Ternary CoFe2O4/g-C3N4/ZnO heterostructure as an efficient and magnetically separable visible-light photocatalyst: Characterization, dye purification, and mechanism

Bahiraei, Hamed; Azarakhsh, S.; Ghasemi, Shahnaz

doi:10.1016/j.ceramint.2023.03.240

Cited by 20 publications

(5 citation statements)

References 39 publications

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“…To understand the enhancement in photodynamic activity and the recombination and separation behavior of electron-hole pairs (e − −h + ) in Cu 2 O@rGO, the steady-state photoluminescence spectrum (PL), transient photocurrent response spectrum, and electrochemical impedance spectroscopy (EIS-Nyquist) were comprehensively characterized. The PL spectrum characterized the separation efficiency of e − and h + , and higher intensity represented lower separation efficiency [ 43 ]. As shown in Figure 3 a, it is clear that the PL emission peak of Cu 2 O@rGO was lower than that of Cu 2 O, indicating its better efficiency of charge transfer and its better ability to prevent the electron-hole recombination [ 44 , 45 ].…”

Section: Resultsmentioning

confidence: 99%

“…The PL spectrum characterized the separation efficiency of e − and h + , and higher intensity represented lower separation efficiency [43]. As shown in Figure 3a, it is clear that the PL emission peak of Cu2O@rGO was lower than that of Cu2O, indicating its better efficiency of charge transfer and its better ability to prevent the electron−hole recombination [44,45].…”

Section: Photodynamic Performance Of Cu 2 O@rgomentioning

confidence: 99%

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A Photochemically Active Cu2O Nanoparticle Endows Scaffolds with Good Antibacterial Performance by Efficiently Generating Reactive Oxygen Species

He,

Zan,

et al. 2024

Nanomaterials

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Cuprous oxide (Cu2O) has great potential in photodynamic therapy for implant-associated infections due to its good biocompatibility and photoelectric properties. Nevertheless, the rapid recombination of electrons and holes weakens its photodynamic antibacterial effect. In this work, a new nanosystem (Cu2O@rGO) with excellent photodynamic performance was designed via the in situ growth of Cu2O on reduced graphene oxide (rGO). Specifically, rGO with lower Fermi levels served as an electron trap to capture photoexcited electrons from Cu2O, thereby promoting electron-hole separation. More importantly, the surface of rGO could quickly transfer electrons from Cu2O owing to its excellent conductivity, thus efficiently suppressing the recombination of electron-hole pairs. Subsequently, the Cu2O@rGO nanoparticle was introduced into poly-L-lactic acid (PLLA) powder to prepare PLLA/Cu2O@rGO porous scaffolds through selective laser sintering. Photochemical analysis showed that the photocurrent of Cu2O@rGO increased by about two times after the incorporation of GO nanosheets, thus enhancing the efficiency of photogenerated charge carriers and promoting electron-hole separation. Moreover, the ROS production of the PLLA/Cu2O@rGO scaffold was significantly increased by about two times as compared with that of the PLLA/Cu2O scaffold. The antibacterial results showed that PLLA/Cu2O@rGO possessed antibacterial rates of 83.7% and 81.3% against Escherichia coli and Staphylococcus aureus, respectively. In summary, this work provides an effective strategy for combating implant-related infections.

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Section: Resultsmentioning

confidence: 99%

Section: Photodynamic Performance Of Cu 2 O@rgomentioning

confidence: 99%

A Photochemically Active Cu2O Nanoparticle Endows Scaffolds with Good Antibacterial Performance by Efficiently Generating Reactive Oxygen Species

He,

Zan,

et al. 2024

Nanomaterials

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“…The rapid population growth and industrial development observed in recent decades have led to an increase in water demand in both the industrial and urban sectors. This, coupled with the disposal of toxic organic pollutants into water resources, poses a threat to the environment and human health (Jeevanantham et al 2019;Bahiraei et al 2023). Among these pollutants are synthetic dyes, which are widely used in the textile industry.…”

Section: Introductionmentioning

confidence: 99%

“…A relatively new and promising material, polymeric graphitic carbon nitride (g-C3N4) (CN), possesses suitable bands for heterojunction formation with ZnO and has been studied by different authors (Martins et al 2021;Dantas et al 2022;Bahiraei et al 2023). Bi et al (2023) synthesized ZnO/g-C3N4 via ultrasonic dispersion with good photocatalytic activity for Rhodamine B degradation.…”

Section: Introductionmentioning

confidence: 99%

“…To achieve UN Sustainable Development Goal 6, which aims to ensure the availability and sustainable management of water and sanitation for all, a variety of methods have been studied and applied for the removal and degradation of wastewater (Justino et al 2019;Pellicer et al 2020;Goswami et al 2023;Yılmaz et al 2023). In this context, heterogeneous photocatalysis is a promising technique for low cost and environmentally desirable characteristics (Bahiraei et al 2023). This technique involves the use of semiconductors that can be excited under irradiation, resulting in the generation of electron-hole pairs on their surface.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Effluent Degradation with Zinc Oxide, Carbon Nitride, and Carbon Xerogel Trifecta on brass monoliths

Silva,

Garcia,

Rodrigues

et al. 2024

Preprint

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In recent years, heterogeneous photocatalysis has emerged as an alternative for the treatment of organic pollutants. This technique presents advantages such as low cost and ease of operation. However, finding a semiconductor material with operational viability and high activity under solar irradiation is a challenge, almost always in nanometric sizes. Furthermore, in many processes, the photocatalysts are suspended in the solution, which means that additional steps are required to remove them, which can make the technique economically unviable, especially when the catalysts are in nanometric size. This work aims to demonstrate the feasibility of using structured photocatalyst (ZnO, g-C3N4, and carbon xerogel), optimized for this photodegradation process. The synthesized materials were characterized by nitrogen adsorption and desorption techniques, X-ray diffraction (XRD), and diffuse reflectance spectroscopy (DRS). Adhesion testing demonstrated the efficiency of the deposition technique, with film adhesion exceeding 90%. The photocatalytic evaluation was performed with a mixture of three textile dyes in a recycle photoreactor, varying pH (4.7 and 10), recycle flow rate (2, 4, and 6 L h− 1), immobilized mass (1, 2, and 3 mg cm− 2), monolith height (1.5, 3.0, and 4.5 cm), and type of radiation (solar and visible artificials; and natural solar). The structured photocatalyst was able to degrade over 99% of the dye mixture using artificial radiation. The results obtained using solar energy were highly promising, achieving a degradation efficiency of approximately 74%. Furthermore, it was possible to regenerate the structured photocatalyst up to seven consecutive times using exclusively natural solar light and maintain a degradation rate of around 70%. These results reinforce the feasibility and potential application of this system in photocatalytic reactions, highlighting its effectiveness and sustainability.

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Synergistic effect of noble metal Pt and Zn0.25Cd0.75S QDs on ZnO: broad spectral response and its outstanding photocatalytic performance

Liu,

Zhao,

et al. 2024

J Nanopart Res

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Ternary CoFe2O4/g-C3N4/ZnO heterostructure as an efficient and magnetically separable visible-light photocatalyst: Characterization, dye purification, and mechanism

Cited by 20 publications

References 39 publications

A Photochemically Active Cu2O Nanoparticle Endows Scaffolds with Good Antibacterial Performance by Efficiently Generating Reactive Oxygen Species

A Photochemically Active Cu2O Nanoparticle Endows Scaffolds with Good Antibacterial Performance by Efficiently Generating Reactive Oxygen Species

Enhanced Effluent Degradation with Zinc Oxide, Carbon Nitride, and Carbon Xerogel Trifecta on brass monoliths

Synergistic effect of noble metal Pt and Zn0.25Cd0.75S QDs on ZnO: broad spectral response and its outstanding photocatalytic performance

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