, where the high performance of the Fe3O4@SiO2‐NH‐NTAA magnetic nano‐catalyst was proved by excellent reaction yield (>98 %) and the catalyst's recovery efficiency (>98 %). Due to the presence of NTAA's zwitterionic forms in the outermost layer of Fe3O4@SiO2‐NH‐NTAA, this acidic catalyst causes the progress and control of the three‐component reaction in this article well and in the desired direction.

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Rational design of magnetically separable core/shell Fe₃O₄/ZnO heterostructures for enhanced visible-light photodegradation performance

Abstract: Magnetically separable core/shell Fe3O4/ZnO heteronanostructures (MSCSFZ) were synthesized by a facile approach, and their application for enhanced solar photodegradation of RhB was studied.

Cited by 11 publications

References 54 publications

Yolk@Wrinkled-double shell smart nanoreactors: new platforms for mineralization of pharmaceutical wastewater

Yolk@Wrinkled-double shell smart nanoreactors: new platforms for mineralization of pharmaceutical wastewater

Fe₃O₄/CuO/Chitosan Nanocomposites: An Ultrasound-Assisted Green Approach for Antibacterial and Photocatalytic Properties

Decorated Magnetic Nanocatalyst with Trinitriloacetic Acid as a Heterogeneous Catalyst used in the Synthesis of Pyrimido[4,5]quinoline‐2,4‐diones

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Rational design of magnetically separable core/shell Fe3O4/ZnO heterostructures for enhanced visible-light photodegradation performance

Abstract: Magnetically separable core/shell Fe3O4/ZnO heteronanostructures (MSCSFZ) were synthesized by a facile approach, and their application for enhanced solar photodegradation of RhB was studied.

Cited by 11 publications

References 54 publications

Yolk@Wrinkled-double shell smart nanoreactors: new platforms for mineralization of pharmaceutical wastewater

Yolk@Wrinkled-double shell smart nanoreactors: new platforms for mineralization of pharmaceutical wastewater

Fe3O4/CuO/Chitosan Nanocomposites: An Ultrasound-Assisted Green Approach for Antibacterial and Photocatalytic Properties

Decorated Magnetic Nanocatalyst with Trinitriloacetic Acid as a Heterogeneous Catalyst used in the Synthesis of Pyrimido[4,5]quinoline‐2,4‐diones

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Product

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Rational design of magnetically separable core/shell Fe₃O₄/ZnO heterostructures for enhanced visible-light photodegradation performance

Fe₃O₄/CuO/Chitosan Nanocomposites: An Ultrasound-Assisted Green Approach for Antibacterial and Photocatalytic Properties